Download File - 8th Grade Physical Science

Hosted
by
Ms. Gould
Elements
Compounds
Mixtures
Chemical
Change
100
100
100
100
200
200
200
200
300
300
300
300
400
400
400
400
500
500
500
500
What is the Periodic Table?
If it is an element, it is found
on this chart.
Row 1, Col 1
What is chemically combined in a specific ratio?
A compound is 2 or elements
combined in this way. (Hint:
there are TWO parts to this)
1,2
What is heterogeneous?
A bag of gummy bears is this
type of mixture.
1,3
What is new matter with new properties?
This is created after a chemical
reaction occurs.
1,4
What is a metalloid?
A mysterious sample is shiny
and it will conduct some
electricity but it is not
ductile. This is the category
of elements that the sample
would best fit in.
2,1
What is 3?
This is the chemical formula for
acetone, OC(CH3)2. This is the
number of Carbon atoms in the
formula for acetone.
2,2
What is the lemonade powder?
In a solution of lemonade
powder and water, this is the
solute.
2,3
What is 2 Nitrogen atoms and 6 Hydrogen atoms?
N2 + 3H2  2NH3
This is the number of and types of atoms
in the reactants of this chemical
equation.
2,4
What is Potassium?
I went to the local vitamin
store to pick up this
supplement, it is signified
with the symbol, K.
3,1
Compounds are chemically combined and mixtures are
physically combined
This is the difference between a
compound and a mixture.
3,2
What is a colloid?
The particles in this type of
mixture are large enough to
scatter light but not heavy
enough to settle out.
3,3
What is electrolysis?
This is what it is called when
we use electric current to
break down a compound.
3,4
What is density?
This characteristic property
described as the ratio of a
samples mass over volume
can be used in determining
the identity of an element.
4,1
What is chemically?
Compounds can only be broken down
in this way.
4,2
What is concentration?
This describes the amount of
solute dissolved in an amount
of solvent.
4,3
What are characteristic properties?
Flammability and reactivity are
examples of this type of chemical
property that are the same no
matter the sample size.
4,4
What is magnetism?
Physical Property
Substance 1
Substance 2
Boiling Point
1,310°C
1,004°C
Color
Silvery white
Silvery White
Other
Magnetic
Non-magnetic
This is how we can tell that substance 1
and 2 are not the same.
5,1
What are CH4 and 5O2 (methane and oxygen)?
CH4 + 5O2  CO2 + 2H2O + 302
These are the reactants.
5,2
What is a centrifuge?
This machine is used to separate
mixtures according to their
densities.
5,3
What is bubbling, foaming, smell, color change, hot gas
formed, or light given off?
These are 3 examples of things
that may occur to signify that a
chemical change has taken place.
5,4