What happens to the volume of solids liquids and gases when they cool? Solids- stays the same Liquids- stays the same Gases- decreases You can use the formula PV/T=P2V2/T2 P=initial pressure V=initial volume T=initial temp P2=final â¦pressure V2=final volume T2=final temp (MORE) 2 people found this useful.
Active transport requires the use of energy or ATP. In active transport you go against the concentration gradient, and for that ATP is used. Their are two types of active transport. Primary and secondary active transports and both use ATP, thou secondary uses less ATP than primary. Passive transport does not use any ATP.
Transporting substances across the plasma membrane can require that the cell use some of its energy. If energy is used, the transport is called active. If molecules can pass through the plasma membrane without using energy, the molecules are using passive transport. Helping the molecules across: Active transport