Topic 2 Test
Authored by Micah Effrein
Science
8th Grade
VA covered
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50 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a physical property that can be used to identify a pure substance?
Reactivity with acid
Melting point
Ability to rust
Combustibility
Tags
VA.PS.3.a
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A student observes that a substance has a boiling point of 100°C and a melting point of 0°C. What can be inferred about the substance?
It is likely to be ethanol.
It is likely to be water.
It is likely to be iron.
It is likely to be sodium chloride.
Tags
VA.PS.3.a
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
According to the kinetic molecular theory, what happens to the particles of a gas when the temperature increases?
They move slower.
They move faster.
They stop moving.
They move at the same speed.
Tags
VA.PS.2.c
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does the kinetic molecular theory explain the expansion of a balloon when heated?
The particles move closer together, increasing pressure.
The particles move faster and spread apart, increasing volume.
The particles stop moving, causing the balloon to expand.
The particles decrease in size, allowing more air in.
Tags
VA.PS.2.c
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a chemical property that can be used to identify a pure substance?
Density
Solubility
Flammability
Color
Tags
VA.PS.3.a
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A student is given a sample of an unknown pure substance. Which property should they measure to help identify it?
Mass
Volume
Density
Shape
Tags
VA.PS.3.a
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the kinetic molecular theory suggest about the particles in a solid?
They are in constant motion and far apart.
They are in fixed positions and vibrate in place.
They move freely and rapidly.
They are not moving at all.
Tags
VA.PS.2.c
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