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WorksheetsChapter 7: Air (Science Form 1)
Total questions: 10
Worksheet time: 10mins
Determine gas (78%)
Oxygen
Nitrogen
Carbon dioxide
Inert gases
What is the importance of gas (21%)
Combustion
Respiration
Photosynthesis
Carbon cycle
What would happen to the Earth if the percentage of carbon dioxide increases?
Global warming
Greenhouse effect
Depletion of ozone
Acid rain
How does logging activities increase the amount of carbon dioxide in the air?
Green plants absorb carbon dioxide for photosynthesis.
Green plants release carbon dioxide during photosynthesis.
Green plants absorb oxygen for respiration.
Green plants release oxygen during respiration.
Which of the following is the condition for combustion?
Heat
Fuel
Oxygen
Carbon dioxide
Which of the following is not the precaution to prevent fire from happening?
Keep matches and lighters in a safe place
Do not throw cigarette butts when they are still burning
Install fire alarm and smoke detector at home
Plug many electrical devices to a single electrical source
What is the environmental problem shown in figure?
Haze
Depletion of ozone
Chlorofluorocarbon (CFC)
Radioactive materials
Plants with soil, ants, beetles and earthworms was put in closed glass jar. Can they survive for a long period of time? Why?
Yes. Plants will provide oxygen to the small animal by photosynthesis.
Yes. Plants will provide oxygen to the small animal by respiration.
No. Plants will not provide oxygen to the small animal by photosynthesis.
No. Plants will not provide oxygen to the small animal by respiration.
What would happen to the plants and small animals in the closed glass jar if it is kept in a dark place for a month? Why?
All the living things in the glass jar die due to lack of oxygen, photosynthesis does not occur.
All the living things in the glass jar die due to lack of carbon dioxide, photosynthesis does not occur.
All the living things in the glass jar are still alive due to sufficient oxygen from photosynthesis.
All the living things in the glass jar are still alive due to sufficient carbon dioxide from photosynthesis.
The bus is more environmentally friendly than a car. 50 cars produce 250000kg of carbon dioxide per year. This bus produces only 3000kg of carbon dioxide per year. What can you know from this message?
Taking public transport can help to minimise air pollution.
Riding car can help to minimise air pollution.
Taking public transport increases air pollution.
Riding car does not cause air pollution.
