This year, I have only a few P4 students.
They are the little ones of my flock as most of my students are in Secondary.

Here are some questions on Heat.

Parents, Please ask students to copy the questions onto their exercise books and attempt these questions as homework this week. Thank you!

1) State whether the following are conductors of heat or insulators.

– Air
– Water
– Ceramic
– Wood
– Plastic
– Cotton Wool
– Clay
– Saw dust
– Copper
– Rubber
– Sodium
– Titanium

2) Which group of materials when touched by warm hand will feel colder? Explain why.

3) Arrange the following states of matter in order of increasing expansion upon heating.

(Solid, Liquid, Gas)

4) What are some of the common liquids used in thermometers? Name the most important characteristic of these liquid to be used in thermometer.

5) Heat flow from _________ object to _________ object.

6) Hot air sinks or rises. Explain why.

7) When a thin flask filled with water is heated, the level of the water will drop a little before it rises. Explain why.

8) Is heat a matter? Explain why.

9) It is not good to use thick glasses to hold hot boiling water. True or False. Explain why.

10) Explain why hot water pipes have loops. (Why they are not build straight to save material cost?). Give another example of effect of expansion or contraction in our daily life.