What is a convection current

Answers

Answer 1

Answer:

Convection currents transfer heat from one place to another by mass motion of a fluid such as water, air, or molten rock. The heat transfer function of convection currents drives the earth's ocean currents, atmospheric weather, and geology.

Explanation:


Related Questions

The shape of a child's nose may resemble that of the of the mother due to A .heredity B. similarity C. reflection D. familiarity​

Answers

The correct answer is A. Heredity

Type the correct answer in the box. Spell all words correctly.
What does the scientific method help test in environmental science?
The scientific method is a way to test a
and gain a better understanding of the world.

Answers

The scientific method is a way to test a hypothesis and gain a better understanding of the world.

What is the scientific method?

The scientific method is a process used to explore observations and answer questions.

The usual process involves making conjectures -that would be the hypotheses-, drawing predictions resulting from a logical consequence, and carrying out experiments based on those predictions.

The ultimate goal is to test a scientific hypothesis.

Thus, this could be the answer.

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. Conduction of heat takes place only in .......
a Solids
b) Liquids
c) Gaseous
d) air

Answers

Answer:

Option A: Solids

Explanation:

Due to the fact that heat is transported from a hotter body to a cooler body when two objects are kept in thermal contact, conduction only occurs in solids and not in liquids or gases. Conduction is the term for this mechanism, which uses the same body temperature. When two bodies remain together during conduction to transfer heat In order to transmit heat energy quickly and more efficiently, the molecules of both entities vibrate and collide with one another. Since solids have compactly packed molecules, this allows the molecules to vibrate more and transfer heat more effectively than liquids and gases. When molecules in close proximity to one another clash, energy is transferred. Due to the molecules' near closeness and, in the case of crystals, their clearly defined structure, this occurs very readily in a solid. A few things alter when heat transport in liquids and gases is taken into account. The molecules are not as close together, and gravity has a particular, confusing influence. Heat is transferred through collisions of nearby particles in a process known as convection. The metal surface particles are transmitting heat to the liquid through conduction at the metal-water interface if convection is occurring between a solid that is hotter than the liquid adjacent to it, such as a pan on the stove. But when that occurs, the water's density begins to alter. The water molecules at the surface move faster, contain more energy, and occupy more space per mass (they are less dense). Because water molecules may pass one another and gravity makes this easier, the less dense water near the metal surface is replaced by the more dense water above it. Natural convection is the mechanism through which a liquid or gas moves in this manner as a result of variations in density. Conduction is no longer possible unless you can prevent the effect of fluid density on the flow of gases or liquids. Fundamentally, in both liquids and gases as well as solids, molecules continue to exchange energy through collisions. Conduction, however, performs this considerably more effectively in liquids at the metal-liquid contact and less so as you travel away from the interface and upward through the liquid. Convection is the movement of particles to transfer heat.

Bottom Line: Conduction may occur in gases and liquids, but you must be able to reduce the impact of gravity. These are known as "stagnant fluids." Convection is the term used to describe fluid movement caused by density variations when they are not prevented.

Which of the following organelles is common to both prokaryotic and eukaryotic cells?
A.
Cytoskeleton
B.
Nucleus
C.
Nucl

Answers

Answer:

A) Cytoskeleton

Explanation:

The cytoskeleton is a network of fibers extending through the cytoplasm that provides. mechanical support and maintains the cell's shape.

A Cytoskeleton is the answer

The release of greenhouse gases from one state can enter another state due to atmospheric circulation. If there is a problem between states, what do you think would be the best way to handle this problem???

Answers

Due to atmospheric circulation, the greenhouse gases can enter from one state to another state. These changes are caused by extra heat in the climate system due to the addition of greenhouse gases to the atmosphere.

What are the ways to handle greenhouse effect?

The Earth's radiated energy is trapped by greenhouse gases such carbon dioxide, methane, nitrous oxide, and some manmade compounds, which keeps heat in the atmosphere.

