In the night sky, stars often look like a multitude of bright lights barely distinguishable from one another. But the fact is that stars vary greatly. The differences are difficult to see from far away. Can you guess the ways in which stars differ from one another? And what do they have in common?
Answer:
The correct answer is -
differences: color, brightness, temperature, size, and mass
similarities: They are balls of gas, mostly hydrogen and helium
Explanation:
Stars look mostly the same from anywhere or any place and tough to differentiate or distinguish one from another. Star can be different on the various ground even they look similar from far away.
Stars can be of various colors from red to blue and brightness can be different as well, color depends on temperature, and brightness depends on the size of the star.
Stars are grouped by the size that ranges from dwarf to supergiant. The temperature of the stars also varies which affects the color and brightness as well.
Stars are the big balls of gases composed of mainly helium and hydrogen all are always under a nuclear reaction.
Answer:
Stars have different masses and sizes. They are composed of different mixtures of elements. All stars, however, are powered by nuclear fusion and have a limited life-span.
Explanation:
Soil generation and soil conservation are equally effective agricultural strategies.
Please select the best answer from the choices provided
x T
✓ F
The answer is B. False
Answer:
False
Explanation:
Soil generation and soil conservation are equally effective agricultural strategies. The statement is false.
What is soil ?
The soil is nothing but a mixture that contains minerals, organic matter, and living organisms, it is a loose sediment. Moreover, there are different types of soil such as Clay Soil, Sandy soil, Loamy Soil, Silt Soil
soil composed of 45% minerals, 50% spaces or voids and 5% organic matter, it performs many important functions such as Providing a growth medium for the plants, Acts a modifier of the earth’s atmosphere and it is One of the most crucial components of the biosphere
The formation of soil occur by weathering of rocks. the weathering of Solid rock can weather occur in three way such as Mechanical Weathering, Chemical Weathering, Biological Weathering
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What is biology? What dose it mean to the world
Answer:
The word biology is derived from the greek words /bios/ meaning /life/ and /logos/ meaning /study/ and is defined as the science of life and living organisms.
Explanation:
Define/Explain what is a System and What are the Interacting Components of a system?
Answer: A system is a group of interacting or interrelated entities that form a unified whole. ... A system, surrounded and influenced by its environment, is described by its boundaries, structure and purpose and expressed in its functioning. Systems are the subjects of study of systems theory.
Explanation:
Write a paragraph about trains that were made in 1800's.
Answer:
This significant aspect of the design was transferred to later locomotives. Railways were made out of cast-iron until the 1800s. Cast iron was sadly susceptible to corrosion and it was weak, often causing it to collapse under stress. John Birkinshaw invented a more robust material, wrought iron, in 1820.
Explanation:
A hypothesis is
A.
a summary of events written in a particular fashion.
B.
a statement that proposes a possible explanation to some phenomenon or event.
C.
the process of experimentation designed specifically to disprove a scientific theory.
D.
the result of a scientific experiment performed for the purpose of proving a theory.
Answer:
B
Explanation:
Which reason best explains why living things need carbon
Answer:
Its ability to form polymers makes it an ideal partner for molecules that generate life. Carbon is a key chemical element for life and the natural processes that take place on earth.
In what type of location do approximately three-fourths of all structure fires occur?
In this chromatographic experiment, the solvent traveled 6 centimeters. For each band, calculate the Rf value and find the corresponding pigment.
Standard Rf values for pigments: Chlorophyll a 0.60 Chlorophyll b 0.50 Carotene 0.98 Xanthophyll 2 0.15
Answer:
A = 1.2/6 = 0.20 Xanthophyll 2
B = 2.8/6 = 0.47 Chorophyll b
C = 3.5/6 = 0.58 Chlorophyll a
D = 5.8/6 = 0.97 Carotene
Explanation:
Which of the following does NOT affect earth’s season
Answer:
which of the following???????
What do all living organisms have in common?
Answer:
All living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing.
Explanation:
Which biomolecule determines a person's ability to clot blood properly?
A- Glycogen
B- Lipids
C-Carbohydrates
D- Nucleic Acids
Answer:
D- Nucleic Acids
Explanation:
Blood clotting is a process whereby a person's blood coagulates due to the formation of a white fibrous protein substance called FIBRIN. The essence of blood clotting is to prevent excessive flow/waste of blood when a blood vessel is wounded.
However, certain substances are needed for this process of blood clotting to occur in our body. Some individuals lack this substances and hence bleed continuously during injury, a condition known as HEMORRHAGE. The substances such as FIBRIN, a protein needed for blood clotting is encoded by GENES which makes up DNA (a type of nucleic acid).
Therefore, NUCLEIC ACID biomolecules determines a person's ability to clot blood properly because nucleic acids make up DNA, which contains segments (genes) that encode the synthesis of proteins (fibrin) needed for blood clotting to occur. Hence, it all boils down to NUCLEIC ACIDS.
what is the closest star to us besides the sun?
Some silverware is made with the element silver (Ag). Over time, this silverware will turn black (tarnish) if it is not cleaned with a special solution. Why is this a chemical change?
Answer:
The tarnish is actually the result of a chemical reaction between the silver and sulfur-containing substances in the air. The silver is actually combining with sulfur and forming silver sulfide. Silver sulfide is black. When a thin coating of silver sulfide forms on the surface of silver, it darkens the silver. That’s what we call ‘tarnish.’
Which number belongs in the space labeled X?
A) 5
B) 7
C) 8
D) 10
How does Rutherford’s model of the atom compare with Thomson’s model? They both describe atoms as small, indivisible spheres. They both describe electrons as moving around the nucleus. They both describe electrons as being surrounded by the positive matter. They both describe atoms as being made up of positive and negative matter.
