1. Find equivalents:

2. Complete the sentences:

1. A unit is

2. To measure length ancient people used

3. Measurements of weight was originally based on

4. We are provided by marks of time by

5. Leap year has

6. About 5,000 years ago the Egyptians were the first people to measure and divide their days into.

7. The Dutch scientist Christian Huygens invented

8. The force that you exert on the Earth is called

9. Scientists measure mass in and weight in.

10. Force is

11. You apply a force on something when you

12. The greater the force, the smaller

13. When travelling in a spaceship … is quite a meaningless term.

14. All motion requires force to

3. Answer the questions:

1. What measurements are there in physics?

2. What did the Greeks use as a basic unit of length?

3. Why does a full day and night on the Earth consist of 24 hours?

4. How many days are there in a lunar month?

5. Why does the Earth year contain 365 days?

6. What did the first timepieces include?

7. What is weight the result of?

8. What is the difference between weight and mass?

9. What does the mass indicate?

10. How can the force influence objects?

11. What does the amount of pressure depend on?

12. How can we get the idea of our speed?

13. What did the German physicist Albert Einstein prove?

14. Why are still objects constantly in motion?