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Solids, Liquids and Gases 02
In order to smell, particles from the object must enter your nose. These particles are gas.

Solids, Liquids and Gases 02

Matter can exist in different forms. In KS2 Science, pupils explore solids, liquids, and gases, learning how heating and cooling change one state into another.

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Fascinating Fact:

Scientists have discovered strange states of matter beyond solids, liquids, and gases, such as plasma and Bose-Einstein condensates.

In KS2 Science, pupils learn that the three main states of matter are solids, liquids, and gases. These states can change when energy is added or removed, like ice melting or water boiling.

  • Evaporation: The process where a liquid turns into a gas, often when heated.
  • Condensation: The process where a gas cools down and changes back into a liquid.
  • Plasma: A state of matter made of charged particles, found in stars and lightning.
What are the three main states of matter in KS2 Science?

The three main states of matter are solids, liquids, and gases. They differ in particle movement and arrangement.

Are there more states of matter beyond solid, liquid, and gas?

Yes, scientists have discovered other states like plasma and Bose-Einstein condensates, but these are not part of KS2 Science.

How do substances change between states of matter?

Substances change state when heated or cooled, for example melting ice to water or freezing water into ice.

1 .
In order to smell, particles from the object must enter your nose. In which state of matter are these particles?
Solid
Liquid
Gas
Liquid or gas
You breathe the gas in through your nose and detect any smell which pass through
2 .
Which of the following describes what happens when water evaporates?
Gravity causes the water to run downhill and disappear
The water gradually becomes solid and these solids break away from the liquid
The water doesn't exist any longer
Particles gain enough energy to break free from the liquid's surface
If a particle gets enough energy it leaves the liquid. Particles like this form gases
3 .
What is solid water called?
Magma
Dry ice
Ice
Water vapour
When water is placed in the freezer, it becomes a solid - ice
4 .
Can sugar become a liquid?
Yes, when it is heated to a very high temperature
Yes, when it is heated to 100° Celsius
Sometimes, depending on what type of sugar it is
Sugar can never become liquid
Sugar becomes liquid at around 186° C - heating sugars to such high temperatures is how sweets are made
5 .
What is water called when it is a gas?
Helium
Carbon dioxide
Nitrogen
Water vapour
Water vapour is also called steam. Steam is invisible - what you see rising from a kettle or a pan are water droplets in the air
6 .
A sweet fizzy drink contains what?
Solid only
Liquid only
Gas only
Solid, liquid and gas
Sweetened fizzy drinks contain solid (sugar), liquid (water) and gas (carbon dioxide)
7 .
In cooler temperatures, how do the particles of any material move?
More slowly
More quickly
Alternately slowly and quickly
Particles never change how they move
Cooler particles have less energy
8 .
In warmer temperatures, how do particles of any material move?
More slowly
More quickly
Alternately slowly and quickly
Particles never change how they move
Warmer particles have more energy
9 .
Although air is made up of several gases, the two main ones are nitrogen and which other?
Helium
Oxygen
Carbon dioxide
Methane
Animals - including people - need oxygen to breathe!
10 .
When a material is heated, what happens to its particles?
They lose energy and become more strongly attached (attracted) to other particles
They gain energy and become less strongly attached (attracted) to other particles
They begin to stick together
They stop moving
Heat gives energy to the particles and makes them vibrate or move
You can find more about this topic by visiting BBC Bitesize - Solids, liquids and gases

Author:  Sheri Smith (PhD English Literature, English Teacher & Quiz Writer)

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