The best way to handle this problem are:

Fossil fuels should remain underground.Switch to electric vehicles fast.Make the world's energy supply renewable.Double the extent of forest and rehabilitate habitats.Stop supporting fossil fuels abroad.

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What does this symbol indicate on a weather map?


A. A stationary front

B. A cold front

C. A warm front

D. An occluded front

Answers

Answer:

C

Explanation:

Is a symbol..............

B. Cold Front
It’s right:/?

What happens at the end of the dark reactions?

Answers

Answer: Glucose is the end product of the dark reaction.

Explanation:

What are Interphase, prophase I, metaphase I, anaphase I, telophase I, prophase Il, metaphase II, anaphase II, telophase Il in meiosis.

Answers

The stages of meiosis 1 and meiosis 2 is discussed below:

What is meiosis?

Eukaryotic cells (plants, animals, and fungi) reproduce sexually through a process called meiosis. Chromosome reduction is the process by which haploid cells are created from diploid cells, which are cells with two complete and identical sets of chromosomes.

The number of chromosomes in each cell is halved during meiosis I, which starts with one diploid parent cell and ends with two haploid daughter cells.

Maintaining the number of chromosomes in each cell, meiosis II begins with two haploid parent cells and finishes with four haploid daughter cells. Before meiosis II, homologous pairs of cells divide into chromosomes while in meiosis I.

These chromosomes are further divided into sister chromatids during meiosis II. Meiosis II does not include genetic material crossing across or recombining between chromosomal pairs, whereas meiosis I do.

This happen in the  prophase contains five subphases and is lengthy and complex during meiosis I. The equatorial plane in meiosis II is aligned 90 degrees differently than in meiosis.

Therefore interphase1, prophase 1, metaphase 1, anaphase, and telophase 1 are the stages of meiosis 1 and prophase Il, metaphase II, anaphase II, and telophase Il in meiosis 2.

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A muscle cell with high concentration of carbon dioxide and a low concentration of oxygen is surrounded by blood with a high concentration of oxygen and a low concentration of carbon dioxide. No ATP was used by the cell for cell transport of the carbon dioxide or oxygen molecules which of the following events will most likely happen?

Answers

Option C is correct.

What do you mean by muscle cell?

The cells that make up muscular tissue are referred to as myocytes or muscle cells.

No oxygen is used during anaerobic respiration, hence less energy is released. During intense exercise, the glucose molecule splits into two molecules of lactic acid, which accumulate in the muscles. When the bloodstream cannot provide oxygen quickly enough for aerobic respiration, anaerobic respiration takes place.

The option missing is the query is given below:

A. Carbon dioxide will move into the cell by diffusion.

B. Carbon dioxide and oxygen will move out of the cell by osmosis.

C. Oxygen will move into the cell by diffusion.

D. Oxygen and carbon dioxide will move into the cell by osmosis.

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Question 2
If purple flowers are dominant to white flowers. What are the possible genotypes of an organism with a purple phenotype?
Your answer:
O Pp. pp, PP
O PP, PP
0
PP
Pn

Answers

Answer:

Pp, PP

Explanation:

Purple: P

White: p

Purple flowers can still carry the white flower trait, that's how their offspring gets it. Since this offspring is purple, the dominant trait is present and will always show over the recessive trait. So of you get a purple flower the possible genotypes are PP and Pp, if you have a white flower the possible genotypes are only pp. :)

Which function involves the circulatory system working with the respiratory system?

A. Lowering body temperature

B. Enabling cellular respiration

C. Stopping bacterial infection

D. Maintaining liver function

Answers

The function involves the circulatory system working with the respiratory system is Enabling cellular respiration. Thus, option "B" is correct.

What are circulatory and Respiratory system?

Respiratory system is a set of organs which help in the exchange of gases in the body. They bring oxygen from outside into the body and release carbon dioxide from inside the body to the outside world. The exchange of the gases takes place at the alveolar site (or gills in aquatic animals).

