When coal, oil and natural gas are burnt, they give off __________ and ____________.

• Oxygen

• Carbon dioxide

• Sulfur dioxide

• Nitrogen oxide

Rain water turns into acid rain due to the presence of two acids. They are __________ and ___________.

• Hydrochloric acid

• Carbonic acid

• Nitric acid

• Sulfuric acid

Which of these are the effects of Acid rain to the environment?

• Loss of nutrients in the soil.

• Poor growth of plants due to fallen leaves.

• Rich soil for plant growth.

• Damage to buildings

Darren carried out an investigation on plant growth. He watered the plant with lemon juice. Predict what will happen to the plant after 5 days.

Explain how frogs can be killed by acid rain.

Which of these best decribes recycling?

• A place where plants and animals live together.

• A feeding relationship between plants and animals.

• To reprocess something so that it can be used again.

• The worldwide increase in temperature.

This is an aluminium can. How can it be recycled?

Identify the options that help to conserve water.

• Collecting rain water in a tank and using it for washing the floor.

• A dripping tap.

• Having a shower instead of filling a Bathtub

• Turning taps on when necessary while brushing the teeth.

Semilore wants to use less energy. Which of these options should she practise? Choose all that apply.

• She should leave electrical appliances on at all times.

• She should use energy-saving bulbs.

• She should switch off electricity when not in use.

• She should use solar panels to power her appliances.

Why is it important to ride a bike or walk when you can, rather than use a car or bus?