Which statements best describe the fossil record? Check all that apply.
The fossil record is a complete history of all the organisms that have lived on Earth.
The fossil record shows which organisms have a common ancestor.
The fossil record can be used to develop a timeline of Earth’s history.
The fossil record shows which organisms existed at the same time.
The fossil record shows that fossils in lower rock layers are younger than fossils in higher rock layers.

Consider the motion of the balloon and its air contents in terms of momentum. in step 1 above, the total momentum of the balloon and its contents was zero. recall that momentum = mv. both the balloon and the air inside it had a velocity of zero and therefore the total momentum was zero. now think about what happened when the air escaped from the balloon. a certain mass of air accelerated in one direction. in order to keep the total momentum of the system zero, the balloon itself (which has mass) had to accelerate in the opposite direction. use this scenario to you explain why the soda can rotates when the water squirts out of the escape holes. what was your hypothesis concerning the water-filled can? according to your data, do you think your hypothesis was correct? (be sure to refer to your data when answering this question.) summarize any difficulties or problems you had in performing the experiment that might have affected the results. describe how you might change the procedure to avoid these problems. give at least one more example of newton's third law in everyday life.

When rutherford performed his metal foil experiment, he was surprised that most of the alpha particles

Which of these would most likely be a stimulus that would cause the body to initiate feedback mechanisms a.) normal body temperature in an arctic environment b.) normal boy temperature in a tropical environment c.)light physical activity d.)low blood sugar