How many asteroids (that we know of) are on a potential collision course with earth?
25 - 50
300 - 500
10,000+
0 - 5

Heena wants to measure the volume of a ball that is 24 cm across. how should she set up her equation?

If a substance is in the gas phase, which of qualities of the gas will stay constant? a: volume b: mass c: shape d: position of particles

Hydrogen and helium are both members of?