AQA Ecosystems (Biology Paper 2)

Every year scientists have recorded the date when migrating birds arrived at summer breeding grounds in the UK.

The records show that for every 1 °C increase in mean global temperature, the birds arrived one day earlier.

What will the birds be competing for when they arrive at their UK breeding grounds? Check TWO boxes.

• Eggs

• Food

• Light

• Mates

• Oxygen

Every year scientists have recorded the date when migrating birds arrived at summer breeding grounds in the UK.

The records show that for every 1 °C increase in mean global temperature, the birds arrived one day earlier.

Birds that arrive early might survive better than birds that arrive later.

Suggest ONE reason why.

Global temperatures are increasing every year.

This is because of an increase of greenhouse gases in the atmosphere.

Name ONE greenhouse gas.

Global warming affects the migration of animals.

Give ONE other effect of global warming.

Which two human activities cause global warming?

Tick TWO boxes.

• Burning fossil fuels

• Eating vegetables

• Farming cows

• Turning off lights

• Using too much water

Which gas in the atmosphere causes acid rain?

Tick ONE box.

• Carbon monoxide

• Oxygen

• Ozone

• Sulfur dioxide

In 2017, the city of Manchester began a ‘City of Trees’ project. The city council intend to plant 3 million trees over the next 25 years.

The trees will be planted:

• to make woodlands larger

• to make new woodlands

• in parks, streets and in people’s gardens.

How will the trees benefit the people living in Manchester?

Tick TWO boxes.

• By dropping leaves on the streets in autumn.

• By hiding the road signs.

• By helping people relax in outdoor spaces

• By putting soot in the air.

• By reducing the noise pollution.

In 2017, the city of Manchester began a ‘City of Trees’ project. The city council intend to plant 3 million trees over the next 25 years.

The trees will be planted:

• to make woodlands larger

• to make new woodlands

• in parks, streets and in people’s gardens.

How will the trees benefit the environment in Manchester?

Tick TWO boxes.

• By giving more space for car parks.

• By hiding old buildings.

• By making new habitats for plants and animals

• By providing a resting place for migrating birds

• By taking more oxygen out of the air

In 2017, the city of Manchester began a ‘City of Trees’ project. The city council intend to plant 3 million trees over the next 25 years.

The trees will be planted:

• to make woodlands larger

• to make new woodlands

• in parks, streets and in people’s gardens.

It was suggested that 360 000 trees should be planted in the first year.

How many trees would still need to be planted in the remaining 24 years?

Number of trees = ____________________

The council says that planting new trees will increase biodiversity in the area.

What is the definition of biodiversity?

Tick ONE box.

• The arrival of new predators in an ecosystem

• The evolution of new species by natural selection.

• The recycling of carbon in the environment.

• The variety of different species of organisms in an ecosystem.