Q: When a wave travels down a string, the string vibrates up and down at right angles to the wave's what? Choices: - frequency - pressure - gravity - direction A:
direction

Q: What causes natural ripening in fruit? Choices: - sulfur - chloride - acid - ethylene A:
ethylene

Q: Q: All chemical reactions require what to get started? Choices: - conductivity energy - spiked energy - primary energy - activation energy A:
A: activation energy

Question: Q: What does the coefficient in front of an element in a formula indicate? Choices: - number of atoms - place on the Periodic Table - time of the reaction - how much is involved in the reaction A:
Answer: how much is involved in the reaction

*Question*
Q: The process of getting oxygen into the body and releasing carbon dioxide is called? Choices: - osmosis - persperation - precipitation - respiration A:
**Answer**
respiration

(Question)
Q: What was first discovered in songbirds that produce new neurons while learning songs? Choices: - proteins - Brain Cord - homeostasis - neurogenesis A:
(Answer)
neurogenesis