Vocabulary #16

1.Desallination: Getting fresh water from sea water.

2.Water cycle: The continuous movement of water between earth´s surface and the air,changing from liquid to gs to liquid.

3.Groundwater: Water that seeps into the ground into spaces between bits of rock and soil.

4.Water tabla: The top of the water-filled spaces in the ground.

5. Aquifer: An underground layer of rock or soil filled with water.

6. Sping: A place were ground water seeps out of the ground.

7.Well: A hole dug below the water table that water seeps into.

8.Reservoir: A storage area for fresh water supplies.

Vocabulary #15

1.Renewable resource: A resource that can be replaced in a short period of time.

2.Ozone layer: A layer of ozone gas in the atmosphere that screens out much of the sun`s UV rays.

3.Fossil fuel: A fuel formed from the decay of ancient forms of life.

4.Smog: A mixture of smoke and fog.

5.Acid rain: Moisture that falls to earth after being mixed wirh wastes from burned fossil fuel.

Vocabulary #14

1.Kinetic energy: The energy of a moving object.

2.Potential energy: Energy stored in an object or material.

3. Conduction: Movement of energy from a hot object that comes into contact with a cooler object,the material remains in place.

4.Convection: M ovement of energy by the flow of matter from place to place.

5.Radiation: Movement of energy in the form of waves that can travel through empty space.

6. Wet cell battery: A battery containing liquid solution that produces the electric current.

7.Dry cell battery: A battery that uses "dry chemical"to produce an electric current.

Vocabulary #13

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 substance with different properties from the original.

3.Chemical reaction: A chemical change of original substances into one or more new substances.

4.Reactant: One of the original substances before a chemical reaction takes place.

5.Product: One of the new substances produced when a chemical reaction takes place.

Vocabulary #12

1.Mixture: Two or more parts blended together yet keeping their own properties and not turning into a new substance.

2.Solution: A mixture in wich substances are completely blended so that the properties are the same throughout and the substances stay blended.

 3. Suspension: A mixture of substances that separate upon standing.

4.Colloid: Particles (or droplets) large enough to block out light spread throughout another substance.

5.Emulsion:A liquid spread through another liquid.

6.Aerosol:Liquid drops or solid spread through a gas.

7.Gel: A solid spread through a liquid.

8.Foam:A gas  spread through a liquid or solid.

Vocabulary #11

1.State of matter: Any of the forms matter can exist in

2.Melting point: The temperature at wich a solid changes state into a liquid.

 3.Boilig point: The temperature at wich liquid changes state into a gas.

 4.Freezing point: The temperature at wich a liquid changes state into a solid.

Science project #2

Definition: In this project we will learn about the land pollution in my neighborhood.





Description of the problem: In my neighborhood we have land pollution because the kids and also adults throw the trash on the floor because they are lazy to throw the trash on the waste basket,so i will try to help on that problem.



 

 I can help with this problem by puting more waste basket with signs sayin "Don´t be lazy and throw the trash on the waste basket !".