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7 grade chem review

7th grade chem review

Chemistry is the study of _______. Matter
Matter has____ and takes up _____. Mass, Space
The different states of matter are,what? Solid,Liquid,and Gas
What are the three subatomic particles that make up an atom? Proton,Neutron,and Electron
What is the charge of a Proton? Positive +
What is the charge of a Neutron? Neutral or no charge +/-
What is the charge of an Electron? Negative -
All matter is made up of, what? Atom
What do these situations describe: .No space between particles .Heat is added becomes a liquid .Has a certain shape .Particles vibrate in place .has a certain size (volume) Solid
What do these situations describe: .Has no certain size (volume) .Particles move quickly away from each other .Particles has lots of space between them. .Heat is removed becomes a liquid Gas
What do these situations describe: .Has a certain size (volume) .Particles has some space between them .Heat added becomes gas .Heat removed becomes solid .Particles move around each other Liquid
A property that helps you describe the exterior of a solid,liquid,and gas. Physical Property
A property that can describe the inside or atoms of the matter. Chemical Property
A change that creates a new substances by the reaction of two or more matters. Chemical Change
A change that does not create a new substance but does change the physical properties of the original substance.(the substance can be returned to its original properties.) Physical Change
If you take cool aide and water,keep stirring, in the end will the change be chemical or physical? Physical!
If you burn a piece of paper with a match,will the change be chemical or physical? Chemical!
If you fry an egg, will the change be physical or chemical? Chemical! Because the egg has protein which denatures when heated up. (you can't get it back)
If you paint a wall, will the change be chemical or physical? Physical!
When your stomach breaks down your food is it a physical or chemical change? Chemical! because you cannot get the pieces of the food back together.
Created by: Edree