The circulatory system then carries this oxygen (mixed in blood) from gas exchange site to all the cells of the body. In addition, it also brings carbon dioxide (waste product of cellular respiration) from all the cells to the gas exchange site (respiratory system).

Thus, option "B" is correct.

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What is the name of the region where double-stranded single circular DNA is found in the Prokaryotic cell?

Answers

Answer:

the nucleoid

Key Points. Prokaryotic cells lack a defined nucleus, but have a region in the cell, termed the nucleoid, in which a single chromosomal, circular, double-stranded DNA molecule is located.

Biological systems examples that can be found during a nature walk, such as cellular respiration ​

Answers

You can also find photosynthesis, the carbon cycle, the water cycle and others

Which of these best describes a hormone?

A. A chain of amino acids secreted by a gland

B. A neurotransmitter with a specific target

C. A neurotransmitter carried in the blood

D. A chemical message secreted by a gland

Answers

Answer:

option D

A chemical message secreted by a gland.

Explaination: A hormone is a chemical that is made by specialist cells, usually within an endocrine gland, and it is released into the bloodstream to send a message to another part of the body. It is often referred to as a 'chemical messenger'.

One of the primary concepts of biology is natural selection which is based on the principle of an organism s ability to adapt to their surrounding environment. This concept also applies to all life on Earth, and it is certainly applicable to people in the workplace as well.

Thinking futuristic, to when you will have established your unique niche in the medical field, what traits do you possess that will give you the ability to adapt and thrive within your workplace environment?

Answers

Answer:

I think the traits you possess that will give you the ability to adapt and thrive in your workplace environment depends on your passion and skill for medicine and able to collaborate with colleagues. Hope it helps!

Match the following descriptions to the correct corresponding
stage of the cell cycle.
Mitosis
[Choose ]
Cytokinesis
[Choose ]
Synthesis
[Choose ]
Gap 1
[Choose ]
Gap 2
[Choose ]
Interphase
[Choose ]
Previous

Answers

The descriptions are not found here but mitosis is cell division, whereas cytokinesis is the division of the cytoplasm.

What is the cell cycle?

The cell cycle is a series of steps that initiate with cell growth (G1) and ends with cell division (mitosis).

The cell cycle can be divided into interphase (G1, S and G2) and mitotic stage (cell division and cytokinesis).

The Synthesis (S) step  can be defined as the interphase stage where DNA replication occurs.

Growth 1 (G1) and Growth 2 (G2) are fundamental stages where the cell prepares for its division by synthesizing key proteins required during mitosis.

Mitosis is the cell division process where duplicated genetic material (DNA) separate and two genetically identical new daughter cells form.

In conclusion, the descriptions are not found here but mitosis is cell division, whereas cytokinesis is the division of the cytoplasm.

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Define Evolution and Natural Selection

Answers

Answer:

Evolution may be defined as any net directional change or any cumulative change in the characteristics of organisms or populations over many generations—in other words, descent with modification… It explicitly includes the origin as well as the spread of alleles, variants, trait values, or character states.

Natural selection is the process through which populations of living organisms adapt and change. Individuals in a population are naturally variable, meaning that they are all different in some ways. This variation means that some individuals have traits better suited to the environment than others

Explanation:

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1. The words rotate and revolve have the same meaning when describing the motion of planets.
a. True
b. False

Answers

Answer:

False

Revolution:

The movement of the Earth around the Sun, once every 365.25 days is called a revolution.

Rotation:

The movement of the Earth as it takes 24 hours to spin on its axis is called a rotation.

The area around a pond is cooler than the rest of the forest. Which term describes the area around the pond?

Answers

The term microclimate best describes the area around the pond.

What is Pond?

A pond may be defined as an aquatic habitat which is a tiny body of still water originated naturally or by artificial norms. It is usually smaller than a lake.

A microclimate may be defined as a climate of a small area or a distinct place within a location as distinguished from the surroundings of the complete area.

