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WorksheetsGRADE 7
Total questions: 20
Worksheet time: 18mins
In a solid, particles ________________
move freely
slide past one another
have large amount of energy
do not have much room to move
How do particles act in a liquid?
Every particle stays in one spot.
Particles spread far apart from one another.
Particles slide past one another
Particles squeeze together to fit into small spaces.
Identify the particles.
solid
liquid
gas
none
If a hairspray can is heated, what can be expected of the pressure of the gas inside the can?
The pressure will increase
The pressure will decrease
The pressure will remain constant
The pressure will equalize
The pressure inside the balloon will:
Decrease
Increase
Remain the same
Not enough information to formulate an answer
A bar of copper has a mass of 216g and a volume of 24 cm3. What is the density of copper?
9g/cm3
5184g/cm3
.11g/cm3
322mL
Calculate the density of the object below if it has a mass of 3g. (Hint: you need to find the volume.)
60 g/cm3
3 g/cm3
20 g/cm3
0.05 g/cm3
Diffusion is the movement of molecules from an area of _____ concentration to an ______ concentration
High, low
Low, high
Low, low
High, high
Diffusion occurs only in solids
True
False
When does diffusion stop?
After a day and a night
When the particles are evenly spread out
When there are no particles left
When all the particles leave the system
How does an increase in temperature affect diffusion?
Diffusion speeds it up
Diffusion slows it down
Diffusion has no effect
What is the smallest piece of matter that still has properties of that matter?
element
atom
proton
