Answer:
Approximately 4.6 billion years ago, the solar system was a cloud of dust and gas known as a solar nebula. Gravity collapsed the material in on itself as it began to spin, forming the sun in the center of the nebula. With the rise of the sun, the remaining material began to clump up.
Explanation:
In geology, a key bed (syn marker bed) is a relatively thin layer of sedimentary
rock that is readily recognized on the basis of either its distinct
physical characteristics or fossil content and can be mapped over a very
large geographic area.[1]
As a result, a key bed is useful for correlating sequences of
sedimentary rocks over a large area. Typically, key beds were created as
the result of either instantaneous events or (geologically speaking)
very short episodes of the widespread deposition of a specific types of sediment. As the result, key beds often can be used for both mapping and correlating sedimentary rocks and dating them. Volcanic ash beds ( and bentonite beds) and impact spherule beds, and specific megaturbidites
are types of key beds created by instantaneous events. The widespread
accumulation of distinctive sediments over a geologically short period
of time have created key beds in the form of peat beds, coal beds, shell beds, marine bands, black in cyclothems, and oil shales. A well-known example of a key bed is the global layer of iridium-rich impact ejecta that marks the Cretaceous–Paleogene boundary (K–T boundary). Please let me know if it works.
Answer:
Explanation:
years ago. Homeostasis ensures that cells can obtain and use energy, make new cells, . biology biology active answer key chapter 5 5 reading work homeostasis and cell.
There are 5 steps of the scientific method:
1. Make an observation.
2. Form a question.
3. Form a hypothesis.
4. Conduct and experiment.
5. Analyze data and draw a conclusion.
Based off this problem:
1. It doesn't specifically say that an observation was made but since it says she's studying it, it may count as an observation???
2. No question is asked because it doesn't say that she is wanting to know what the effects are of sleep deprivation for twelfth graders during midterms.
3. There is no hypothesis stated because she is not making a prediction on the outcome.
4. I suppose the data collected that she turned in was the experiment so I'm pretty sure she did conduct the experiment.
5. She just turned in her data but no analysis or conclusion is said to be made.
Without further ado, it seems that three steps were actually left out but if I had to choose, I believe that steps 3 and 5 were left out but I may be wrong. Sorry I couldn't provide a direct answer but I hope my thought process is helpful.<span />
b. the burning of fossil fuels for energy and transportation
