Science Study guide Chap 1-2

27 terms by cmontilla 

Ready to study?
Start with Flashcards

Create a new folder

Advertisement Upgrade to remove ads

Physical change + example

after the chang it is the same substance
- state
- shape
ex: solid to liquid to gas

chemical change + example

after the change it is a different substance
1)combustion
- burning

2) electrolisis
- using electricity to break things down

3) oxcidation
- combining w/ oxygen

4) tarnishing
- combining w/ sulfuror other substance

ex: cookie batter (baking heat)= cookie

pure substance

only 1 element alone that can't be broken down

elements

pure substances that can't be broken down into simpler substances

weight

force of gravity or amnt of gravity on an object

calculate density

density=mass/volume

atoms

basic unit of matter
proton=positive
neutron=neutral
electron=negative

chemical bond

force that holds two atoms together

endothermic change vs exothermic change

endothermic:
energy in = cold
exothermic:
energy out = hot

SI unit for mass

metric system
gram, kilogram

physical properties

- texture
- color
- flexibility
- shape
- state

chemical properties

- flamability
- ability to react

mixtures

2 or more substances that are not chemically combined

compounds

atoms that are combined to a specific ratio

compare mixtures and compounds

both are combinations of 2 or more substances

viscosity

liquid's resistance to flow
ex: honey= high viscosity
water= low viscosity

sublimation

solid to gas

surface tension

surface paricles form a "skin" on top of the water

vaporization

- evaporation surface particles
- boiling below the surface

condensation

gas to liquid

melting and energy transferance

solid to liquid
gaining energy

boiling point and air pressure

The boiling point of a substance depends on the pressure of the air above it
ex- higher u r the faster things boil because there is less air pressure above it

endothermic reaction vs exothermic reaction

endothermic:
energy in = cold
exothermic:
energy out = hot

solid vs liquid vs gas

solid- definate shape definate volume
liquid- definate volume no definate shape
gas-no definate shape or volume

density (sink vs float)

denser then liquid= sink
less dense then liquid= float

density of regularly vs irregularly

regularly-
(cube/rectangular prism) lwh
irregularly-
drop object in test tube that is filled w/ water up to the 50 ml mark, divide the finishing volume w/ the mass

solid

definate shape and defiate volume

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set