TerraNova Science 2

Question 1

What is the basic unit of life?

Accepted Answer

Cell

Answer

The cell is the smallest structural and functional unit of all living organisms.

Question 2

Which gas do humans exhale in greater amounts compared to what they inhale?

Accepted Answer

Carbon dioxide

Answer

Humans exhale more carbon dioxide (CO₂) because it is a waste product of cellular respiration.

Question 3

What force pulls objects toward Earth?

Accepted Answer

Gravity

Answer

Gravity is the force of attraction that pulls objects toward Earth's center.

Question 4

Which layer of the atmosphere contains the ozone layer?

Accepted Answer

Stratosphere

Answer

The ozone layer is located in the stratosphere, about 15–35 km above Earth's surface.

Question 5

What is the term for an organism that makes its own food through photosynthesis?

Accepted Answer

Producer

Answer

Producers (autotrophs) make their own food using sunlight and form the base of food chains.

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