Test: Air and Water - 1 - Class 3 MCQ

Asma took two balloons. She blew air with mouth in one balloon and she filled another balloon with the vapours of boiling water. She released the two balloons and observed that the balloon with the hot vapours rose higher than the other balloon. What did she learn from this experiment?

When we blow air into a balloon it expands. What is the reason?

Which of the following does NOT disturb the balance of gases in the air?

Which of the following changes weather?

Read the data given below and answer questions 8 and 9. Jasmine conducted an experiment. She took two bowls of sand and water and placed them in sunlight. After an hour she noted the temperatures. Then she took both into her house and placed them where there was no light. She noted the temperatures again after one hour and made the following observations.

What is the increase in the temperature of the sand after being placed for an hour in the sunlight?

Read the data given below and answer questions 8 and 9. Jasmine conducted an experiment. She took two bowls of sand and water and placed them in sunlight. After an hour she noted the temperatures. Then she took both into her house and placed them where there was no light. She noted the temperatures again after one hour and made the following observations.

After being placed in sunlight for an hour, the air present above the sand bowl is ____ than the air above the water bowl.

Answer questions 10 based on the following figure.