Q: What do vectors possess that scalars do not? Choices: - height and polarity - direction and texture - magnitude and weight - magnitude and direction A:
magnitude and direction

Q: Organelles whose membranes are specialized for aerobic respiration are called what? Choices: - vacuoles - mitosis - chloroplasts - mitochondria A:
mitochondria

Q: Q: Where are the oceans most polluted? Choices: - in warmer waters - on the ocean floor - along reefs - along coasts A:
A: along coasts

Question: Q: While in the lungs, blood gives up carbon dioxide and picks up what element before returning to the heart? Choices: - nitrogen - methane - hydrogen - oxygen A:
Answer: oxygen

*Question*
Q: The rate at which an unstable isotope decays is measured in a unit known as what? Choices: - full-life - staying-life - half-time - half-life A:
**Answer**
half-life

(Question)
Q: What alloy is made from copper and zinc? Choices: - iron - stele - manganate - brass A:
(Answer)
brass