ICAS Science 4

Question 1

Which of the following best describes a food web?

Accepted Answer

A network of interconnected food chains in an ecosystem

Answer

A single chain showing what one animal eats

Answer

A diagram of how energy is lost as heat

Answer

A list of all producers in a habitat

Question 2

Water changes from a liquid to a solid when it is cooled to 0°C (32°F). This process is called:

Accepted Answer

Freezing

Answer

Melting

Answer

Condensation

Answer

Evaporation

Question 3

A student sets up an experiment with two identical plants. One receives water daily, the other does not. What is the independent variable?

Accepted Answer

Whether or not the plant receives water

Answer

The growth of the plants

Answer

The type of soil used

Answer

The amount of sunlight each plant receives

Question 4

Which of the following is a renewable source of energy?

Accepted Answer

Solar power

Answer

Coal

Answer

Natural gas

Answer

Petroleum

Question 5

A ball is rolled along a smooth floor and eventually stops. The force that caused it to stop is:

Accepted Answer

Friction

Answer

Gravity

Answer

Magnetism

Answer

Air pressure

Question 6

Which organelle is known as the 'powerhouse of the cell' because it produces energy?

Accepted Answer

Mitochondria

Answer

Nucleus

Answer

Ribosome

Answer

Vacuole

Question 7

Which of the following best describes a hypothesis?

Accepted Answer

A testable prediction about the outcome of an experiment

Answer

A proven fact based on many experiments

Answer

A summary of data collected during a study

Answer

A conclusion drawn after analyzing results