Ques:Q: An electrical motor changes electrical energy into what? Choices: - chemical energy - solar energy - thermal energy - mechanical energy A:

Ans:mechanical energy
-----
Ques:Q: Which form of digestion is a purely physical process that does not change the chemical nature of the food? Choices: - slow - simple - electromagnetic - mechanical A:

Ans:mechanical
-----
Ques:Q: How does the liquid in a thermometer respond to heat or cold? Choices: - freezes or boils - disappears - rises or vaporizes - expands or contracts A:

Ans:expands or contracts
-----
Ques:Q: A penguin must do what before molting? Choices: - hibernate - use muscle mass - mate - increase muscle mass A:

Ans:
increase muscle mass
-----