question: Write a question you would see in a school textbook.
answer: A class is testing the effect of exercise on heart rate. The heart rate of two students before exercise is compared to their heart rate after running around a track. Which procedure will most likely help the class correctly compare the results of the two students?

question: Write a question you would see in a school textbook.
answer: One example of matter is

question: Write a question you would see in a school textbook.
answer:
Dust and ash entering the atmosphere as a result of volcanic eruptions can affect Earth's