the range of different living organisms that live in a place

the benefits that nature provides to human wellbeing and quality of life

having enough food to feed the human population

when a resource is produced as quickly as it is removed from the environment so that it does not run out

the process of protecting biodiversity and the environment

Benefits and challenges of maintaining biodiversity

Combined science

Negative human interactions with ecosystems and impacts on biodiversity

Examples of human interactions with ecosystems, including fish farming

Climate change and biodiversity: forests and oceans

Pupils learned about biotic and abiotic components of an ecosystem, measuring population size, interdependence and competition in ecosystems, how changes in biotic and abiotic factors affect communities, the cycling of carbon and water, and the role of microorganisms in cycling materials through ecosystems.

This unit explores trophic levels, biomass pyramids, and the efficiency of biomass transfers in ecosystems. It examines human impacts on biodiversity, factors affecting food security, and biotechnological solutions. Emphasis is on evaluating environmental changes and ethical considerations.

Maintaining biodiversity and human impacts

Ecosystem services are how nature helps humans to...

A small number of different species within an ecosystem.

A large number of individuals within an ecosystem.

A small number of individuals within an ecosystem.

A high number of different species within an ecosystem.

What term is used to describe how organisms of different species rely on each other?

The ability for a resource to be maintained at the same rate that it is used up is known as...

an excess of food (which is stored) to feed the human population. 

not enough food to feed the human population.

enough food to feed all organisms within an ecosystem.

enough food to feed the human population.

Genetic biodiversity can be conserved using which of the following?

availability of moisture within the ecosystem

Which of the following factors does **not** affect the rate of decomposition within an ecosystem?

Many habitats such as peat bogs are being destroyed. It is important to stop habitat destruction to maintain...

The interactions between populations of different species in a habitat.

The number of individuals of one species in a habitat.

The number of populations within a habitat.

Which definition below explains what a community is?

All habitats are destroyed and species become extinct.

New habitats are created that attract many more new species.

Some habitats are destroyed and species can no longer live there.

All of the animals have to learn to eat new species.

How does human land use for building new homes and roads reduce biodiversity levels?

More oxygen is released into the atmosphere by photosynthesising plants.

Clearing forests by burning releases carbon dioxide into the atmosphere.

Less plants take in less carbon dioxide from the atmosphere for photosynthesis.

Deforestation releases nitrogen in the atmosphere when trees are burned.

How does deforestation impact climate change?

They provide them with food that helps them grow quickly.

They replicate conditions in their natural environment.

They give them the food that they would get in the wild.

How do fish farmers help to ensure that fish grow quickly so that they can sell them as food for the population?

Starter Quiz

Which of the following factors does not affect the rate of decomposition within an ecosystem?