A microclimate usually involves a very smaller area in contrast to determining the climate of a particular location.

The complete question is as follows:

The area around the pond is cooler than the rest of the forest. Which term describes the area around the pond?

BiomeMicroclimateMacroclimate

Therefore, the correct option for this question is B, i.e. microclimate.

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a plant grows in soil contaminated with toxins. through which structure would toxins first enter the plant

Answers

The roots. The soil is toxic, and the roots absorb nutrients in the form of minerals and water from the soil so it would enter the plant via the roots.

Diego is conducting an experiment to investigate how temperature affects chemical change. He has three pieces of cheese that he just bought from the store. He left one piece of cheese outside, one on the kitchen counter, and one in the refrigerator. His prediction is that the piece in the refrigerator will not mold, the one on the counter will mold a little, and the one outside will mold a lot. Select the conclusion The piece of cheese in the refrigerator had the most amount of chemical change. The piece of cheese on the counter had the most amount of chemical change. The piece of cheese in the refrigerator had the least amount of chemical change. The piece of cheese outside had the least amount of chemical change.

Answers

The piece of cheese in the refrigerator had the least amount of chemical change.

Moulding occurs on substances which are warm and moistMold thrives in warm and humid placesIn refrigerators, the environment is cool and dryThis environment hinders the growth of moldThe bacteria and fungi require optimum temperatures to flourish, which is not present in a refrigeratorThe cheese placed outside and on the counter will grow mold as those environments do not arrest the growth of moldRefrigeration ensures that food is not spoilt

Therefore, the least amount of chemical change takes place on the cheese placed in the refrigerator.

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How many feedback loops are possible in a food web of 20 species?

Answers

There are thousands of feedback loops possible in a food web of 20 species. Why? Well, on average, about 60% of the food we eat comes from carbohydrates. This process can be repeated multiple times, where positive feedback loops are counteracted by negative feedback loops. Upon reference to a food web of 20 species, thousands of feedback loops are possibly created through this process.

Identify the missing parts of the carbon cycle

photosynthesis

burning oil and coal

respiration

decomposers

CO2 in atmosphere

plants

animals

factories

fossil fuels

Answers

Answer:

1) sunlight

2) organic carbon

3) Dead organisms and waste products

4) Animal respiration

5) Plant respiration

6) Root respiration

A recessive gene located on the X chromosome is the cause of one type of colorblindness (denoted by Xc). Let the genotype for normal vision be denoted by X+. Suppose a mother with normal vision (X+Xc) and a father with normal vision (X+Y) reproduce. Their child's possible genotypes can be illustrated with the following Punnett square. Punnett square If they have a daughter, her chance of having this type of colorblindness is %.

Answers

The scenario will be Son: 25% colorblind daughter: 25% colorblind son: 25% of carrier daughters with normal vision: 25% normal son

What is color blindness?

The condition is frequently inherited. Certain eye diseases and medications are also possible causes. Men are more affected than women.

Color blindness is characterized by the inability to distinguish between red and green shades.

A colorblind man's genotype is XcY, and a heterozygous carrier female's genotype is XcX. A cross between XcY and XcX would result in progeny with the following ratio=

Son: 25% colorblind daughter: 25% colorblind son: 25% of carrier daughters with normal vision: 25% normal son.

Thus, the couple is likely to have a son who is half normal and half affected. Similarly, the couple is likely to have 50% normal daughters and 50% colorblind daughters.

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Explain why there are fewer organisms at higher trophic levels.​

Answers

Answer:

As we move to higher Trophic levels, we will, generally speaking, see larger animals. And yet, moving to higher trophic levels, these larger animals need to live on smaller energy production from the next trophic level down. As a result, there will usually be fewer animals at higher trophic levels.

Explanation:

Macrolides generally have bacteriostatic and bacteriocidal activity?

1.true
2.false

Answers

Macrolides generally have bacteriostatic and bacteriocidal activity?

