Biodiversity
4 Spheres
Human Impact
Definitions
Environmental Processes
100

Every species has a preferred temperature range. For example, polar bears thrive in cold climates, while cactus plants need hot, dry environments. If the temperature changes too much, plants and animals may not be able to survive in their current locations.

The climate influences which plants grow in an area, which in turn affects the animals that can live there. If a plant species dies out due to climate changes, animals that depend on it may also struggle to survive

How does climate impact biodiversity with examples

100

Rain, Rivers, Oceans belong to this sphere

What is the hydrosphere?

100

The destruction of rainforests for natural resources

What is deforestation?

100

a specific place on Earth and all the things, both animate and inanimate, that are there.

What is an environment?

100

flow of water occurring on the ground surface when excess rainwater, stormwater, meltwater, or other sources, can no longer sufficiently rapidly infiltrate in the soil

What is runoff?

200

As altitude increases, temperature generally decreases. This means that plants and animals that live at higher altitudes must be adapted to colder conditions. For example, only certain types of plants can grow on mountain tops where it’s much cooler, while warmer-climate species are found at lower elevations.

How does altitude impact biodiversity 

200

rigid, rocky outer layer of the Earth

What is the lithosphere?

200

the presence or introduction into the environment of a substance which has harmful or poisonous effects

What is pollution?

200

refers to the variety of living organisms on the planet

Biodiversity

200

geological process were materials are worn away and transported by natural processes.

What is erosion

300

Climate change, fires, drought, flooding, and diseases 

What natural factors can impact biodiversity 

300

The interaction between these two spheres produce rainfall

What is the interaction between the hydrosphere and atmosphere

300

Medicine, material for shelter, food, fibre, fuel 

What biological resources can humans get from the environment 

300

Genetics, Species and Ecosystem 

What is GSE

300
  • Evaporation: The sun heats up water in rivers, lakes, and oceans, turning it into vapor that rises into the air.

  • Condensation: As the water vapor cools in the atmosphere, it forms clouds through a process called condensation.

  • Precipitation: When clouds get heavy, water falls back to Earth as rain, snow, sleet, or hail.

  • Collection: The water returns to oceans, rivers, and lakes or soaks into the ground, where it becomes groundwater. From there, the cycle begins again.

What is the water cycle? 

400
  • Controlling Populations: They keep prey numbers in check, stopping any one species from taking over and using up resources.

  • Keeping Populations Healthy: Predators often target weaker or sick animals, keeping prey populations stronger and reducing disease spread.

  • Supporting Variety: By controlling prey, they allow more species to share the environment and thrive. For example, if herbivores were unchecked, they might eat all the plants, leaving nothing for other species.

  • Balancing the Food Web: Without predators, ecosystems can become unbalanced, affecting plants, animals, and even soil and water quality.

What role do predators play in maintaining biodiversity 

400

How are all the spheres connected?

All the spheres interact with other spheres. For example, rain (hydrosphere) falls from clouds in the atmosphere to the lithosphere and forms streams and rivers that provide drinking water for wildlife and humans as well as water for plant growth (biosphere).

400

consequences of these human processes: replacement of natural environments with roads, buildings and manicured parklands

What are consequences of urbanisation and urban growth?

400

a result or effect, typically one that is unwelcome or unpleasant

What is the definition of consequence?

400

Photosynthesis, Food chains/webs, Species evolution, migration and extinction, Carbon cycle

What are some processes that occur in the biosphere?