Vocabulary 16- Earth's Water Supply

desallination: getting fresh water fro seawater.

water cycle: the continious movement of water between Earth's surface and the air, hanging from liquid to gas to liquid.

groundwater: water that seeps into the ground into spaces between bits of rock and soil

water table: the top of the water-filled spaces in the ground.

aquifer: an underground of rock or soil filled with water.

spring: a place were groundwater seeps out of the ground.

well: a hole dug below the water table that water seeps into.

reservoir: a storage area for freshwater supplies.

Vocabulary 15- Earth's Atmosphere

renewable resource: a resource that can be replaced in a short period of time.

ozone layer: a layer of ozone gas in the atmosphere that screens out much of the sun's UV rays.

fossil fuel: a fuel formed from a decay of ancient forms of life.

smog: a mixture of smoke and fog.

acid rain: moisture that falls to Earth after being mixed with wastes fro burned fossil fuels.

vocabulary 14 - Earth's Rocks an Soil

rock: a naturally solid in the crust, made up of one ore more minerals.

igneous rock: a rock formed when melted rock materials cools and hardens.

sedimentary rock: a rock made of bits of matter joined together.

fossil: any remanins or printing of living things of the past.

methamorphic rock: a rock formed under heat and pressurefrom another kind of rock.

humus: decayed plant or animal material in soil.

pollution: adding any harmfull substances to earth's land, water, or air.

rock cycle: rocks changing from one form into another in a never-ending series of process.

Vocabulary 13 - Minerals of Earth's crust

Mineral: a solid material of Earth's crust with a definite composittion.

luster: the way ligth bounces off a mineral surface.

streak: the color of the powder left when a mineral is rubbed against a hard, rough surface.

hardness: how well a mineral resist scratching.

cleavage: the tendency of a mineral to break along flat surface.

ore: amineral containing useful substance.

gem: a mineral valued from being rare and beautiful.

nonrenewable resource: a resource that cannot be replace within a short period of time or at all.

vocabulary 10- matter and energy

Kinetic energy: the energy of a moving object.

potential energy: energy stored in an object or material.

conduction: movement of energy from a hot object that comes into contact with a coocler object; the materials remain in place.

radiation: movement of energy in the form of waves that can that can travel through empty space.

wet cell battery: a battery containing liquid solution that produces the electric current.


¡

dry cell battery: a battery that uses `` dry chemicals´´ to produce an electric current.

Vocabulary 9 -Chemical Changes

Physica change: a change in size, shape, or state, without forming a new substance.

Chemical change: a change in matter that produce a new substance with different properties from the original.

Chemical reaction: a chemical change of original substance nto one or  more new substances.

reactant: one of  the original substance before a chemical reaction takes place.

product: one of the new substances produced when a chemical reaction takes place.

Vocabulary 8- Mixtures and Solutions

Mixture: two or more parts blended together yet kipping their own properties and not turnning into a new substance.

Solution: a mixture in wish substance are completely blended so that properties are the same throughout and the substance stay blended

suspension: a mixture of substance that separate upon standing 

colloide: particles (or droplets) large enough to block out light spread throughout another substance

Emulsion: a liquid spread through another liquid

aerosol: liquid drops or solid particles spread through a gas 

gel: a solid pread through a liquid

foam: a gas spread through a liquid or solid. 

vocabuly 7- solid, liquids, and gases

STATE OF MATTER: ANY OF THE FORMS MATTER CAN EXIST.

MELTING POINT:  THE TEMPERATURE AT WHICH A SOLID CHANGES STATE INTO A LIQUID.

BOILING POINT: THE TEMPERATURE AT WHICH A LIQUID CHANGES STAT INTO A GAS.

FREEZING POINT: THE TEMPERATURE AT WISH A LIQUID CHANGE STATE INTO A SOLID.