WorksheetsSCIENCE FORM 1: CHAPTER 7 AIR
Total questions: 43
Worksheet time: 22mins
The air is made up of _____% Nitrogen.
87
78
76
How to test the presence of Oxygen?
Use lime water
Use glowing wooden splinter
Use burning wooden splinter
Use litmus paper
How to test the presence of Hydrogen?
Use burning wooden splinter
Use glowing wooden splinter
Use litmus paper
Use limewater
Oxygen helps in __________.
(more than 1 answer)
Photosynthesis
Combustion
Make dry ice
Make carbonated drinks
Respiration
____________ helps in photosynthesis.
Inert gas
Oxygen
Carbon dioxide
Nitrogen
What is this process?
combustion
decomposition
respiration
rusting
photosynthesis
Carbon + Oxygen → ____________
Water
Nitrogen
Carbon dioxide
Hydrocarbon
Gas P is
Oxygen
Nitrogen
Carbon dioxide
Inert gas
Gas Q is
Oxygen
Carbon dioxide
Nitrogen
Inert gas
Gas R is
Oxygen
Nitrogen
Carbon dioxide
Inert gas
Why air is considered a mixture ?
Each gas has no color, so cannot be differentiate
Each gas still shows its original properties when separated.
The gas is used to fill up light bulbs
Helium
Neon
Argon
A layer that surrounds the Earth
Atmosphere
Cloud
Sky
The gas is needed in combustion
Carbon dioxide
Oxygen
Hidrogen
What is environmental problem shown?
Covid 19
Haze
Greenhouse effect
Two effect of the problems from the picture
Causes breathing difficulties and cough
Can cause lung cancer
The visibility distance is limited/ shorter.
Can cause greenhouse effect
The road accident rate increase when this happen. Why?
Causes breathing difficulties and cough
The visibility distance is limited / shorter.
Why oxygen level decrease in cave?
decay of organisms ike dead bats in the cave
the space in cave is very small
respiration of bats or other animals inside the cave
What advantage of people use torch instead of torchlight?
It is brighter
To know the presence of oxygen
Which made up the highest composition of air?
Nitrogen
Oxygen
Carbon dioxide
Water vapour
What is air?
Element
Compound
Mixture
Which of these below are inert gases?
Xenon
Krypton
Helium
Hydrogen
Which is NOT the product of combustion?
Carbon Dioxide
Heat
Light
Oxygen
Which gas creates green house effect in the atmosphere?
Carbon dioxide
Ozone
Oxygen
None of these
As we go up to the layers of atmosphere, the pressure
Increases
Decreases
Remains the same
-Combustion of rocket engine
-Welding and steel cutting
are examples of importance of ........
- production of carbonated drinks
-Fire extinguisher
-carbon cycle
are examples of importance of ...
-Nitrogen Cycle
-Liquid nitrogen as cooling agent
are examples of importance of ...
-Advertising lights
-lights bulbs
uses.........
Air is a _________ of various gases, water vapour, dust and microorganisms
element
compound
mixture
99% of air is made up of (tick 2 answers)
Nitrogen
Carbon dioxide
Inert gases
Oxygen
This gas is used in fire extinguisher
Oxygen
Carbon dioxide
Helium
Nitrogen
_______ used in signboards lightings
Argon
Neon
Helium
Krypton
Nitrogen gas is used for
breathing
food packaging industry
Carbon cycle is the cycle that
maintains the content of carbon dioxide by continuously taking carbon dioxide from the air and returning it to the air
maintains the content of oxygen by continuously taking oxygen from the air and returning it to the air
Oxygen cycle is the cycle that
maintains the content of carbon dioxide by continuously taking carbon dioxide from the air and returning it to the air
maintains the content of oxygen by continuously taking oxygen from the air and returning it to the air
Three conditions needed for combustion (tick 3 answers)
Fuel
Heat
Oxygen
Carbon dioxide
