Ques: Q: Unlike energy, what happens to matter in ecosystems? Choices: - it is filtered - it does not exist - it is destroyed - it is recycled A:
Ans: it is recycled

Ques: Q: What is the force of attraction between things that have mass Choices: - friction - motion - momentum - gravity A:
Ans: gravity

Ques: Q: All elements are most stable when their outermost shell is filled with electrons according to which rule? Choices: - quartet rule - string rule - coupling rule - octet rule A:
Ans: octet rule

Ques: Q: How much unpolarized light does a polarized filter block? Choices: - 40 % - 60 % - 100% - 50% A:
Ans:
50%