Very Short Question Answers: Air Around us

Q1: We can see air around us. True/False.

Ans: False

Q2: We cannot see air but can ___________________ it.

Ans: Feel

Q3: Why pages of an open book begin fluttering when the fan is switched on?

Ans: Because of air

Q4: Moving air helps in flying kite. True/ False

Ans: True

Q5: When does winnowing is more effective?

Ans: In presence of air

Q6: Which of the two can uproot trees and blow off the roof tops, air or storm?

Ans: Storm

Q7: State two properties of air.

Ans: Air has weight and it occupies space.

Q8: What is air made up of?

Ans: Gases

Q9: The presence of water vapour in air is important for:

a. Combustion

b. Water cycle

c. Air pollution

d. All of these

Ans: Water cycle

Q10: Air has

a. Oxygen

b. Carbon dioxide

c. Nitrogen

d. All of these

Ans: All of these

Q11: Air is the ____________________ of gases.

Ans: Mixture

Q12: Define atmosphere.

Ans: Atmosphere is a thick layer of air surrounding the earth.

Q13: Air occupies______________ and has________________.

Ans: Space and has weight

Q14: Name the gas which forms the major part of air.

Ans: Nitrogen

Q15: Nitrogen supports burning of a candle. True/ False.

Ans: False

Q16: Animals consume oxygen for ___________________ and produce carbon dioxide.

Ans: Breathing

Q17: Dust particles are always present in air. True/ False.

Ans: True

Q18: Ram is breathing with his mouth, is it right? If no why?

Ans : No, because dust particles may enter into his body.

Q19: Have you ever seen tiny shining particles in the beam of sunlight, what are these particles?

Ans: Dust particles

Q20: Fine hair and ______________ present inside our nose prevents the entry of dust particles into our respiratory system.

Ans : Mucus

Q21: Name the gases present in atmosphere.

Ans: Nitrogen, oxygen, carbon dioxide, water vapour, dust particles and other gases.

Q22: What is the percentage of oxygen in the air?

Ans: 21%

Q23: What is the percentage of nitrogen in the air?

Ans: 78%

Q24: Which of the two gases are present in higher amount in the atmosphere oxygen or carbon dioxide gas?

Ans: Oxygen

Q25: A person is facing breathing difficulty, he will use

a. Oxygen mask

b. Water mask

c. Pollution mask

d. None of these

Ans: Oxygen mask

Q26: Name the component of air used by plants to make their food.

Ans: Carbon dioxide gas

Q27: The layer of air around the earth is known as______________________.

Ans: Atmosphere

Q28: How does an earthworm breathe?

Ans: Through air present in soil.

Q29: Name the food manufacturing process of plants.

Ans: Photosynthesis

Q30: The ____________________is used to draw water from tubewells and to run flourmills.

Ans: Air