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WorksheetsPRACTICE 22: REVISION CHAPTER 2 – ENERGY
Total questions: 21
Worksheet time: 14mins
What are the consequences (hậu quả) of carbon dioxide production on the environment?
Air pollution
Reduce the Earth's temperature
Increase the biological efficiency (hiệu quả sinh học) of plants
Create renewable resources
Why is the demand for fuel increasing?
Improve the quality of the stove
The Earth's population increases
Use solar energy
Due to population aging (dân số già đi)
Why not use coal or firewood stoves to heat a closed room (phòng kín)?
Waste of fuel
Because coal and firewood produce carbon dioxide, which is harmful to humans
Flammable (dễ cháy) and explosive (phát nổ)
Electrical safety loss
What is the energy of flowing water used for in the picture below?
Sailing
Electricity production
Dry the object
Cooking
What is wind energy used for in the picture below?
Electricity production
Sailing
Dry
Lighting
Which of the following energy sources is not a clean energy source?
Solar energy
Flowing water energy
Wind energy
Energy from coal
The energy in food, coal, oil, and natural gas all come from which energy?
Solar energy
Wind energy
Flowing water energy
Electrical energy
Which system is used to convert flowing water energy into electricity?
Hydraulics (thủy lực)
Turbine
Solar battery
Water wheel
What are the disadvantages of wind energy?
Pollute the environment
Expensive
Make noise
High cost
How many things should not be done to avoid accidents (tai nạn) caused by electricity? (a) (b) (c)
What is the significance of saving electricity?
Contribute to environmental protection
Contribute to water pollution
Contribute to air pollution
Contribute to increasing electricity prices
When you discover that the electrical cord of an electrical appliance (thiết bị điện) in your home is broken, what will you do?
Use your hands to reconnect
Leave the situation alone and tell an adult immediately
Pull the wire
Touch the exposed area
To produce electricity, which of the following energy sources is not used?
Coal
Petroleum
Charcoal
Natural gas
In which of the following cases is electricity used safely?
Plug the chopsticks into the power outlet
Take shelter from the rain (trú mưa) under the power station
Disconnect the power before repairing electrical equipment
Pour water on the burning electric wire
Why should we use compact lamps (đèn compact) instead of incandescent bulbs (bóng đèn dây tóc)?
Because it is suitable for decoration
To save electricity
Because of its compact size
Because the light is easy to see
Why should you turn on the water heater about 15 minutes before bathing and turn it off before bathing?
Let the water have the right temperature
To limit excess hot water after bathing
For safety and energy saving
To stabilize the power line
Which electrical safety rule is being violated by the action in the picture below?
Do not come into direct contact with exposed electrical wires
Special protective equipment must be used when repairing electricity
Avoid contact with areas with high voltage lines and transformer stations
Choose a suitable location to install the electrical switch
Which electrical safety rule is being followed by the action in the picture below?
Use specialized protective equipment to disconnect electrical equipment from the power source when repairing (sửa chữa) electricity
Turn off the power to electrical appliances in the house when there is rain or thunder
Do not come into direct contact with exposed electrical outlets or wires
Avoid contact with areas with high voltage lines and transformer stations
Of the following devices, which one consumes (tiêu thụ) the least amount of electrical energy?
Air conditioner
Electric fan
Steam iron (bàn là hơi nước)
Cooker
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