Gr. 7 Science & Technology Perspectives - Ch. 4

A community is all of the organisms of a particular species that live in an area.

• TRUE
• FALSE

Mutualism is a relationship between two species in which one species benefits.

• TRUE
• FALSE

Abiotic elements of an ecosystem include air, water, and sunlight.

• TRUE
• FALSE

Every ecosystem is made up of ________________ , or living, elements, and __________________ , or non-living, elements.

• abiotic, biotic
• biotic, abiotic
• bionic, abionic
• human, vampire

An organism's _________________ is the environment in which the organism lives.

• house
• ecosystem
• shell
• habitat

A squirrel competes for resources with:

• dandelions
• hawks
• chipmunks
• zombies

Grass completes for resources with:

• dandelions
• hawks
• chipmunks
• Chewbacca

An owl competes for resources with:

• dandelions
• hawks
• chipmunks
• Voldemort

In Lake Ontario, tiny shrimp-like organisms called Diporeia eat algae and other producers. In the 1980s and 1990s, zebra mussels were carried into Lake Ontario by boats. Zebra mussels also eat algae. Over time, zebra mussels have eaten so much algae that many Diporeia do not have enough food. The relationship between zebra mussels and Diporeia is an example of which of the following?

• predation
• mutualism
• competition
• individualism

Which of the following is the best example of an abiotic element in an ecosystem?

• a tree
• a rock
• soil bacteria
• mould on a rotting log