TBSHS Y9 Geography - World Systems 1: Engine Earth

According to scientists, how old is Planet Earth?

• 4.6 million years

• 4.6 billion years

• 3.8 billion years

• 3.8 million years

What is the name given to our current geological time period?

• Holocene

• Quaternary

• Cretaceous

• Cambrian

Which key term matches this definition?

A system with no inputs and outputs.

• Open system

• Geological time period

• Closed system

Biodiversity of Planet Earth.

Choose the correct statement(s) correct?

• Biodiversity is currently lower than it has ever been

• Planet Earth has experienced 5 mass extinction events

• Overall, biodiversity has increased over time

• The only mass extinction event occurred 65 million years ago

Examples of carbon sinks:

• Soil

• Rocks

• Volcanic eruptions

• Burning

The biggest carbon sink:

• Soils

• Atmosphere

• Rocks

• Oceans

Examples of carbon flows:

• Decomposition

• Atmosphere

• Oceans

• Volcanic eruptions

The long-term carbon cycle

How does carbon flow from rocks to the atmosphere?

Process(es) involved:

• Photosynthesis

• Subduction

• Volcanic eruptions

• Animal respiration

The long-term carbon cycle

How does carbon flow from the atmosphere to the oceans?

Process(es) involved:

• Precipitation

• Outgassing

• River flow

• Chemical weathering

The long-term carbon cycle

How does carbon flow from the ocean store to the rock store?

Which statements are part of this process?

• Sea creatures with shells die and sink to the sea floor

• Carbon dioxide is released to the atmosphere through volcanoes

• Layers of shells and sediment build up and cement together

• Sedimentary rock is formed trapping carbon within it