5th Grade Unit 4 Pre-Test

What is true of invasive species? Select all that apply.

• They are typically harmful to a new environment

• They can limit resources available to other plants

• They are often eaten by native animal species

• They typically spread very slowly

• They are native to an area

Which of the following is not a way that trees affect their ecosystems?

• Reducing the number of insects by eating them

• Moving soil as root growth occurs

• Releasing oxygen into the atmosphere

• Absorbing water from the soil

A living thing that gets energy by breaking down dead organisms and animal wastes into simpler substances is a ___________________.

• Decomposer

• Scavenger

• Energy Pyramid

• Invasive Species

A diagram that shows that energy is lost at each level in a food chain is a(n) ____________________.

• Energy Pyramid

• Food Chain

• Food Web

• Invasive Species

The transfer of food energy between organisms in an ecosystem is a ___________________.

• Food Chain

• Food Web

• Energy Pyramid

• Invasive Species

A group of food chains that over lap is a ___________________.

• Food Web

• Energy Pyramid

• Food Chain

• Decomposer

An organism that is nonnative to an environment that disrupts the stable web of life is a(n) _______________________.

• Invasive Species

• Energy Pyramid

• Scavenger

• Decomposer

An animal that feeds on dead plants and animals is a _____________________.

• Scavenger

• Decomposer

• Invasive Species

• Energy Pyramid

Which organism would be at the top of the food chain?

• Wolf

• Mouse

• Wildflowers

• Arctic Fox

Which organism would be at the bottom of the food chain?

• Wolf

• Grass

• Arctic Hare

• Mouse