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WorksheetsSec 3NT Science Revision
Total questions: 15
Worksheet time: 15mins
Hakkim's father wears an Apple Watch Series 6. Which type of energy does the watch use?
Gravitational Potential Energy
Kinetic Energy
Light Energy
Chemical Potential Energy
When ice cubes are put into hot milo, thermal energy is.......
produced by the ice
produced by the cup
is transferred from the ice to the milo
is transferred from the milo to the ice
A microwave converts (1)................ to (2) .....................
(1) electrical energy (2) thermal energy
(1) chemical potential energy (2) microwave energy
(1) electrical energy (2) chemical potential energy
(1) chemical potential energy (2) light energy
Which of the following waves is used by a forgery checker to detect fake money?
Gamma rays
X-rays
Ultraviolet
Infrared
If the frequency of a wave is 15Hz, how many wavelengths are produced in 20 secs?
5
300
35
1.33
The speed of a moving object increases from 5m/s to 15m/s in 5s. What is the acceleration of the object?
2m/s2
3m/s2
20m/s2
75m/s2
When a force is applied to a pivoted object, ______________.
a load is produced
an effort is produced
a moment is produced
a pushing force is produced
a pulling force is produced
Which of the following can be used to vary (increase or decrease) the current of a series circuit?
Fuse
Ammeter
Variable resistor
Switch
Voltmeter
A series circuit consisting of two 1.5V batteries and a lightbulb was prepared by Aliyah. An ammeter attached to the circuit gave a reading of 3A. What is the resistance of the lightbulb?
1Ω
4.5Ω
6Ω
5Ω
2Ω
Keng Hong accidentally touched a metal toaster with his wet hands and was electrocuted. Which of the following safety features could have saved him?
One or more of the options maybe right.
Double insulation of wires
Earth Wire
Fuse
Circuit Breaker
What is the reason why electricity is transmitted in high voltage?
Transformers can be used
Allow the use of overhead cables
It is the safest way to transmit electricity
Reduce loss of energy during transmission
Which mixture can be separated by adding water, stirring and filtering?
Nitrogen and oxygen
Chalk and common salt
Common salt and sugar
Hydrochloric acid and nitric acid
Ramu mixed hydrochloric acid and calcium carbonate together in a test tube. What is result of this mixing?
A salt and water is produced
A salt and hydrogen gas is produced
A salt, carbon dioxide gas and water is produced
No reaction occured
What do plants require to make food?
One or more options maybe correct.
Carbon dioxide
Sunlight
Fertiliser
Water
Oxygen
The following is an example of a food chain.
Plant --> Caterpillars --> Mynah --> Hawk
If pesticides were used to kill the caterpillars, what will happen to the animals in the food chain?
The plants will stop growing immediately.
All the birds will also be killed immediately.
The birds will die of poisoning.
There will be fewer mynahs and even fewer hawks after some time.
The mynahs will begin to eat the plants instead.
