N5 Computing Science: Environmental Impact

What is believed to be the main cause of man-made climate change?

• Decreased use of fossil fuels

• Increased release of greenhouse gases

• Reduction in global temperatures

• Increased use of renewable energy sources

Answer explanation

Increased release of greenhouse gases is believed to be the main cause of man-made climate change.

How does use of computers contribute to climate change?

• By using water resources inefficiently

• Through the consumption of electricity to power them

• By emitting chemicals directly into the atmosphere

• Through the use of biodegradable materials

Answer explanation

The use of computers contributes to climate change through the consumption of electricity to power them.

In N5 Computing Science you should be able to describe how to reduce computer energy use by adjusting what?

• Internet settings

• Monitor settings

• Keyboard settings

• Application settings

Answer explanation

In N5 Computing Science, you can reduce computer energy use by adjusting monitor settings.

Which of the following is a way to reduce computer energy use?

• Using high-performance computer parts

• Set power down options

• Increasing screen brightness

• Keeping the computer on at all times

Answer explanation

Setting power down options is a way to reduce computer energy use by putting the system into a low-power state when not in use.

What is one of the learning objectives in this topic related to computer energy use?

• To increase the energy consumption of computers

• To explain why energy use by computers is beneficial to the environment

• To explain why energy use by computers can be harmful to the environment

• To promote the constant use of computers without breaks

Answer explanation

To explain why energy use by computers can be harmful to the environment

What is meant by the greenhouse effect?

• People have to grow more food in greenhouses because of cold winters.

• The earth's atmosphere is heating up due to certain gases trapping solar radiation.

• More of the earth is being covered by glass structures.

• The earth's atmosphere is cooling down due to certain gases reflecting solar radiation.

Answer explanation

The earth's atmosphere is heating up due to certain gases trapping solar radiation.

What is the main greenhouse gas released when generating electricity?

• Carbon dioxide (CO2)

• Di-hydrogen oxide (H2O)

• Sulphur dioxide (SO2)

• Helium (He)

Answer explanation

The main greenhouse gas released when generating electricity is Carbon dioxide (CO2), making it the correct choice among the options provided.

According to Figure 3.1, how much energy does this desktop computer consume when running?

• 100 W

• 200 W

• 300 W

• 400 W

Answer explanation

According to Figure 3.1, the desktop computer consumes 200 W of energy when running, making the correct answer choice 200 W.

If a desktop computer runs for just 2 hours, how many Watt-hours (Wh) of energy will it have consumed?

• 100 Wh

• 200 Wh

• 400 Wh

• 800 Wh

Answer explanation

If a desktop computer runs for 2 hours, and assuming it consumes 200 Watts per hour, the total energy consumed would be 400 Wh (2 hours * 200 Watts). Therefore, the correct answer is 400 Wh.

What is the energy consumption of a 'Gaming' desktop computer according to Table 3.1?

• 200 W

• 350 W

• 85 W

• 120 W

Answer explanation

According to Table 3.1, the energy consumption of a 'Gaming' desktop computer is 350 W, making the correct answer choice 350 W.