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?
OPTIONS:
- Some rock layers are very thick.
- Some species have become extinct.
- Marine fossils are found in mountain areas.
- Igneous rock is found on all tectonic plates.
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
OPTIONS:
- a chemical reaction
- a physical change
- photosynthesis
- evaporation
Answer: a chemical reaction
Input: Answer this question:
Which nongaseous compound can be made from two elements that are gases at room temperature?
OPTIONS:
- water
- table salt
- iron oxide
- carbon dioxide
Answer: water
Input: Answer this question:
Why is it winter in North America when it is summer in South America?
OPTIONS:
- The south is always warmer than the north.
- There is less land than water in the south.
- North America receives less direct sunlight during the winter.
- When it is December in North America, it is June in South America.
Answer:
North America receives less direct sunlight during the winter.