Changing Biomes

Changing Biomes

Open Ended

Identify 2 reasons why forests may be cleared (cut down).

Multiple Choice

What do you think is the cause of the deforestation shown in this image of Sydney? (The area that isn't dark green is the deforested bit)

• Making room for farms

• Cutting down tress to make paper

• Cutting down trees to graze cattle

• Making room for more housing

Open Ended

Why does removing vegetation reduce biodiversity?

Multiple Choice

How does soil become too saline (salty) when land is cleared and irrigated for farming?

• The extra water that is used to grow the crops seeps deep into the ground, and draws salt up to the surface with it as it evaporates.

• Some crops have lots of salt in their roots, which they leave behind when they are harvested to be sold

• The water that farmers obtain from rivers is often slightly salty, and the salt in the soil builds up over time

Open Ended

What is one of the environmental problems caused by mining?

Fracking

Fracking is the process of drilling down into the earth before a high-pressure water mixture is directed at the rock to release the gas inside. Water, sand and chemicals are injected into the rock at high pressure which allows the gas to flow out.

Multiple Choice

Fossil fuels are nonrenewable because...

• they are used to produce heat

• they take a long time to form

• they can be found underground

Multiple Choice

Which of the following is not a type of fossil fuel? 

• Coal

• Light

• Petroleum

• Natural Gas

Multiple Choice

Why do we depend on fossil fuels? 

• Electricity, transportation, and heating

• Food

• Sunlight

• Growing, building muscle, calcium

Multiple Select

Why is the world continually searching for new sources of energy?

• The world's population is growing, and each person needs energy to help their bodies grow

• The world's population is growing, and each person needs energy for things like air conditioning, running appliances and transport

• Some sources of energy, such as fossil fuels, are being used up, so it becomes harder to find new reserves

• Energy companies can make a lot of money by selling energy (e.g. oil and gas)

Multiple Choice

Fracking is another term used for?

• Water Fracturing

• Oil Fracturing

• Hydraulic Fracturing

• Hydro Fracturing

Multiple Choice

Which of the following is TRUE of hydraulic fracturing?

• It uses very little water

• It does not create environmental concerns

• it uses water, sand, and chemicals to break rock formation

• all of these answers are correct

Multiple Choice

What type of gas does fracking aim to release?

• Oxygen

• Nitrous oxide

• Methane (natural gas)

• Carbon dioxide

Multiple Select

Select arguments against fracking.

• Fracking can cause earthquakes.

• Fracking releases much needed natural gas.

• We should not be looking for new sources of fossil fuel as they cause climate change.

• Fracking creates jobs.

• Fracking can cause contamination (pollution) of groundwater.

Multiple Choice

Why might fracking cause the water to become flammable?

• The water gets very hot from all of the mining activities

• The water could have petrol inside it that has leaked from all the machinery used in the mine

• The gas leaks through the cracks created and into the water supply

Poll

Should we allow Fracking in Australia?

• Yes

• No