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Forces - Inflation of Balloons
Things that are full of air are light and can float on water.

Forces - Inflation of Balloons

Find out how blowing or pumping air into balloons shows pushes, stretches, and stored energy in a fun, safe way.

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Fascinating Fact:

Pump help. A hand pump pushes air in without using your mouth. Easier and safer for lots of balloons.

In KS1 Science, children explore how forces make things change shape. Inflating balloons shows how air can push, stretch rubber, and store energy ready to be released.

  • Inflate: To fill something, like a balloon, with air so it gets bigger.
  • Air Pressure: The push of air inside a balloon pressing on its sides.
  • Force: A push or pull that can move something or change its shape.
Why does a balloon get bigger when you blow it up?

When you blow or pump air into a balloon, the air goes inside and pushes outwards. This air pressure stretches the rubber, so the balloon gets bigger.

Is it safer to use a pump or your mouth to blow up balloons?

Using a hand pump is usually safer, especially for children. It avoids swallowing pieces if a balloon bursts and makes it easier to blow up many balloons.

What happens if you let go of an inflated balloon?

If you release a stretched balloon without tying it, the air rushes out. This escaping air pushes the balloon in the opposite direction, making it zoom around.

1 .
What is inside these balloons?
Hot air
Cold air
Water
Nothing
Hot air rises. It pushes the balloon up
2 .
Connor is blowing up a bicycle tyre. What is he pumping into the tyre?
Water
Oil
Rubber
Air
Have you ever used a bicycle pump?
3 .
What is making the balloon get bigger?
Rubber
Water
Plastic
Air
Are you good at blowing up balloons?
4 .
These children are enjoying being in a paddling pool. Before they can use the paddling pool, it has to be _____ __.
Let down
Squashed
Rolled up
Blown up
The paddling pool has to be blown up. It has to be inflated
5 .
Jacob is learning to swim. He has arm bands on. The arm bands are blown up. They are full of air. The arm bands help Jacob to _____ in the water.
Run
Walk
Float
Sink
Are you a good swimmer?
6 .
The bouncy castle is made of big plastic tubes. What is blown into the tubes to get the bouncy castle to be the right shape?
Air
Water
Lemonade
Oil
When the air is blown into the bouncy castle, the bouncy castle is inflated
7 .
These soap bubbles will touch the cactus. The cactus has long, sharp needles. What will happen to the bubbles?
They will get bigger
They will get smaller
They will burst
They will zoom away
Bubbles don’t last very long
8 .
Annie is blowing soap bubbles. What is inside the bubbles?
Air
Plastic
Rubber
Nothing
What is the biggest bubble you have ever blown?
9 .
This is a hot-air balloon. The burner has been turned on. It is making the air inside the balloon hotter. What will the balloon do?
Go up
Go down
Get smaller
Freeze
Have you ever seen a hot-air balloon in the sky?
10 .
What will happen to the balloon when the needle touches it?
It will burst
It will change colour
It will move to the right
It will get bigger
What sound does a balloon make when it bursts?
Author:  David Bland (Former Physics Teacher, KS1 Science & Geography Quiz Writer)

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