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Science Grade 8
Test Description: Science grade 8
Instructions: Answer all questions to get your test result.
1) Does gas spread quickly
A
-
B
Maybe
C
No
D
Yes
2) Particles in a Gas
A
Have no particular arrangement
B
-
C
Are all the same
D
They are scattered all together
3) Do gas particles move very fast
A
All the time
B
No
C
Yes
D
-
4) Gas particles
A
Has a no energy
B
Moves very slow
C
-
D
Possess a lot of energy
5) Gases can be compressed because particles can be forced closer together
A
Never
B
-
C
No
D
Yes
6) Are particles in liquids and gases constantly moving
A
False
B
-
C
True
D
No
7) Do the particles of liquids and gases move randomly
A
Never
B
Yes
C
-
D
No
8) Mixing and spread of particles in gas and liquid is called
A
Separation
B
Diffusion
C
-
D
Mixture
9) Diffusion can be described as random movement from a
A
Neither
B
High concentration to a low concentration
C
High concentration to a low concentration to spread evenly
D
Low concentration to a High concentration
10) Factors that affect Rate
A
All
B
The temperature of the particle
C
The mass of the particle
D
The state of the particle
11) Factors that affect Rate
A
-
B
The movement
C
The diffusion
D
The size of the spaces between particles
12) Why do particles diffuse
A
Because of the gravity pull
B
Because they are in constant motion
C
Because they need to create a mixture
D
-
13) What is changes of state
A
Both
B
None
C
eg. liquid to solid
D
In Science change of state refers to the change in physical state
14) Does change of state involve energy
A
Yes
B
All
C
Never
D
No
15) For particles to change from one state to another
A
It must either gain or lose energy
B
None
C
There is no energy involved
D
It only requires heat
16) What is energy
A
Ability to change
B
None
C
Heat
D
Cold
17) What is kinetic enregy
A
Energy in motion
B
All
C
Particles with a lot of kinetic energy
D
The move fast and far apart
18) What is thermal energy
A
In a sample of matter
B
Total kinetic energy of all the particles
C
None
D
All
19) What is temperature
A
Cold - less energy
B
Average kinetic energy of the individual particles
C
All
D
Hot - more energy
20) Define sublimatin
A
None
B
Some substances can change from solid to gas without changing to liquid
C
All
D
During this process the surface gain enough energy to become a gas
*select an answer for all questions
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