Biodiversity

• What should you be able to describe by the end of this video according to the speaker?

  What's meant by biodiversity and deforestation
• What does the variety of all different species of organisms on Earth refer to?

  Biodiversity
• What is the key definition that the speaker emphasizes needing to learn?

  The definition of biodiversity
• Besides referring to the entire Earth, what else can biodiversity refer to?

  An individual ecosystem
• Why is biodiversity considered important for ecosystems?

  Species depend on each other
• How do decomposers help to maintain the environment?

  They break down dead organisms' remains
• What does a high level of biodiversity indicate about an ecosystem?

  The ecosystem is more stable
• What does a greater number of species indicate for the dependency of an ecosystem?

  Less dependent on one species
• How does a fall in the population of a species affect a high biodiversity ecosystem?

  Less likely to affect the ecosystem
• According to the video, who is having a negative effect on biodiversity?

  Humans
• What kind of forests are noted for containing a very rich biodiversity?

  Tropical forests
• Why are large areas of tropical forests being destroyed?

  To provide land
• For what purposes is land often used after deforestation?

  Rice fields or grazing cattle
• What are the crops grown on deforested land sometimes used for?

  To make biofuels