Natural Science Grade 8 June

The process by which energy is released from food in a series of chemical reactions.

• Photosynthesis

• Respiration

• Ecosystems

• Food webs

The study of interactions of organisms with one another and with the physical and chemical environment in which they are found.

• Photosynthesis

• Respiration

• Ecosystmes

• Food webs

The ecological interactions are:

• Biosphere

  Ecosystems

  Communities

  Preparations

• Mutualism

  commensalism

  Parasitism

• Herbivores

  Carnivores

  Insectivores

  Predators

• Biosphere

  Ecosystems

  Communities

  Populations

is the sum total of all the ecosystems on Earth.

Both parties benefit from the relationship.

• Commensalism

• Parasitism

• Mutualism

Animals that only feed on plants.

• Carnivore

• Herbivore

• Omnivore

• Insectivore

Animals that feed on animals that are already dead.

• Predators

• Carnivores

• Herbivores

• Scavengers

Carnivores that hunt for their food.

• Predators

• Scavengers

• Herbivores

• Carnivores

A stable balance in the number of each species in an ecosystem.

• Ecosystems

• Ecological balance

• Food pyramid

• Food web

Name the two factors that could infleunce the balance of an ecosystem.

• Environmental factors

• Population factors

• Human factors

• Natural factors