Q: What are chemical messengers that control sexual development and reproduction? Choices: - lipids - proteins - neurotransmitters - sex hormones A:
sex hormones

Q: What force opposes a motion of a moving body? for example a car breaking on a road. Choices: - tension - vibration - thermal - friction A:
friction

Q: Q: What phenomenon occurs when strong winds blow surface water away from shore, allowing deeper water to flow to the surface and take its place? Choices: - percolating - hurricane - tsunami - upwelling A:
A: upwelling

Question: Q: What kind of muscle is responsible for making the human heart beat? Choices: - deltoid - teres minor - respiratory muscle - cardiac muscle A:
Answer: cardiac muscle

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

Q: Q: What do you call a substance that cannot be broken down to other substances by chemical reactions.? Choices: - a participate - a molecule - a compound - an element A:
A: an element