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Science 7 Final Review . Part A Unit 1 Interactions & Ecosystems. Unit 1: Interactions & Ecosystems. What are the 4 needs of living things?. Food, water, suitable habitat, gas exchange. What are adaptations? Example?.

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science 7 final review

Science 7 Final Review

Part A

Unit 1 Interactions & Ecosystems

unit 1 interactions ecosystems
Unit 1: Interactions & Ecosystems
  • What are the 4 needs of living things?
slide5

Inherited characteristics that help an organism survive and reproduce in their environment.

  • Example: long bill, robin’s feet, tiger’s stripes
slide7

Mutualism ex. Shark &

  • Commensalism ex. Orchid & tree trunk
  • Parasitism ex. Tapeworm & human
human impacts on ecosystems
Human impacts on Ecosystems
  • What are natural resources?
slide11

Need- must have it to survive

  • Want- a luxury you could live without
environmental choices
Environmental choices
  • What is an ecological footprint?
slide15

Reduce

  • Reuse
  • Recycle
interactions of organisms
Interactions of Organisms
  • What is the difference between Abiotic and Biotic?
slide17

Abiotic- non-living

  • Biotic- living
slide19

A food web is more complex than a food chain

  • A food chain starts with a producer
slide21

Producers- produce food energy for themselves

  • Consumers- eat food made by consumers
  • Decomposers- break down dead or waste material
slide23

All are consumers

  • Herbivores only eat plants
  • Omnivores eat plants and animals
  • Carnivores only eat animals
slide25

Shows the biomass or number of organisms at each level of the food chain. Producers form the base.

slide29

Scavengers eat dead or decaying plants or animals

  • Decomposers live inside dead or decaying plants or animals
slide35

The different types of harmful materials that are released into the environment through human activities

slide37

The movement of pollutants through levels of a food chain so that greater quantities are retained with movement up the food chain

changes in the ecosystem
Changes in the Ecosystem
  • How does primary succession differ from secondary?
slide39

Primary is from bare rock

  • Secondary from where there was organisms before
monitoring
Monitoring
  • What are the 4 types of ecosystem monitoring?
slide45

Physical

  • Environmental
  • Chemical
  • Biological
slide55

Manipulated- variable you change

  • Responding- what happens as a result of the experiment
  • Controlled- keep the same throughout the experiment