1. Each planet has its own gravity
2. Here on Earth we measure gravity using a scale.
3. The coefficient of friction for two materials may differ depending on the type of friction involved.
4. Other types of friction include rolling friction and fluid friction.
5. Scientists often like to use the word mass instead of weight.
6. MRI machines in hospitals use magnetism to make a picture of the inside of your body.
7. Invention of electronic computers is one of the greatest achivements of mankind.
15. Work in pairs. Make up 5 questions to the text and let your partner answer them.
16. Put as many questions to each sentence as possible.
1. Magnets have two opposite ends.
2. Computer technology is a growing industry.
3. Electromagnets have many practical uses.
4. Computer can conduct experiments.
5. Magnetism involves electrons and electricity.
6. Much work has been done to create artificial intellect.
7. The development of science has increased man's knowledge.