WorksheetsGr 8 Chapter 1 Test Review
Total questions: 25
Worksheet time: 21mins
Name
Class
Date
1.
Baking soda and vinegar combine to make carbon dioxide
a)
Chemical Change
b)
Physical Change
2.
Water freezing
a)
Chemical Change
b)
Physical Change
3.
Shredding a piece of paper
a)
Chemical Change
b)
Physical Change
4.
Rust on an iron fence
a)
Chemical Change
b)
Physical Change
5.
The substances listed on the right side of a chemical equation are the
a)
Yields
b)
Reactants
c)
Products
d)
Precipitates
6.
CaCO3 represents a chemical
a)
Symbol
b)
Formula
c)
Subscript
d)
Reaction
7.
The substances listed on the left side of a chemical equation are the
a)
Products
b)
Coefficients
c)
Precipitates
d)
Reactants
8.
Identify the reactant(s) and product(s) of the reaction.
a)
All three are reactants and none are products.
b)
Hydrogen and water are the reactants, and oxygen is the product.
c)
Water and oxygen are the reactants, and hydrogen is the product.
d)
Hydrogen and oxygen are the reactants, and water is the product.
9.
A molecule is smaller than an atom.
a)
True
b)
False
10.
How many Hydrogen (H) atoms are in NH3O5
a)
3
b)
4
c)
5
d)
1
11.
A molecule is________
a)
a glob of gelatinous goo
b)
smaller than an atom
c)
filled with raisons
d)
more than one atom bonded together
12.
Which compounds are the PRODUCTS of this reaction?
a)
CO2 + H2O
b)
C6H12O6 + O2
c)
C6H12O6 + CO2
d)
H2O + O2
13.
A single unit that can bond to other single units to form a polymer is a:
a)
Lego
b)
Monounits
c)
Monopoly
d)
Monomer
14.
Many monomers bonded together form a:
a)
Multimer
b)
Polygon
c)
Polymer
d)
Manymer
15.
How many monomers are shown here?
a)
1
b)
3
c)
5
d)
7
16.
How many different elements are in this chemical formula: C2H2ClK3
a)
6
b)
8
c)
2
d)
4
17.
Which of the following chemical formulas represents a compound?
a)
C3
b)
O2
c)
CH3CHO
d)
H2
18.
What is sugar?
a)
element
b)
compound
c)
mixture
19.
What is water?
a)
element
b)
compound
c)
mixture
20.
When two or more elements chemically combine
a)
element
b)
compound
c)
mixture
d)
solution
21.
What is the tiniest particle in the entire universe?
a)
cells
b)
gases
c)
atoms
d)
liquids
22.
Which of the following is NOT an element?
a)
H2O
b)
H2
c)
O2
d)
Au
23.
The number of atoms of oxygen in
Cu(NO3)2 is ...
Cu(NO3)2 is ...
a)
2
b)
5
c)
6
d)
zero
24.
Which of the following IS a chemical change
a)
using chalk
b)
water freezing
c)
slicing cheese
d)
digestion
25.
Which of the following IS a physical change?
a)
Getting a haircut
b)
Rusty metal
c)
sour milk
d)
A compound
100 %
