Answer:
The decay of potassium to argon, uranium to lead, and one isotope of lead to another are some common yardsticks used to date very old rocks. These dating methods allow scientists to put real ages on rocks with astonishing accuracy.
Explanation:
The best estimate for Earth's age is based on radiometric dating of fragments from the Canyon Diablo iron meteorite. From the fragments, scientists calculated the relative abundances of elements that formed as radioactive uranium decayed over billions of years.
describe what life might have been like millions of years ago. what evidence is there for this?
Answer:
The oldest dated zircons date from about 4,400 million years ago. Earth was initially molten due to extreme volcanism and frequent collisions with other bodies. Eventually, the outer layer of the planet cooled to form a solid crust when water began accumulating in the atmosphere.
In millions of year planet's surface resemble lava and after that earth, cools and earliest zircons are dated around 4,400 million years ago
What was life has been millions of years ago?Our planet's surface resembled a ball of molten lava and fire millions of years ago. Different terrains were being created as a result of the space rocks and other debris colliding with the earth.
The planet was likely made almost completely of molten lava at first since it was so hot. The earth cooled over a few hundred million years and seas of liquid water developed.
The earliest zircons that have been dated are from around 4,400 million years ago. Due to intense volcanism and frequent collisions with other bodies, the earth was first molten.
Therefore planet's lava surface becomes cool millions of years ago to form life.
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To function on their own, what must unicellular organisms do?
Question 2 options:
perform a specialized task
do all jobs for survival
make tissues
work with other cells
Answer:
D
Explanation:
D
Is the placement of the male and female gametes that important
Answer:
nah, its a place to get free answers ad you just got a free answer lol!
Explanation:
Answer:
Yes
Explanation:
hypothesis: what causes an object to slow down after no longer being pushed? answer: friction
based on your hypothesis, circle all surfaces that will cause a moving cart to slow down after the fan is turned off.
(select all that apply)
No Friction Metal Cement Wood
help, i will select brainliest to the best answer. 50 points..
Which statement best describes the concern scientists have about the carbon cycle?
A. The environment is adding carbon faster than humans are adding carbon.
B. The environment is adding carbon slower than humans are adding carbon.
C. Humans are adding carbon faster than the environment can take up and store carbon.
D. Humans are adding carbon slower than the environment can take up and store carbon. Talent
Answer:
C, Humans are adding carbon faster than the environment can take up and store carbon.
Explanation:
The other answer choices don’t make sense. Humans are impacting the carbon footprint at a much quicker rate & far more heavily so than other organisms. Hope this is correct & helps you out:)
The statement that best describes the concern scientists have about the carbon cycle is : ( C ) Humans are adding carbon faster than the environment can take up and store carbon.
The increase in the rate of industrialization globally has caused a tremendous increase in the rate of fossil fuels been burnt and the increase of gas flaring activities during oil exploration.
The increased burning of fossil fuels adds Carbon more rapidly into the atmosphere than the amount of carbon leaving the atmosphere into carbon deposits.
Hence we can conclude that The statement that best describes the concern scientists have about the carbon cycle is : ( C ) Humans are adding carbon faster than the environment can take up and store carbon.
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BRAINLIST What causes air to move towards the water from the land during the night?
-
The dry air over the land is heavier than the air over the water that contains more water vapor.
The ground retains the heat from the Sun longer than the water.
The ground cools faster at night than the water which retains its heat warming the air above at.
Gravity moves the air towards the water because water is lower than the land.
Answer:At night, the roles reverse. The air over the ocean is now warmer than the air over the land. The land loses heat quickly after the sun goes down and the air above it cools too. ... This causes the low surface pressure to shift to over the ocean during the night and the high surface pressure to move over the land.
Explanation:The ground cools faster at night than the water wich retains its heat warming the air above at
DNA is a long molecule made of monomers called
A. purines
B. sugars.
C. pyrimidines.
D.nucleotides.
Answer: D. nucleotides
Explanation:
Please help!