A. True

B. False

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1. Which human traits form a wide range of states instead of two distinct states?
A) cleft chin
B) eye color
C) widow's peak
D) fully attached earlobes

2. Don's earlobes are fully attached, Both of his parents have free earlobes (not fully attached). One of Don's grandparents has fully attached earlobes, like he does.
What can be said about fully attached earlobes?
A) Fully attached earlobes are dominant. Both of Don's parents do not have them
B) Fully attached earlobes are recessive. Both of Don's parents have them.
C) Fully attached earlobes are dominant. They skip a generation in inheritance.
D) Fully attached earlobes are recessive. They skip a generation in inheritance.

3. A scientist is doing experiments using some ancient seeds discovered in an ancient temple.
Which option is a prediction that relates the outcome of the scientist's experiments with probability?
A) The scientist thinks that the seeds were in the temple as part of a ritual.
B) The scientist thinks that more seeds can be recovered from other similar locations on Earth.
C) The scientist thinks that seeds that are old have 0% chance of sprouting; so, if they do, they must be modern.
D) The scientist thinks that if conditions are good, about 10% of the seeds will sprout and grow into plants

4. Which option describes how genes control the traits of a cell?
A) Genes code for specific structures and molecules in a cell. Those structures and molecules form the traits of the cell.
B) Genes become building blocks for specific structures and molecules in a cell. Those structures and molecules farm the traits of the cell.
C) Genes determine how much energy goes to each organelle in the cell. The organelles form the traits of the cell.
D) Genes are molecules that organelles are made out of. Once assembled into organelles, they form the traits of the cell.

Answers

Explanation:

hope it helps

thank you!!!

The human eye color is a trait which forms a wide range of states instead of two distinct states. Fully attached earlobes is a recessive trait which is seen in a very rare cases. Thus, the correct options are 1 (B), 2 (D), 3 (D), and 4 (A).

What are traits?

Traits are the characters which are controlled by the genes. Genes are present on the DNA molecule which encodes for different proteins which are responsible for the traits or phenotypic characters of an organism.

Quantitative traits are the traits for which the phenotypic variation is continuously distributed in the populations, with the variation in population often approximating the normal distribution on an appropriate scale. The human eye color is an example of quantitative trait which is controlled by different genes.

Recessive traits are the traits which are seen very rarely as these are only shown when present in homozygous condition. These traits are seen to skip generations as seen in the case of fully attached earlobes.

When a scientist is doing experiments using the ancient seeds which he discovered in an ancient temple, the scientist thinks that if the optimum conditions are provided to the seeds then about 10% of the seeds will sprout and therefore grow into plants.

Genes are the parts of the DNA which are responsible for encoding proteins. These proteins controls the phenotypic characters of an individual.

Therefore, the correct options are 1 (B), 2 (D), 3 (D), and 4 (A).

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Scientific research about how disruptions of the carbon and nitrogen cycles
affect people will be least valuable if the results:
O A. are confirmed by peer review but are rejected by the public.
B. are inconclusive but might possibly be true.
O
C. help us slow the growth of Earth's human population.
O
D. help us prevent a continued rise in Earth's sea level.

Answers

The disruption of the carbon and nitrogen cycles affecting people will be least valuable if the results are inconclusive but might possibly be true. Thus, the correct option is B.

What is the Carbon cycle?

The carbon cycle may be defined as the movement of carbon and its derivatives through various biotic and abiotic components of an ecosystem.

The effect of disruption of nutrient cycles will be the least practical and useful if the outcome of it is not conclusive with respect to the deterioration of an ecosystem but might be conceivably true.

It impacts scientific research to a larger extent and allows it to affect the disruption of nutrient cycles in an ecosystem in a significant way.

Therefore, the correct option for this question is B.

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Which of these has not been used as an RNA probe?

a. Fluorescence probes
b. Radioactive probes

c. Non- radioactive
d. Cellular probes​

Answers

Answer:

I think the answer is Cellular Probes.

