HELP MY SISTER WILL KILL ME! Warm air rising at the equator and cold air sinking at the poles is one reason for which type of movement of air?

conduction

radiation

convection currents

earth's rotation

The oxidizing agent our bodies use to obtain energy from food is oxygen (from the air). if you breathe 15 times a minute (at rest), taking in and exhaling 0.5 l of air with each breath, what volume of air do you breathe each day? air is 21% oxygen by volume. what volume of oxygen do you breathe each day?

As a result of wildfires, in grasslands. a) tree growth increases b) grass growth increases c) soil quality decreases d) invertebrate variety decreases

What maintain homeostasis when a persons internal body temperature is 97.5°f