1. All organisms need glucose or a source of ___ carry out basic life functions.
2. Many plants obtain glucose through the process of ___.
3. Animals obtain glucose from ___.
4. Photosynthesizing organisms use ___ to produce glucose.
5. The reactants of photosynthesis are ___ and ___.
6. The products of photosynthesis are ___ and ___.
( answer choices: radiant energy, water, chloroplast, chlorophyll, oxygen, glucose, carbon dioxide, photosynthesis)
Which process transfers pollen from the male reproductive structures to the female reproductive structures?
fertilization
pollination
seed dispersal
vascular transport
Answer:
that would be the second option, pollination
Explanation:
The transfer of pollen from the male reproductive structure to the female reproductive structure is called pollination.
hope dis helps ^-^
What is the fossil connection between Indohyus and the whale? What is the function of this bone? Why do you think these mammals transitioned from land to water?
Answer:
1. Indohyus is an extinct genus of digitigrade artiodactyls known from Eocene fossils in Asia. This small chevrotain-like animal found in the Himalayas is one of the earliest known non-cetacean ancestors of whales.
2. While whale bones are real bones, they are apparantly a little "spongier" and less stiff than most land animal bones. Afterall, the bones don't have to hold the animal up. They just have to help it keep its shape while floating in what is pretty much a zero-G world.
3. I think they transitioned to water because they have to escaped predators so they move into the sea to survive
Explanation:
help me on this question please
Answer:
100x
Explanation:
Diatoms are usually found at a magnification of 100x or 400x
How would you change this setup so that the Shallow sensor does not break but still sends important information? (Remember: We still want it to detection to happen)
Answer:
Many coastal areas of the United States are at risk for tsunamis. After the catastrophic 2004 tsunami in the Indian Ocean, legislation was passed to expand U.S. tsunami warning capabilities. Since then, the nation has made progress in several related areas on both the federal and state levels. At the federal level, NOAA has improved the ability to detect and forecast tsunamis by expanding the sensor network. Other federal and state activities to increase tsunami safety include: improvements to tsunami hazard and evacuation maps for many coastal communities; vulnerability assessments of some coastal populations in several states; and new efforts to increase public awareness of the hazard and how to respond.
Tsunami Warning and Preparedness explores the advances made in tsunami detection and preparedness, and identifies the challenges that still remain. The book describes areas of research and development that would improve tsunami education, preparation, and detection, especially with tsunamis that arrive less than an hour after the triggering event. It asserts that seamless coordination between the two Tsunami Warning Centers and clear communications to local officials and the public could create a timely and effective response to coastal communities facing a pending tsuanami.
According to Tsunami Warning and Preparedness, minimizing future losses to the nation from tsunamis requires persistent progress across the broad spectrum of efforts including: risk assessment, public education, government coordination, detection and forecasting, and warning-center operations. The book also suggests designing effective interagency exercises, using professional emergency-management standards to prepare communities, and prioritizing funding based on tsunami risk.
if this helps please brainliest
What do you know about the Punnett Square? (Don’t research it or you will not get credit for this question.)
Answer:
Well it says not to research so here's a brief definition: A punnet square is a diagram that shows the genotypes of a cross and helps predict the probability of having certain genotypes.
Explanation:
Heres some words to know
-Dominant
-Recessive
-Allele
-Mendel's law of Heredity
Let me know if you want more explanation on these :)
Plz help Sari is studying four different samples of materials. This table shows the mass and volume of the samples.
A 2-column table with 4 rows. The first column labeled sample with entries W, X, Y, Z. The second column labeled measurements with entries no definite shape no definite volume, no definite shape definite volume, no definite shape no definite volume, definite shape definite volume.
Which sample material(s) could be liquid?
W and Y
X
X, W, and Y
Z
When doctors are talking about blood sugar, what they really talking about?
Answer:
They are literally talking about the level of sugar in your blood. In most cases, its for people with diabetes who need to control there blood sugar by controlling the amount of sugar they eat.
Explanation:
How does human respiration contribute to the water cycle?
(please put a real answer)
Answer:
Our breath being absorbed by the atmosphere and dumped back down in the form of rain or snow
How many total atoms are in the compound below? 3C6H12O6
A) 3
B) 24
C) 72
Answer:
3
Explanation:
There are three atoms in a compound. They are carbon, hydrogen, and oxygen.
What is a compound?
A compound will form when different atoms combine and it forms a compound. There are three atoms such as carbon, hydrogen, and oxygen.
When two or more chemical elements are chemically linked together, a compound is created. The components that make up a mixture are not chemically bound to one another.
Covalent bonds and ionic bonds are two prevalent forms of bonding that hold components together in compounds.
Therefore, There are three atoms in a compound. They are carbon, hydrogen, and oxygen.