Explanation:

I hope this helps! Correct me if I am wrong.

Which piece of technology allowed scientists to look for life on Mars?

Answers

The piece of technology that allowed scientists to look for life on Mars is known as the name of the rover.

What is Technology?

Technology may be defined as the application of scientific understanding of the real purposes of human life. It also illustrates the concept or methods used in the manipulation of the human environment for their betterment.

A Rover is typically an instrument that is used to collect life-related information about the dust, soil, liquid components, and even atmospheric air of other planets like Mars.

The complete question is as follows:

Which piece of technology allowed scientists to look for life on Mars?

Telescope RoverMicroscope Probeware

Therefore, the correct option for this question is B.

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Describe several of the factors causing deposition. Based on the timeline, which of the following best describes the event or events leading up to the American Revolution?ans: A combination of related actions and events had a compounding impact. Select the correct answer.Consider the function represented in this table.Xf(x)-1-210-913215Which of these tables could represent the inverse of function f? Ahh Select the correct answer.Which excerpt from the passage best shapes the author's perspective on the misfortunes of the working class?OA. "I watched people's feet from my cellar window, miners' feet in old shoes; soldiers' feet, well shod in government leather,the shoes of women with the heels run down; the dilapidated shoes of children; barefooted boys." (paragraph 16)O B."He was a man with a heart, who perhaps imagined his own mother imprisoned in a cellar with the sewer rats' union."(paragraph 17)OC."If I were out of this dungeon," thought I, "I would be fighting the human sewer rats anyway!" (paragraph 12)"Boys," I said, "go back on your engine. Some day it will be all right." (paragraph 10)OD.ResetNext What was onethe 21stmajor cause of worldwide conflict during the first decade ofcentury?A. Competition between different groups for political power in acountryB. Clashes over how the United Nations should deal with terroristgroupsC. Disagreements over which countries should enforce internationallawD. Struggles between huge alliances made up of dozens of powerfulcountries 1st will make brainliestPeople should consider the impact of drones before buying (and flying) one. Think about where you will fly your drone. Theres a difference between flying in close, tight civilization and the wide-open, vast wilderness. Also, some communities have laws regulating drone use. For example, Florida law requires recreational drones to be registered with the Federal Aviation Administration (FAA). Safety should always be of the utmost concern. Flying away from power lines and keeping a respectable distance from people and wildlife will ensure that no one (or no animal) is harmed should the drone operator mistakenly send it in the wrong direction. Drones of the twenty-first century are the Red Ryders of the 1940s. 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Cul es el costo de un refresco? ayuda porfavor Given that 0.40 mols of NaCl was dissolved in water to create a0.250 m solution, what is the mass of water in grams?. g Which of the following statements about psychological constructs is true?A.Psychological constructs are easy to define and measure.B.Psychological constructs represent concepts that cannot be observed or measured directly.C.Psychological constructs cannot be researched in psychology because they are unobservable.D.Psychological constructs represent measurable overt behavior.Please select the best answer from the choices provided Write a few lines of dialogue based on this narrative. Please help answer this question asap 3/11 correct function combinations to x2-7x-18 GExpress as a percent.4/5% The contribution-margin ratio is: Select one: a. the difference between the selling price and the variable cost per unit. b. unit contribution margin divided by the selling price. c. variable cost per unit divided by the selling price. d. fixed cost per unit divided by variable cost per unit. e. unit contribution margin divided by fixed cost per unit. In Black Boy, Wright describes events that transpire shortly after his father leaves the family.How does Wrights fathers departure affect Wrights mother?She must take on a full-time job and teach her sons to be responsible for themselves.Wrights mother makes light of the situation to keep her children calm.Wrights mother insists her children work to contribute to the household income.She becomes depressed, and her sons suffer due to neglect. How do I solve this problem? Its been awhile since Ive done math C=(2+y)h solve for y