Answer:
They both describe atoms as being made up of positive and negative matter.
Explanation:
Both Rutherford and Thomson's model both describe atoms as being made up of positive and negative matter. The correct option is D.
What is an atom?An atom is a matter particle that truly represents a chemical element. An atom is made up of a central nucleus encased by one or more electrons. Each electron carries a negative charge.
Thomson's plum pudding the atom model contained negatively charged electrons within a positively charged "soup."
The gold foil experiment by Rutherford demonstrated that the atom is mostly empty space with a tiny, dense, positively charged nucleus. Rutherford proposed the nuclear model of the atom based on these findings.
Thus, the correct option is D.
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Christina is so excited about her wedding that she tells her coworker Meredith it is exactly 43,200 minutes away. Help Meredith figure out how many days away the wedding is so that she can add it to her calendar.
Answer:
The correct answer would be - 30 days.
Explanation:
Given:
Time to go for the marriage - 43,200 minutes
Solution:
we know:
1 hour - 60 minutes
1 day - 24 hours - 60 * 24 = 1440 minutes
so the days in the 43200 minutes would be -
43200/1440 = 30 days.
Thus, the correct answer would be - 30 days.
HELP PLEASE!!
Question 2 (20 points)
A scientist is examining slides of cells from organisms in different groups. What two
features would the scientist use to distinguish a plant cell from an animal cell?
A•presence or absence of mitochondria
B•presence or absence of a cell wall and chloroplasts
C•presence or absence of a nucleus and cell membrane
D•presence or absence of a cell membrane and cytoplasm
The two features would the scientist use to distinguish a plant cell from an animal cell are the presence or absence of a cell wall and chloroplasts. Thus option B is correct.
what is function of chloroplast ?Chloroplasts are the membrane bound organelle present only in photosynthetic organism like plants and algae; They are located in mesophyll cells of leaves and have a high concentration of chlorophyll pigment which absorb sunlight and absent in animal cell.
Chloroplast has extra-nuclear DNA, these are semiautonomous in nature; They synthesize food that is glucose by the process of photosynthesis by absorbing sunlight into chemical energy.
It is major house which involve in the production of NADPH and molecular oxygen (O2) released by the photolysis of water; It also produces ATP from photosynthesis.
It also indirectly participate in generation of carbon and sugar molecule during the Calvin Cycle or dark reaction of photosynthesis.
Thus option B is correct.
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which statement about water best illustrates the property of adehsion
Which regions on Earth show the greatest number of species in decline?
Oceania, South America, and Southeast Asia.
It currently accounts for the majority of recent extinctions. More species than we can count have perished as a result of deforestation. Our forests support entire ecosystems. If we do not stop deforestation, it is anticipated that all of our rainforest will vanish over the next 100 years.
What regions on Earth show a number of species in decline?With 3,330 species at risk across 10 countries, Asia has the highest concentration of endangered species of any continent. Sadly, the United States, which ranks sixth, is also in the top 10.
The majority of the endangered species are found on the continent of Asia. More than 2,100 native Asian species have been classified as “endangered.”
Therefore, Oceania, South America, and Southeast Asia regions on Earth show the greatest number of species in decline.
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What characteristic of life is demonstrated when a light in a room is turned off and the pupils of your eyes
dilate or get bigger/wider?
Answer:
Dilate
Explanation:
I'm pretty sure is the proper word it's pretty much the same as bigger/wider. I might be wrong I think 70% I might be correct.
BRAINLIEST what bird can fly backwards
Answer:
A humming bird is the only bird that can fly backwards
Explanation:
what are the disadvantages of adding calcium oxide to fish pond
Answer:
it causes the rapid increase in PH which may harmful for the for fishes and other aquatic lives.
Explanation:
There are a lot of materials which are used to neutralize the acidity of soil.some examples of such materials are slacked lime, quick lime, and liquid lime etc. Lime increases the PH and the concentration of calcium which helps in removal of phosphate from water. Raising PH also cause to remove the carbon dioxide from the water. But keep in mind that rapid increase in PH is harmful for the fishes.calcium oxide also causes the rapid increase in Ph therefore, it is not advisable to use in fishpond.
what is a genotype for RR rr
What is, neglecting your health by eating poorly is considered? A a controllable risk factor B an uncontrollable risk factor C a long-term benefit of fitness D a temporary setback
Answer:
A
Explanation:
If 2 atoms of gold have the same properties, does an electron have the same properties of gold
Place mercury in the reactor. After a large amount of work, only a tiny portion of gold is created.
Decontaminate the resulting gold. This is harder than it sounds because you can't separate out non-radioactive gold from radioactive gold using purely chemical methods.
It should be obvious from this process that it currently costs much more money to create non-radioactive gold than you could ever earn by selling the gold. Creating gold from other elements is currently an expensive laboratory experiment and not a viable commercial activity. Perhaps technology will improve enough in the future to make creation of gold in nuclear reactors a profitable economic enterprise.
Science- I need help this is due by the end of the the day PLEASE.............:)
Answer:
22 5mL 6mL 7mL 23mL 24ML
Answer:
21.5mL
hope this helps;)
Which are characteristics of a prokaryotic cell?
Are there answer choices that I can choose from?
Answer:
A.C.F :)
Explanation:
contains dna, contains ribosomes, and lacks a nucleus
What type of cells did Theodore Schwann study?
Answer:
peripheral nerve cells
Explanation:
in doing so he discovered a new type of cell surrounding the axons and neurons of nerve fibers – the cells he discovered are now called Schwann cells.
Describe The Phenomenon
Answer:
Phenomenon is a fact or situation that is observed to exist or happen, especially one whose cause or explanation is in question.
It is observable fact or event
