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Worksheetsmid term revision 8
Total questions: 30
Worksheet time: 15mins
Polythene and PVC are examples of
a) Bio degradable substance
b) Thermoplastics
(a) is an example of natural polymer
Name the plastic used for making water pipes
Polythene
PVC
Acrylic
Bakelite
Iron rusts when it is exposed to ______________ and _____________.
Air, Water
Air, Fire
Oxygen, Fire
Fire, Water
Which metal would be suitable for all of the following uses?
# Making aircraft bodies
# Making food containers
# Making overhead power cables
aluminium
mild steel
gold
pure iron
What does deforestation do?
Increases the balance in nature
Decreases natural droughts
Decreases pollution level
Disturbs balance in nature
Can Global Warming occur due to deforestation?
No, because the level of oxygen will be high
Yes, as the carbon dioxide level will be low
No, I don't know what Global Warming is
Yes, as it will increase the amount of carbon dioxide in the atmosphere
Areas where animals are protected from any disturbance to them and their habitat
National Park
Wildlife Sanctuary
Biosphere reserve
Zoo
Species of plants and animals which are found exclusively in a particular area
(a)
If a flame is giving off smoke, this type of combustion is occurring...
Complete combustion
Incomplete combustion
Q2. Which of the following is not the effect of force?
Force can change the shape of object.
Force can change the size of the object.
Force can change the mass of an object.
Force can stop a moving object.
Q4. Which is not the advantage of friction?
Friction helps in walking.
Friction allows us to write on paper.
Cars and buses move safely on roads due to friction.
Friction causes wear and tear.
a liquid can exert pressure on the side of container as well as at the bottom of the container
True
False
If a given force is applied on a smaller area of contact the pressure exerted by it
Decreases
Increases
Does not change
None of the above
The force between two charged bodies is called
electrostatic force
magnetic force
gravitational force
muscular force
Force per unit area is called
Pressure
Dencity
Temperature
Atmosphere
Which statement best describes how humans hear sound?
Sound waves enter the ear canal and increase in amplitude, which causes you to hear the sound.
Sound waves cause parts of the ear to vibrate until the waves are converted to electrical signals, which are sent to the brain.
Sound waves travel into people ears, then the eardrum sends the sound waves to the brain.
Sound waves become sounds when they strike the eardrum inside the ear.
The diagram shows a sound wave traveling through a medium. Which statement best describes how the sound wave is moving through a medium?
The sound wave is creating tensions and accumulations in the medium.
The sound wave is creating an echo inside the medium.
The sound wave is creating compressions and rarefractions in the medium.
The sound wave is creating a mechanical wave in the medium.
