Bio-Geology and Earth's Spheres

What is the biosphere?

• The solid part of Earth

• The area where life exists, interacting with other spheres

• The water on Earth

• The gases on Earth's surface

How did cyanobacteria impact the Earth's atmosphere?

• By producing oxygen through photosynthesis

• By producing nitrogen

• By consuming oxygen

• By creating carbon dioxide

What is a significant human activity that changes the environment?

• Burning fossil fuels

• Natural erosion

• Volcanic eruptions

• Photosynthesis

What event led to the extinction of dinosaurs?

• A gradual climate change

• A meteor impact that changed the climate

• A volcanic eruption

• A sudden ice age

What concept explains the continuous adaptation of life to changing landforms?

• Nitrogen cycle

• Photosynthesis

• Coevolution

• Carbon cycle