Importance of Oxygen and Carbon Dioxide

Assessment

Importance of Oxygen and Carbon Dioxide

ninja coder

Chemistry

Grade8

10 Plays

100 Participants

Worksheet

10 Qs

1.
Multiple Choice
1 pts•30 s
Oxygen is essential for which life process in humans?
Answer choices
Photosynthesis
Digestion
Respiration
Excretion
2.
Multiple Choice
1 pts•30 s
Carbon dioxide is mainly used by which organism group for food production?
Answer choices
Animals
Fungi
Plants
Insects
3.
Multiple Choice
1 pts•30 s
Green plants absorb carbon dioxide during which process?
Answer choices
Germination
Respiration
Photosynthesis
Fermentation
4.
Multiple Choice
1 pts•30 s
Oxygen helps in burning by supporting which process?
Answer choices
Combustion
Cooling
Melting
Freezing
5.
Multiple Choice
1 pts•30 s
Exhaled air contains more of which gas than inhaled air?
Answer choices
Oxygen
Nitrogen
Carbon dioxide
Hydrogen
6.
Multiple Choice
1 pts•30 s
Oxygen is stored in hospitals mainly for which patients?
Answer choices
Those with fever
Those with cold
Those with breathing problems
Those with broken bones
7.
Multiple Choice
1 pts•30 s
Balance in oxygen and carbon dioxide levels is maintained by which process?
Answer choices
Eating
Breathing
Photosynthesis
Running
8.
Multiple Choice
1 pts•30 s
Human activities increase carbon dioxide in the air mainly through:
Answer choices
Breathing
Planting trees
Burning fuels
Drinking water
9.
Multiple Choice
1 pts•30 s
Oxygen cylinders are used during mountain climbing because:
Answer choices
It helps to digest food
Air is thinner at high altitudes
For heat
To carry water
10.
Multiple Choice
1 pts•30 s
Plants help control carbon dioxide in air through:
Answer choices
Absorption
Photosynthesis
Respiration
Transpiration