phase change
solid to a liquid
Melting
give 2 examples of a heterogeneous mixture
chex mix, lucky charms
Name all four states of matter
solid, liquid, gas, plasma
Give two chemical properties of gasoline
flammable and very reactive
What is the equation for density?
density= mass/volume
When water turns into ice what has happened?
Freezing
Paint is an example of what?
homogeneous mixture
what state of matter has a definite volume, but takes the shape of its container?
liquids
chem or phys: bending a metal rod.
physical
If substance A has a density of 3.2, Substance B has a density of .01, and substance C has a density of 1.5, how would they stack if placed in a graduated cylinder?
from top to bottom
B,C,A
solid, liquid, or gas, which one has the most energy?
gas
H2O is an example of an element or a compound?
Compound
how many atoms are in the following compound. Ca3O4
7
what is the difference between a chemical and physical change?
a chemical change creates something new
If an object's density is 1.5, will it sink or float in water?
sink
turning as gas into a liquid?
condensation
This is made of the same type of atoms
elements
Describe how fast the particles in a solid behave.
very slow movement or vibrating.
how can a lit wax candle be both a chemical and physical change.
chemical: burning
physical: melting wax
What is the mass if the volume is 10ml and the density is 100g/ml?
1000 grams
Dry ice would be an example of what phase change?
Sublimation
Name the two different pure substances
element, compound
according to charles' law, what happens to the volume of a gas if the temperature goes up?
also goes up
What are the four ways we know a chemical reaction occured? (name at least 3)
1. gas formed
2. energy change
3. color change
4. precipitate formed
Mass=200g
density= 20g/ml
what is the volume?
10ml