States of matter
chemical or physical changes and properties
mixtures
element, compound, or mixture?
Challenge
100
what has a fixed volume and keeps its shape?
a solid
100
Paper burning
chemical change
100
trail mix is an example of what kind of mixture?
heterogeneous
100
pure substances are called.....
elements
100
What makes matter change from one state to another?
Thermal energy (heat) - when you add or remove it
200
the process where a solid is changing to a liquid is called....
melting
200
ice cube melting
physical change
200
two elements blending together but not forming chemical bonds is called.......
a solution or a homogenous mixture
200
two or more elements combining but not forming chemical bonds
a mixture
200
Salt (NaCl) is an example of which?
1.element
2.compound
3.mixture
a compound
300
what has no fixed volume or shape?
a gas
300
baking a cake
chemical change
300
True or false?
All mixtures can be separated
True
300
elements and compounds combining but not forming chemical bonds
a mixture
300
What is the formula for this molecule?
H2O
400
when atoms move freely and far apart, the state of matter is.....
a gas
400
which is a chemical property:
1. color
2. flammability
3. shape
flammability
400
you can separate three liquids with different densities using this method
centrigugation
400
Hydrogen and oxygen combining to form water
a compound
400
can you fill a container halfway with air?
explain your answer
No
Atoms in a gas always take up all space available
500
what has a definite volume but takes the shape of the container?
liquids
500
water boiling and turning into steam
physical change
500
Sugar is dissolving in water. What can you call the sugar:
1.solvent
2.solute
3.reactant
a solute
500
destillation is used to separate what type of mixture?
2 or more liquids combined
500
what is the difference between an atom and a molecule?
An atom is the smallest unit of an element
a molecule is two or more atoms bonded together