Why is carbon used to date things that were once living? O A. The half-life of carbon depends on age.
B. The amount of carbon is easy to measure.
C. Living things take in carbon from food.
D. Carbon is not toxic to living things.

Which statement accurately describes the relationship between air pressure, air density, or altitude? as altitude increases, pressure increases. as altitude increases, air density increases. air pressure and density are lowest at sea level. denser air exerts more pressure than less dense air.

Why is the bottom layer of a trophic pyrimid the

What energy conversion occurs when a sling shot is used to shoot a rock across the room? (2 points) question 2 options: 1) stored mechanical energy is converted to mechanical energy. 2) stored mechanical energy is converted to radiant energy. 3) gravitational energy is converted to radiant energy. 4) gravitational energy is converted to mechanical energy.