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Questions and Answers
What is wind called when it is in motion?
What is wind called when it is in motion?
- Air in motion (correct)
- Breezy air
- Atmospheric flow
- Gas movement
Which gas is a major portion of our atmosphere?
Which gas is a major portion of our atmosphere?
- Nitrogen (correct)
- Water vapour
- Oxygen
- Carbon dioxide
What is the envelope of air that surrounds the earth known as?
What is the envelope of air that surrounds the earth known as?
- Atmosphere (correct)
- Gas blanket
- Atmospheric cover
- Air layer
What does smoke consist of?
What does smoke consist of?
What does carbon dioxide support?
What does carbon dioxide support?
What shows the direction in which the air is moving at a specific place?
What shows the direction in which the air is moving at a specific place?
Which gas supports burning in the air?
Which gas supports burning in the air?
What is the main gas present in the air?
What is the main gas present in the air?
What is the percentage of carbon dioxide in the air?
What is the percentage of carbon dioxide in the air?
What do animals take in from the air during respiration?
What do animals take in from the air during respiration?
How do plants use carbon dioxide from the air?
How do plants use carbon dioxide from the air?
Where is carbon dioxide produced when burning something?
Where is carbon dioxide produced when burning something?
What do wet clothes drying on a clothesline indicate about the presence of water vapour?
What do wet clothes drying on a clothesline indicate about the presence of water vapour?
What process takes place when glucose in the body breaks down to give energy?
What process takes place when glucose in the body breaks down to give energy?
Apart from dust particles, what else does air contain?
Apart from dust particles, what else does air contain?
Which gas is used by plants and animals for respiration?
Which gas is used by plants and animals for respiration?
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Study Notes
Atmospheric Concepts
- Wind in motion is called airflow.
- Nitrogen is the major portion of our atmosphere, making up about 78% of the air.
- The envelope of air that surrounds the Earth is known as the atmosphere.
Composition of Air
- Smoke consists of particles suspended in the air.
- Carbon dioxide supports burning in the air.
- Oxygen is the main gas present in the air, making up about 21% of the atmosphere.
- Carbon dioxide makes up about 0.03% of the air.
Respiration and Photosynthesis
- Animals take in oxygen from the air during respiration.
- Plants use carbon dioxide from the air during photosynthesis to produce glucose.
- Carbon dioxide is produced when burning something, such as wood or fossil fuels.
Water Vapour
- Wet clothes drying on a clothesline indicate the presence of water vapour in the air.
- Air contains water vapour, apart from dust particles.
Cellular Respiration
- When glucose in the body breaks down to give energy, cellular respiration takes place.
Biological Roles of Gases
- Oxygen is used by plants and animals for respiration.
- Carbon dioxide is used by plants during photosynthesis.
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