Q: Where does electric power originate? Choices: - the Sun - magnets - coal mines - power plants A:
power plants

Q: Aids is an infectious disease of which system? Choices: - muscular - digestion - endocrine - immune A:
immune

Q: Q: What is the rotational equivalent of a force? Choices: - momentum - power - centripetal force - torque A:
A: torque

Question: Q: The transmitted light strikes a photoelectric tube, which converts the light energy to? Choices: - heat - color - gas - electricity A:
Answer: electricity

*Question*
Q: Digestive enzymes secreted in the acidic environment (low ph) of the stomach help break down what? Choices: - molecules - particles - cells - proteins A:
**Answer**
proteins

Q: What refers to a group of individual organisms of the same species that live closely together? Choices: - a enviroment - a flock - a habitat - a colony A:
a colony