Which metric unit is used to describe an object's length?
A: centimeter (cm)

When a student uses the equation, mass multiplied by change in temperature multiplied by specific heat, what is being calculated? q = m \times C \times \Delta T
A: heat gain or heat loss

Plants need iron to grow. What parts of plants take in iron?
A: roots

What keeps Mars in orbit around the Sun?
A:
gravity