Q: How much space a surface covers is known as what? Choices: - Flatness - Lenght - Height - area A:
area

Q: What kind of light ranges from red to violet? Choices: - infrared light - x rays - ultraviolet light - visible light A:
visible light

Q: Q: What term in physics refers to the use of force to move an object? Choices: - mass - momentum - velocity - work A:
A: work

Question: Q: The entropy change is positive as the solid state changes into which state? Choices: - mixture - gas - chemical - liquid A:
Answer: liquid

*Question*
Q: What events, resulting in death of over half of animal species, have occurred on earth at least five times in the past 540 million years? Choices: - mass migrations - microevolutions - spontaneous mutations - mass extinctions A:
**Answer**
mass extinctions

(Question)
Q: What part of the atmosphere is the heat source? Choices: - troposphere - magnetosphere - ionosphere - stratosphere A:
(Answer)
stratosphere