Q: Which piece of lab equipment is necessary to determine the mass of 2 teaspoons of sand?
A: balance
Q: Which function makes a plant cell different from an animal cell?
A: ability to convert sunlight into energy
Q: What precaution must be taken by students when making observations of the Sun?
A: Project image onto a piece of cardboard.
Q: How do scientists know that some mountains were once at the bottom of an ocean?
A:
Marine fossils have been found on the peaks of some mountains.