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WorksheetsScience 9: Topic 3, Part 2 Review
Total questions: 8
Worksheet time: 4mins
Name
Class
Date
1.
The process of decomposing a chemical compound by passing an electric current through it is called:
a)
electrolysis
b)
decomposition
c)
separation
d)
division
2.
Water can be decomposed into which two elements?
a)
helium and oxygen
b)
hydrogen and oxygen
c)
hydrogen and ozone
d)
it cannot be decomposed
3.
True or false: The properties of a compound are different from the properties of the elements that make it up.
a)
True
b)
False
4.
Dalton's Atomic Theory states that:
a)
All matter is made up of small particles called atoms.
b)
Atoms cannot be created, destroyed, or divided into smaller particles.
c)
All atoms of the same element are identifcal in mass and size.
d)
All answers are correct.
5.
Atoms of one element are __________ in mass and size from the atoms of other elements.
a)
Equal
b)
Different
6.
A(n) _________ is a pure substance made up of one type of atom.
a)
Element
b)
Compound
c)
Solution
d)
Mechanical Mixture
7.
A(n) ___________ is a pure substance that is made up of two or more elements chemically combined together.
a)
Element
b)
Compound
c)
Solution
d)
Mechanical Mixture
8.
Scientific ________ explain structures or processes that cannot be seen.
a)
Ideas
b)
Equations
c)
Models
d)
Observations
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