Vocabulary:Earth's Atmosphere

reneawable resource= a resource that an 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 the decay of ancient forms og life.

smog = a mixtures of smoke and fog.

zx acid rain = moisture that falls to earth afte being mixed with wastes from buned fossil fuels .

Vocabulary:Earth's Rocks and Soil

rock : a naturally formed solid in the crust, made up of one or more monerals.

igneous rock : a rock formed when melted rock material cools and hadens.

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

fossil: any remains or imprint of living things of the past.

Metamorphic rock : a rock formed under heat and pressure from another Kind of rock .

humus : adding any harmful substances to Earth's land, water, or air .

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

Vocabulary: Earth's Changing Crust

fault:
 a crackin the cust, whose sides show evidence of motion .

Geologist:

a scientist who studies earth .

magma :

hot, molten rock deep below earth's surface .

lava:

magma than reaches earth's surface.

weathering :
the breakimg down of rocks into smaller pieces.

erosion:

the picking up and caying away of pieces of rock .

deposition:

the dropping off of bits of eroded rock.

meteorite:
a chunk of rock from space that strikes a surface (such as Earth o the Moon).

Vocabulary:Matter and Energy

Kinetic energy = The energy of a moving object .

potential energy = energy stoed   in an object or material.ç

conduction = movement of energy from a hot object that comes into contact with a cooler object; the material remains in  place .

convection = movement of energy by the flow of matter from place to place .

radiation= movement of energy  in the fom of waves that can travel through empty space .

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

dry cell battery = a battery that uses " dry chemicals" to poduce an electic current.

Vocabulary: Chemical Changes

1. physical change =  a change in size, shape, or state, without forming a new substance .

2.chemical change= a change in matter that produces a new substances with  different properties from the original .

3.chemical reaction = a chemical change of original substances into one or more new subtances

4.reactant = one of the oiginal substances before a chemical reaction takes place .

5.product= one of the new subtances produced when a chemical  reaction takes place .

Vocabulary:Mixtures and Solutions

mixture= two or more parts blended together yet keeping their own properties and not turning into a new substance.

solution = a mixture in which substances are completely  blended so that the properties are the same throughout and the substances stay blended.

suspension = a mixtue of substances that separate upon standing .

colloid=particles (or droplets) large enough to block out light spread throughout another substance .

emulsion = a liquid spread through a gas .

aerosol= liquid drops or solid particles spread through a gas .



gel = a solid spead though a liquid .



foam= a gas spread though a liquid or solid .





Vocabulary: Solid, Liquid , and gases

state of matter=any of the forms matter can exist in.

melting point = the temperature at which a solid changes state into a liquid .

boiling point= the temperature at which a liquid changes state into a gas.

freezing point = the temperature at bwhich a liquid changes state into a solid .

Picture

state of matter

melting point

boiling point

freezing point