1. Wel come
Produced By
ASIF SIR

2. UNIT:7
Biorhythm
Biological Clocks

3. Some French scientists did an experiment with squirrels.

4. They put sugar water in a naturally lighted room everyday at 10:00 a.m.The squirrels came to drink the water exactly at the right time.

5. Then the scientists started putting the sugar water in a room that was artificially lighted for 24 hours. They put the water at 8:00 p.m.

6. It took the squirrels one week to find out the sweet water
It took the squirrels one week to find out the sweet water. But then they started coming in the evening instead of in the morning.

7. Then the scientists took the squirrels to New York
Then the scientists took the squirrels to New York. They came out for their food when their bodies told them, but it was only 3:00 p.m. in New York. Their bodies were still in ‘Paris time’.

8. HOME WORK
Find out the incorrect spellings and write the whole sentence again. 1.Some French scientists did an axperiment with squirels. 2.They put the woter at 8:00p.m. 3.There bodyes were steal in Peris.

9. -Read the paragraph carefully and answer the following questions (1) Which two cities are mentioned in the paragraph? (2) Did the scientists put the salt water in the room? (3) With which animal did the scientists do the experiment? (4) Find out the similar word of: ‘in place of’.