Input: Answer this question:
The surface of Earth is constantly changing. Which of these findings provides the best evidence that the crustal surface of Earth has changed over time?
Answer: Marine fossils are found in mountain areas.
Input: Answer this question:
Hydrochloric acid is added to a beaker containing a piece of zinc. As a result, zinc chloride is formed and hydrogen gas is released. This is an example of
Answer: a chemical reaction
Input: Answer this question:
Which nongaseous compound can be made from two elements that are gases at room temperature?
Answer: water
Input: Answer this question:
Why is it winter in North America when it is summer in South America?
Answer:
North America receives less direct sunlight during the winter.