Question 1

What is the smallest unit of matter?

Accepted Answer

atom

Answer

organism

Answer

cell

Answer

molecule

Question 2

Which type of energy is produced by the sun?

Accepted Answer

solar

Answer

nuclear

Answer

thermal

Answer

wind

Question 3

What is the process called by which plants make their own food?

Accepted Answer

photosynthesis

Answer

circulation

Answer

digestion

Answer

respiration

Question 4

What is the measurement of how much matter is in an object?

Accepted Answer

mass

Answer

density

Answer

volume

Answer

weight

Question 5

What is the force that pulls objects towards each other?

Accepted Answer

gravity

Answer

magnetism

Answer

electricity

Answer

friction

Question 6

What is the long-term change in Earth's climate called?

Accepted Answer

global warming

Answer

air pollution

Answer

deforestation

Answer

ozone depletion

Question 7

What is the main function of the circulatory system?

Accepted Answer

transporting blood and nutrients

Answer

controlling movement

Answer

processing food

Answer

fighting infections

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