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Worksheets8I Fluids
Total questions: 20
Worksheet time: 11mins
Which of the following is a properity of a solid?
no fixed shape
cannot be compress
can flow
will fill the container it is put in
Which of the following is the correct description of the particles in a gas
Closely packed together. They vibrate, but don't move passed each other.
Closely packed together. They are free to move passed each other.
Spread far apart and moving in all directions.
Substance experience expansion when they are heated because
the particles move faster and get closer together
the particles move faster and so take up more space
the particles move more slowly and so take up more spcace
the particles get bigger when heated and take up more space
The density of most materials (a) if the material is cooled.
The mass of an piece 2cm cube of plastic is 2g, What is its density?
0.25 g/cm3
4 g/cm3
1 g/cm3
8 g/cm3
When a substance goes from a gas to a liquid it's called...
melting
sublimination
condensation
vaporization
What is the melting point of this substance?
(a)
What happens to the density of water when it freezes?
increases
decreases
remains the same
fluctuates
Increasing the temperature of a gas will increase the pressure. Which of the following help to explain this observation?
The particles of the gas move faster and collide more often.
The particles of the gas collide with more energy because they are moving faster.
The particles becomee larger and so collide more often.
The surface of the contain becomes smaller so the gas particles collide with it more often.
Why do fluids have pressure?
The particles are free to move.
The particles vibrate.
There's space between the particles.
The particles can spread out.
Where place would have the highest air pressure?
On top of a mountain
At sea-level
At the bottom of a 200 m deep mine
Halfway up a mountain
What is the force that pushes objects upwards in a fluid called?
upthrust
downthrust
weight
flaoting
If a piece of plastic has a density of 1.1 g/cm3 would it float or sink?
float
sink
The density of ice is 0.92 g/cm3. Cooking oil has a density of 0.90 g/cm3. Would ice float in oil?
Yes
No
Hot air balloons rise because when the air is heated it expands and has a (a) density than the surrounding cooler air.
Which of the following will reduce drag?
A streamline shape
A smooth surface
A smaller forward facing surface area
Moving faster
As objects move faster, the amount of srag they experience (a)
What happens to an object if the drag is greater than the force pushing the object forward?
it slows down
it travels at a constant speed
it speeds up
its speed will fluctuate
A car needs a forwards force to keep moving because:
Everything needs a force to keep moving.
Gravity is trying to slow it down.
It needs a force to balance friction and air resistance.
Weight balances friction.
Blocks of the same size but different materials are floating in a tank of water. There is more of block A beneath the surface than there is of block B. Which statement is correct?
Block B is denser than block A.
Both blocks have a density greater than 1 g/cm3.
Block A is denser than block B
You cannot say anything about their densities based on this information.
