Grade 6 - Test 1

Question 1

What is force?

Answer 1

A push or pull on an object

Question 2

Pressure (blank); gravity (blank) ; magnetism (Blank or Blank)

Options: pushes, pulls or pushes & pulls

Answer 2

Pressure pushes; gravity pulls; magnetism pushes or pulls.

Question 3

how does a pressure cooker use pressure to cook food?

Answer 3

The pot is sealed except for a small pressure valve to let
just a bit of pressure out. The food cooks faster because it
is under high pressure.

Question 4

What is blood pressure?

Answer 4

Blood pressure is how hard
the blood is pushing on the
walls of the arteries.
High blood pressure
damages the arteries and
can cause heart attacks,
but low blood pressure is
not good for the body eithe

Question 5

High pressure vs. Low Pressure - which is considered bad weather and which is considered bad?

Answer 5

low pressure = poor weather and high pressure = good weather

Question 6

True or False: The human body lives under pressure: we have the pressure of earth’s atmosphere
pushing down on us, but we are okay because we are used to it.

Answer 6

True

Question 7

How high is the earth’s atmosphere?

Answer 7

100 km

Question 8

what is the air pressure at sea level?

Answer 8

one atmosphere of pressure” or 1 atm.

Question 9

when air is stacked at 100 km (the earths atmosphere) what is the force pressing on your skin?

Answer 9

when it is stacked that high there is about 1 kilogram of force pushing on every square centimetre of your skin.

Question 10

The name “Mount Everest” has come to means?

Answer 10

The name “Mount Everest” has come to mean “the
greatest challenge,”

Question 11

True or False: There is no oxygen in space and almost no pressure,

Answer 11

True

Question 12

What happens to humans without air pressure?

Answer 12

without air pressure, the materials in our bodies become less dense, liquids turn to gas, and our bodies explode.

Question 13

How has space explorations become possible?

Answer 13

Space exploration is possible only because we have figured out how to carry pressure. Space suits and
spaceships are pressurized, so the human body can function normally.

Question 14

what happens to pressure under water?

Answer 14

When something is under water, it has the pressure of the atmosphere and the water combined pressing on it.

Question 15

Does water weigh more than air?

Answer 15

Yes

Question 16

What happens to pressure the deeper you go under water?

Answer 16

When people go under water, the pressure increases quickly, because seawater weighs much more than air.

Question 17

what happens to a diver at 50 M under water?

Answer 17

At 50 metres below the water, a diver’s body experiences more than six times the atmospheric pressure of sea level.If he dives too deep, the pressure could be enough to crush him.

Question 18

.The air that the diver breathes when he is under water is affected by one of the
basic principles of pressure:

RESPOND WITH: Increases, Decreases

As the diver goes deeper,
● the pressure from the water (Blank),
● the volume of his lungs (Blank) (his body is getting squeezed by the water, so his lungs have less space),
● therefore the density of the air in his lungs (blank) (there are more air molecules in a smaller space).

Answer 18

As the diver goes deeper,
● the pressure from the water
increases,
● the volume of his lungs
decreases (his body is getting
squeezed by the water, so his
lungs have less space),
● therefore the density of the air in
his lungs increases (there are
more air molecules in a smaller
space).

Question 19

What happens to a divers lungs when he dives vs. when he comes back up?

Answer 19

When a diver is deep underwater, the water pressure compresses his lungs. When he comes up, his lungs
experience decompression: they become less compressed. If he comes up too fast, that can lead to
problems.

Question 20

what is density?

Answer 20

density is the amount of matter in a certain space.

Question 21

What happens to air molecules when density increases vs when it deacreses?

Answer 21

If the density of air is increased, there will be more molecules of the different gases that make up air. If the density of air decreases, there will be fewer molecules in the same space.

Question 22

What happens to air pressure, molecules and density with high altitudes?

Answer 22

The higher one goes,
- the LESS air pressure there is,
- so the fewer air molecules there are
- and the less dense the air is.

Question 23

Is there air pressure at higher altitudes?

Answer 23

At higher altitudes there is very little air pressure.

Question 24

How high is mount everest?

Answer 24

9 kilometres above sea level,

Question 25

How is the air pressure and density at the top of mount everest?

Answer 25

because there is so little pressure at this altitude, the air is about a third as dense as at sea level.

Question 26

How is it for humans at the top of munt everest?

Answer 26

with every breath of air, there are a third as many molecules of oxygen as the human body is accustomed
to.Human beings cannot fully adapt to an altitude above 5 kilometres above sea level, which has half the air pressure as sea level (and Mount Everest has a third!)

Question 27

How is the pressure when you blow into or deflate a balloon?

Answer 27

When you force air into a balloon by blowing into it, that air is under high pressure because the rubber in the
balloon resists being stretched.When you break a balloon, it pops because the high pressure air comes out quickly to equalize with the lower pressure outside air.

Question 28

Can You change the pressure in a balloon by cooling or warming it?

Answer 28

yes

Question 29

what are the three states of matter?

Answer 29

Liquid solid or gas

Question 30

what are the properties of matter?

Answer 30

shape mass and volume

Question 31

Give three examples of pressure in everyday life

Answer 31

water air and tire

Question 32

What are the three states of matter?

Answer 32

Solid, liquid or gas.