Make sure you have understood everything in this section (Lessons C8, C9, C10, and C11).
Use the Self-Check below, and the Self-Check & Lesson Review Tips to guide your learning.
This is also a good time to visit your Section 3 Checklist to make sure you have completed all the recommended learning activities.

Unit C Section 3 Self-Check

Instructions


Complete the following 6 steps. Don't skip steps – if you do them in order, you will confirm your understanding of this section and create a study bank for the future.

  1. DOWNLOAD the self-check quiz by clicking here.

  2. ANSWER all the questions on the downloaded quiz in the spaces provided. Think carefully before typing your answers. Review the lessons of this section if you need to. Save your quiz when you are done.

  3. COMPARE your answers with the suggested "Self-Check Quiz Answers" below. WAIT! You didn't skip step 2, did you? It's very important to carefully write out your own answers before checking the suggested answers.

  4. REVISE your quiz answers if you need to. If you answered all the questions correctly, you can skip this step. Revise means to change, fix, and add extra notes if you need to. This quiz is NOT FOR MARKS, so it is perfectly OK to correct any mistakes you made. This will make your self-check quiz an excellent study tool you can use later.

  5. SAVE your quiz to a folder on your computer, or to your Private Files. That way you will know where it is for later studying.

  6. CHECK with your teacher if you need to. If after completing all these steps you are still not sure about the questions or your answers, you should ask for more feedback from your teacher. To do this, post in the Course Questions Forum, or send your teacher an email. In either case, attach your completed quiz and ask; "Can you look at this quiz and give me some feedback please?" They will be happy to help you!

Self-Check Time!

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Self-Check Quiz Answers

Click each of the suggested answers below, and carefully compare your answers to the suggested answers.

If you have not done the quiz yet – STOP – and go back to step 1 above. Do not look at the answers without first trying the questions.

Currently, active solar power is unreliable. On cloudy days, less solar power is generated in solar panels than on sunny days. The batteries available are not adequate for large-scale storage of electricity, and no other effective method is available. This means that other sources of energy are required to generate a reliable flow of electricity.
A house heated with passive solar energy should have lots of south-facing windows. This allows radiation from the Sun to enter and heat the house. North-facing windows should be few, if any.
The coolant leak means that less coolant is available to absorb heat from the fridge. This causes more heat to stay inside the fridge. The fridge temperature increases, and food spoils faster.
Humans use several methods to heat their homes.
  • Heat is transferred to rooms by convection in hot-air furnaces designed to burn oil, natural gas, or wood, blowing warm air through ducts to all rooms. Fireplaces transfer heat to the air of a room by convection.
  • Heat transferred to rooms by radiation in hot water systems heated by boilers in which pipes transport hot water to radiators in each room. Solar heating using the sun shining through windows relies primarily on radiation.The sunshine warms the surfaces as well as the air. Heat pumps extract heat from a water source that has been warmed by a boiler or other means such as geothermal or solar.
  • Conduction is a factor in most heating systems because the heat of air or water is transferred to the objects (pipes, radiators, or ducts) through which the water or air passes. Then, those warm pipes transfer heat by convection to the air around them.
    Insulation slows heat transfer. Insulation keeps homes warm in the winter by preventing heat transfer from a warm house to the cold outdoors. Insulation keeps homes warm in the summer by preventing heat transfer from the hot outdoors to the cool house.