Q: In machines that increase force, such as ramps and doorknobs and nutcrackers, what is the relation between output and input force? Choices: - drop is greater - output is smaller - input is greater - output is greater A:
output is greater

Q: Each cell and every living thing requires what? Choices: - potassium - calcium - salt - energy A:
energy

Q: Q: What paired organs help regulate blood pressure through sodium ion and water retention and loss? Choices: - lungs - tissues - lymph nodes - kidneys A:
A: kidneys

Question: Q: What is the term for matter that does not let any light pass through it, whether it absorbs light, reflects light, or does both? Choices: - devoid - obscene - artificial - opaque A:
Answer: opaque

*Question*
Q: Where do polychaetes live? Choices: - the tundra - great plains - lakes - ocean floor A:
**Answer**
ocean floor

Q: Body waves travel through the earth and arrive at seismograms before what? Choices: - sound waves - velocity waves - function waves - surface waves A:
surface waves