Bi-Weekly Quiz #1 Review

The freezing point of a substance is the temperature at which the substance changes from...

• gas to liquid

• gas to solid

• liquid to gas

• liquid to solid

Which item is too small to be seen with a compound microscope?

• an atom of iron

• a grain of salt

• an onion cell

• a human hair

Which force causes a satellite to remain in orbit?

• magnetism

• gravity

• electricity

• friction

The energy required for organisms to respond to the environment comes from

• vitamins

• minerals

• water

• food