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Lesson Worksheet: Natural Environmental Changes Science

In this worksheet, we will practice identifying natural environmental changes and energy changes in an ecosystem.

Q1:

True or False: In the desert ecosystem, if there are heavy rains for a long period of time, this could increase the damage done to the ecosystem by floods.

  • ATrue
  • BFalse

Q2:

is one of the ways that help to conserve the marine environment surrounding the Palau Islands.

  • ASevere climate change
  • BDumping plastic in the sea
  • CHabitat loss
  • DAvoiding overfishing

Q3:

True or False: Although energy is transferred between organisms in the food web, some of the energy is recycled by decomposers back into the ecosystem.

  • ATrue
  • BFalse

Q4:

As plants are the main source of food in the ecosystem, what would happen to rats and snakes if all the plants were removed from the ecosystem?

  • ARats and snakes would increase in number.
  • BRats would decrease in number, but snakes would increase in number.
  • CRats would increase in number, but snakes would decrease in number.
  • DRats and snakes would decrease in number.

Q5:

What would most likely happen to the food web if drought occurs in the ecosystem for a long period of time?

  • APlants might be affected negatively, but other organisms in the food web would not be affected.
  • BPlants might be affected negatively and, in turn, other organisms in the food web are affected.
  • CPlants and animals would be harmed, but the food web might not be affected.
  • DPlants and animals would stay healthy and the food web might not be affected.

Q6:

Look at the diagram.

Construct a food chain that starts with the grass and ends with the hawk.

  • AGrass rabbit fox hawk
  • BGrass rabbit hawk
  • CGrass snake hawk
  • DGrass snake fox hawk

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