Q: How many forces do objects on earth have acting on them at all times? Choices: - ten - three - four - two A:
two

Q: Gradual degradation of a material due to its exposure to the environment is known as what? Choices: - metabolism - erosion - destruction - corrosion A:
corrosion

Q: Q: One of the fundamental laws of chemistry deals with the fact that we cannot create or destroy what? Choices: - time - protein - stars - matter A:
A: matter

Question: Q: Birds are thought to have evolved around 150 million years ago from what? Choices: - teradactils - raptor dinosaurs - parrot dinosaurs - theropod dinosaurs A:
Answer: theropod dinosaurs

*Question*
Q: What is the wavelength of light expressed in? Choices: - nanoseconds - millimeters - vatts - nanometers (nm) A:
**Answer**
nanometers (nm)

(Question)
Q: What are angiosperms most important function to humans? Choices: - oxygen production - gasoline - water filtration - food A:
(Answer)
food