Level: JHS, Basic 7 | Subject: Integrated Science | Strand: Forces and Energy | Topic: Heat Transfer
Read the summary notes first, then try these questions. Go back to the summary notes for this topic.
Part A has 20 tick-box questions. Part B has 5 essay questions with a marking guide at the bottom.
Test Yourself: 20 Objective Questions
Tick one answer for each question, then press Review answer. If your answer is wrong, it will be marked first, then the correct answer will show in green.
1. Heat is a form of energy that flows from
2. Temperature is measured with a
3. The unit of temperature used in school is
4. The transfer of heat from particle to particle in solids is called
5. The transfer of heat by the movement of a heated liquid or gas is
6. The transfer of heat as waves that need no material is
7. Heat from the Sun reaches the Earth by
8. A metal spoon left in hot soup becomes hot because of
9. Which of these is the best conductor of heat?
10. Which of these is a good insulator of heat?
11. Cooking pots are made of metal because metals
12. The handles of cooking pots are made of wood or plastic because they
13. In a pot of boiling water, heat is carried through the water mainly by
14. Hot air rises because it is
15. You feel warm when you sit near a charcoal fire mainly by
16. Wearing light-coloured clothes in hot weather helps because they
17. A vacuum flask keeps liquids hot because it
18. Which statement about solids is TRUE?
19. Houses have ventilation near the roof so that
20. Which does NOT need a material to travel through?
Essay Questions
- (a) What is heat? (b) Name the three methods of heat transfer. (5 marks)
- Explain conduction and give two examples from your home. (6 marks)
- Describe a simple activity to show convection in water. (5 marks)
- Why are cooking pots made of metal but have handles of wood or plastic? (4 marks)
- State four ways in which heat transfer is useful in our daily lives. (5 marks)
Essay Questions: Marking Guide for Teachers and Parents
- (a) A form of energy that flows from a hot object to a cold object (2). (b) Conduction, convection, radiation (1 mark each, total 3).
- Conduction is the transfer of heat from particle to particle in a solid without the solid moving (3). Examples: a metal spoon in hot soup; the handle of a metal pot becomes hot (1 mark each, total 2). One mark for good expression.
- Fill a beaker with water and drop in some potassium permanganate crystals (1). Heat the beaker from below (1). Coloured water rises in the middle (1) and sinks at the sides (1). This shows convection currents (1).
- Metals are good conductors so heat passes quickly to the food (2). Wood or plastic are poor conductors so the handle does not burn our hands (2).
- Any four: cooking with metal pots, ventilation in houses, light clothes in hot weather, vacuum flask, drying clothes and fish in the sun, ironing, roofing with shiny sheets (1 mark each, total 4; 1 mark for clear explanation).
Education Always (education.inspiringalways.com). Original practice questions, not official WAEC or BECE questions.