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8th grade Bio placement Assessment 2021

Last updated about 5 years ago

5 questions

1

1

1

1

1

Question 5

5.

Question 1

1.

Which of the following statements describes the energy changes
involved in an ecosystem?

The largest animals usually provide the energy for smaller
animals and for plants in a given ecosystem.

The sun's energy is made available to an ecosystem by the
plants in the ecosystem.

The energy for living plants and animals in an ecosystem comes
mainly from dead animals, which are broken down by
decomposers.

In an ecosystem, the smaller organisms require more energy
than the larger organisms.

Question 2

2.

When a predator species is eliminated from the ecosystem, which
of the following is likely to happen?

The number of prey will decrease and the amount of
vegetation will increase.

The number of prey will increase and the amount of
vegetation will decrease.

The number of prey will decrease and the amount of
vegetation will decrease

The number of prey will stay almost the same and the
amount of vegetation will increase.

Question 3

3.

An automobile moves because of the transformation of one energy
form to another form. Which of the sequences below illustrates this
transformation?

An automobile moves because of the transformation of one energy
form to another form. Which of the sequences below illustrates this
transformation?

chemical-heat-mechanical

mechanical-heat-chemical

chemical-mechanical-heat

heat-mechanical-chemical

Question 4

4.

The component of an experiment which is not altered but is used
as a comparison is the ....

dependent variable

control

independent variable

controlling factor