The measure of mass of a substance per unit volume.

The amount of heat needed to raise the temperature of one gram of a substance by one degree Celsius.

Water vapor given off by plant photosynthesis.

The continuous movement of water from the ocean to the atmosphere to the land and back to the ocean.

The force that acts on the particles at the surface of a material.

The process that moves water through a narrow porous space.

Uneven distribution of charges across a molecule.

The ability of a fluid to exert an upward force on an object that is immersed in the fluid.

The process of warm air cooling as it rises and releasing moisture in the form of a liquid.

The rain, snow, sleet or hail that falls from clouds onto the Earth’s land and oceans

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