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WorksheetsYear 7: The Blue Planet
Total questions: 16
Worksheet time: 10mins
Name
Class
Date
1.
Which of the following statements best describes gases?
a)
Gases have a fixed shape and volume.
b)
Gases spread and increase their volume to fill their container.
c)
Gases have a fixed volume but flow to fill their container.
d)
Gases have the least energy of all three states.
2.
Identify the statement that best describes liquids:
a)
Liquids are always transparent (see-through).
b)
Liquids have a fixed shape and volume.
c)
Liquids spread and increase their volume to fill their container.
d)
Liquids have a fixed volume but flow to fill their container.
3.
Identify which of the following statements about solids is correct:
a)
The particles are widely spaced.
b)
The particles are strongly bonded together.
c)
The particles travel very fast in straight lines.
d)
The particles are weakly bonded together.
4.
What happens to particles when a substance is heated?
a)
The particles melt.
b)
The particles move faster.
c)
The particles evaporate.
d)
The particles get larger.
5.
What is the boiling point of water?
a)
0oC
b)
-273oC
c)
100oC
d)
25oC
6.
Identify which of the following items correctly describes the change of state from liquid to gas:
a)
Freezing
b)
Evaporation
c)
Sublimation
d)
Condensation
7.
Name the process that is the opposite to freezing:
a)
Evaporation
b)
Melting
c)
Condensation
d)
Sublimation
8.
In summer the water in a fish pond needs to be topped up more than in winter. Propose the most likely reason.
a)
The pond leaks more in summer
b)
The fish drink more water in summer
c)
More water evaporates from the pond in summer more than winter
d)
Water restrictions stop you filling the pool in summer.
9.
Sand and gravel may be separated from each other through using:
a)
a filter funnel
b)
a sieve
c)
an evaporating basin
d)
a distillation
10.
Name the separation technique shown in the diagram:
a)
evaporation
b)
distillation
c)
filtration
d)
decanting
11.
Which one of the following methods is used to separate the colours in food dyes?
a)
winnowing
b)
Threshing
c)
Crystallization
d)
chromatography
12.
What is a solvent?
a)
The substance that does the dissolving in a solution.
b)
The substance that is being dissolved in a solution.
c)
The mixing of different substances.
d)
The process in which neutral molecules lose or gain electrons
13.
The substance being dissolved in a solution.
a)
sands
b)
solute
c)
solvent
d)
alloy
14.
Solutions are composed of __________ .
a)
salts and solutes
b)
solvents and salts
c)
solutes and alloys
d)
solutes and solvents
15.
What two elements make up water?
a)
Helium and oxygen
b)
Hydrogen and oxygen
c)
helium and carbon
d)
oxygen and carbon
16.
A combination of two or more substances that are not chemically combined
a)
solution
b)
mixture
c)
compound
d)
element
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