Q: What is the name for compounds that contain only carbon and hydrogen? Choices: - particles - carbohydrates - carbides - hydrocarbons A:
hydrocarbons

Q: What is the name of the life stage when a child becomes sexually mature? Choices: - adolescence - maturity - adulthood - puberty A:
puberty

Q: Q: When the energy of the earthquake reaches shore, it forms a huge wave called? Choices: - a surge - a typhoon - a tidal wave - a tsunami A:
A: a tsunami

Question: Q: What is a measure that has both size and direction? Choices: - length - velocity - wave - vector A:
Answer: vector

*Question*
Q: Endothermic and exothermic reactions differ in whether the products or reactants store more of what? Choices: - Motion energy - Thermal energy - Kinetic Energy - chemical energy A:
**Answer**
chemical energy

Q: Q: What are the gas giants mostly made of . Choices: - calcium and helium - nitrogen and helium - hydrogen and carbon - hydrogen and helium A:
A: hydrogen and helium