Websites

Beloved children,

Remember to visit these websites if you have not done so. Use them for your revision.

1. http://www.bbc.co.uk/schools/scienceclips/ages/7_8/magnets_springs.shtml
2. http://www.rainforestmaths.com/
3. http://www.bbc.co.uk/schools/ks2bitesize/science/tests/gases.shtml
4. http://www.bbc.co.uk/schools/ks2bitesize/science/tests/solids_liquids.shtml
5. http://www.bbc.co.uk/schools/ks2bitesize/science/physical_processes/light_shadows/play.shtml
6. http://www.bbc.co.uk/schools/ks2bitesize/science/physical_processes/light_dark/play.shtml

Do have fun.

Do log in to lead.com and try the activities on Symmetry.

All the best,

Mrs Yang :)

Dear beloved children,

You may like to visit the following websites to try the quiz on matter.

http://www.bbc.co.uk/schools/ks2bitesize/science/tests/gases.shtml

http://www.bbc.co.uk/schools/ks2bitesize/science/tests/solids_liquids.shtml

Video: http://ksnn.larc.nasa.gov/k2/s_statesMatter_v.html

Lots of love,
Mrs Yang

Matter - Quick Revision

Mass is the amount of matter an object has.

Volume is the amount of space an object takes up.

Small things take up less space, hence they have smaller volumes.

Solid
A solid has a definite shape. It will not change its shapre no matter how much it has been moved around. However, its shape will change if a force is applied on it.

A solid has a definite volume thus it cannot be compressed.

Liquid
A liquid has no definite shape. It fills the shape of the container that holds it.

A liquid has a definite volume and cannot be compressed. Its volume does not change when it is put into different containers.

Gas
A gas does not have definite shape.

A gas does not have a definite volume, hence it can be compressed.


Question: Cotton is in the solid state. But why cana boy squeeze a plastic bag fill of cotton so that the bag occupies less space?

Answer: There is trapped air in the cotton. The air escapes when a boy squeezes the bag so the bag occupies less space.

Smoke - Solid or Gas?

Dear beloved children,

I have checked it on the internet.

Smoke is particulate material suspended in a gas (air).

Thus smoke is classified under solids.


Thank you.

Cheers,
Mrs Yang