Vocabulary

=Vocabulary=

** absorb ** - to take in or soak up **atmoshpere**  - layer of air that surrounds Earth **cloud** - mass of tiny water droplets or ice crystals in the air **liquid** **-** the state of matter that has a definite volume but no definite shape. ** ocean ** - large body of salt water that covers almost three-fourths of Earth; the world ocean is divided into the Pacific, Atlantic, Indian, and Arctic Oceans **river** **-** fresh water flowing in a channel **solid -** the state of matter that has a definite shape and a definite volume **stomata** - is the small pores on plants that give off vapors and oxygen into the air ** transpiration ** - process by which water evaporates through tiny holes in a plant's leaves
 * atom** - the tiniest part of an element that has all the properties of that element. Everything is made up of atoms.
 * condensation** - process of changing from gas to liquid when heat is taken away
 * condense** - when a gas turns into a liquid, usually as a result of cooling
 * dam** - a strong barrier built across a stream or river to hold back water
 * estuary ** - area where a river meets the ocean and fresh water mixes with salt water
 * evaporates** - when a liquid changes into a vapor or gas
 * evaporation** - process of changing from liquid to gas when heat is added
 * fresh water** - water that does not contain salt
 * gas **     **-** the state of matter that does not have a definite shape or volume.
 * glacier** - huge, heavy mass of slowly moving ice
 * groundwater** - fresh water that is stored in the ground
 * humidity** - amount of water vapor in the air
 * hydrogen** - a colorless gas that is lighter than air and catches fire easily.
 * iceberg** - floating chunk of ice that broke off an ice cap or glacier
 * ice cap** - think sheet of ice covering a large area
 * infiltration** - when rain hits the Earth it sinks into the ground in the process called infiltration
 * lake** - large body of water surrounded by land
 * matter** - anything that takes up space and has weight such as a solid, liquid, or gas
 * melt** - to turn from a solid into a liquid when heat is added
 * molecule** - the smallest part of a substance that displays all the chemical properties of that substance. It is made up of more than one atom.
 * oxygen** - a colorless gas found in the air. Humans and animals neet oxygen to breath. Oxygen makes up 21% of the Earth's atmosphere.
 * photosynthesis** - process by which green plants use the energy in sunlight to make their own food
 * precipitation** - any form of water that falls from clouds to Earth, such as rain, snow, sleet, or hail
 * runoff** - water moving along the top of the ground; water from precipitation or from melting glaciers or snow moving along the ground
 * salt water** - water that contains salt, such as that found in the oceans and in certain inland bodies of water
 * surface wat**er - water on Earth's surface in lakes, ponds, and rivers
 * volume** - the amount of space taken up by a three-dimensional shape such as a box or a room
 * water cycle** - constant movement of water from Earth to the atmosphere and back to Earth; water evaporates, condenses to form clouds, and falls back to Earth as precipitation
 * water table** - highest level of soil and rock that is completely filled with groundwater
 * water treatment plant** - plant where water is treated to make it safe to drink
 * water vapor** - water in the form of a gas