*Question*
Q: What is the term for a process that changes some chemical substances into others? Choices: - acid reaction - toxic reaction - chain reaction - chemical reaction A:
**Answer**
chemical reaction

*Question*
Q: What do you call the patterns and groups of stars in the sky that ancient people observed and made stories about? Choices: - planets - meteors - asteroid fields - constellations A:
**Answer**
constellations

*Question*
Q: What can be used to accelerate the rate at which chemical reactions occur? Choices: - hormones - protein - components - enzymes A:
**Answer**
enzymes

*Question*
Q: Drilling wells into hot rocks to release hot water or steam is an example of what kind of power plant? Choices: - hydroelectric - solar - fossil fuel - geothermal A:
**Answer**
geothermal