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WorksheetsElements ,mixtures and compounds 7B
Total questions: 20
Worksheet time: 9mins
Name
Class
Date
1.
Contains only one kind of atom.
a)
Element
b)
Compund
c)
Mixture
2.
Contains two or more atoms combined
a)
Elements
b)
Compounds
c)
Mixtures
3.
The air is a _________.
a)
element
b)
mixture
c)
compound
d)
energy
4.
Elements can be broken down into simpler substances.
a)
false
b)
true
c)
sometimes
5.
Examples are milk and gasoline.
a)
elements
b)
mixtures
c)
compounds
6.
Examples are diamonds (C) and Uranium (U)
a)
elements
b)
mixtures
c)
compounds
7.
Is sugar (C12H22O11) an element or a compound?
a)
Element
b)
Compound
8.
An element is made up of only one kind of _____.
a)
isotope
b)
plastic
c)
atom
d)
metal
9.
What is salad?
a)
element
b)
compound
c)
mixture
10.
Classify the picture with the correct label.
a)
Element
b)
Compound
c)
Mixture of Elements
d)
Mixture of Compounds
11.
Which of the following is an element?
a)
Sugar
b)
Salt
c)
Water
d)
Oxygen
12.
A pure substance that cannot be broken down into other substances by chemical or physical means.
a)
compound
b)
atom
c)
mixture
d)
element
13.
Water is an element
a)
true
b)
false
14.
A pure substance...
a)
is an element or a compound
b)
is an element or a mixture
c)
is a compound or a mixture
d)
is a mixture
15.
Humans absorb oxygen from the air they breathe in and exhale carbon dioxide gas, CO2. Carbon dioxide gas is
a)
an element made of carbon and oxygen atoms.
b)
a solution made of carbon and oxygen atoms.
c)
a compound of carbon and oxygen atoms.
d)
a mixture of carbon and oxygen atoms.
16.
This picture represents which of the following?
a)
Mixture of compounds
b)
compound
c)
mixture of elements
17.
Which example is a compound?
a)
N2
b)
O2
c)
Cu
d)
H2O2
18.
What is the picture displayed?
a)
atom
b)
element
c)
molecule
d)
compound
19.
Which is the best example of a pure substance?
a)
pizza
b)
gold
c)
saltwater
d)
air
20.
When elements form mixtures, the elements keep their original properties.
a)
True
b)
False
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