Earth Science Unit 6: Biosphere Review4

Front

What is the carbon cycle?

Back

The carbon cycle is the process by which carbon is exchanged among the atmosphere, land, water, and living organisms. It includes processes like photosynthesis, respiration, decomposition, and combustion.

Front

How do marine organisms contribute to the carbon cycle?

Back

Marine organisms contribute to the carbon cycle through respiration, which adds carbon dioxide to the atmosphere, and photosynthesis by phytoplankton, which removes carbon dioxide from the atmosphere.

Front

What is biodiversity?

Back

Biodiversity refers to the variety of life in a particular habitat or ecosystem, including the number of different species and the genetic diversity within those species.

Front

How does reduced biodiversity affect crops?

Back

Reduced biodiversity can make crops more vulnerable to diseases and pests, as there are fewer genetic variations to resist threats.

Front

What are biotic and abiotic factors?

Back

Biotic factors are the living components of an ecosystem (e.g., plants, animals), while abiotic factors are the non-living components (e.g., water, soil, temperature).

Front

What is an estuary?

Back

An estuary is a coastal area where freshwater from rivers meets and mixes with saltwater from the ocean, creating a unique ecosystem.

Front

What role do forests play in carbon absorption?

Back

Forests are significant carbon sinks, absorbing large amounts of carbon dioxide from the atmosphere through the process of photosynthesis.

Front

What happens when an ecosystem exceeds its carrying capacity?

Back

When an ecosystem exceeds its carrying capacity, it can lead to resource depletion, habitat degradation, and a decline in the population of species.

Front

What is the significance of photosynthesis in the carbon cycle?

Back

Photosynthesis is crucial in the carbon cycle as it converts carbon dioxide from the atmosphere into organic matter, providing energy for plants and oxygen for other organisms.

Front

What is the impact of volcanic eruptions on the carbon cycle?

Back

Volcanic eruptions can release carbon dioxide into the atmosphere, contributing to the carbon cycle and potentially affecting climate.