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place the parts of the human circulatory system in order from highest to lowest degree of internal organization
Answer:
READ ALL OF THIS! Cell, tissue, organ and system.
Explanation:
Cells? Are produced to form tissue and A tissue needs to exist to make up Organs.
the highest level of organization is biosphere, It encompasses all of the others.
Please tell me if i'm correct!
Which of the following method used to separate two miscible liquids?
a) Separating funnel
b) Sieving
c) Winnowing
d) Sublimation
Answer:
The answer is distillation but i quess it's not on the list so I think it is a) Separating Funnels
Explanation:
I think it's because your separating two miscible liquids
I NEED HELP NOW. ASAP
Scientists have been studying four populations in the ocean near Alaska. In the ocean, sharks eat sea otters, and both sea otters and sea stars eat clams (a type of shellfish).
The data shows that recently the shark population increased. How will the increase in the shark population affect the other populations? Be sure to explain whether the sea otter population, the sea star population, and the clam population will change, and why.
hypothesis: what causes an object to slow down after no longer being pushed? answer: friction
based on your hypothesis, circle all surfaces that will cause a moving cart to slow down after the fan is turned off.
(select all that apply)
No Friction Metal Cement Wood
help, i will select brainliest to the best answer. 50 points...
THE RIGHT ONE QWIAEJKNF
Answer: no friction, metal
Explanation: yes
Friction causes an object to slow down after no longer being pushed.
What do you mean by friction?Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction: Dry friction is a force that opposes the relative lateral motion of two solid surfaces in contact.
Friction depends on the roughness or the smoothness of the surface which is in contact with the object. If the surface of either object is smooth, then the force of friction will be less.
Walking – When we walk on the ground or the floor, it is the frictional force that is responsible for holding our feet to the ground. On slippery surfaces or ice, the friction present is less, which is why we tend to slip on these surfaces.
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The levels of organization within an organism are __________, molecule, cell, __________, organ, and organ system.
atom; tissue A
compound; kidney B
element; limb C
nucleus; membrane D
Answer:
I'm pretty sure it A but I could be wrong.
Explanation:
When new scientific data is presented, other scientists ask questions to clarify their understanding of the data. If you were to interview the scientist whose research resulted in these two graphs, what questions would you ask to help clarify the evidence shown? List at least two questions.
Answer:
What do you think are your most significant research accomplishments?
What did it change about the way people approach the field?
What has been your role so far in developing research ideas and carrying them forward?
Answer:
What natural forces were considered in this experiment?
Did human activity look only at fossil fuel use, or did it consider other factors?
What causes the yearly fluctuations in global temperature?
Explanation:
from edmentum
What is the landform in the diagram?
Cirque
moraine
kettle
arete
in multicellular organisms there are diffrent kinds of cells that are orgaized into tissues to preform special funtions what is the function of a nerve cell
Answer:
to transfer any touch to the brain
Explanation:
the nerves in your body are responsible for sending signals to the brain so it can decipher what you are touching and how to react. Ex: when you touch something very hot, the nerves send the signal to the brain, then the brain knows it something very hot, then sends a signal to the body part that touched that super hot thing and is like "GET OFF THAT! IT'S GOING TO HURT YOU IF YOU KEEP TOUCHING THAT" have a great day/night and good luck!
How do the molecules in your body affect the energy released in the cells?
Explanation:
When the chemical bonds of the glucose molecule are broken, energy is released. The cell is able to store that energy in the chemical bonds of a special molecule called adenosine triphosphate or ATP. The energy stored in ATP can be used by the cell to do various kinds of work.
A seed company in Mississippi produces genetically modified cotton
seeds. What are some advantages to using genetically modified crops?
A. resistance to pests
B. increased crop production
C. resistance to extreme weather
D. all of these
All of the following statement explains why nuclear reactors considered nonrenewable resource except:
Nuclear reactors require minerals that need to be mined.
Nuclear reactors can only be used for limited amount of time.
Nuclear reactors require uranium to start.
Nuclear reactors can be recycled.
ILL GIVE BRAINLEIST
Answer:
a
Explanation:
Answer:
That’s confusing
Explanation:
explain how evolution accounts for diversity of living things
Answer:
Evolution accounts for the unity and diversity of living things through adaptation. Unity comes from the adaptation and similarities that all organisms share which is DNA, while diversity comes from descent with modification or natural selection.
