Science Review Grade 5

Front

What is the function of the lungs in the human body?

Back

The lungs are responsible for gas exchange, allowing oxygen to enter the bloodstream and carbon dioxide to be expelled.

Front

What protects the lungs in the human body?

Back

The rib cage protects the lungs by providing a bony structure that shields them from injury.

Front

What are alveoli and why are they important?

Back

Alveoli are tiny air sacs in the lungs that increase the surface area for gas exchange, allowing more oxygen to enter the blood.

Front

What gas do we breathe in more of compared to what we breathe out?

Back

We breathe in more oxygen than we breathe out.

Front

What do plants add to the atmosphere that helps make the air fresh?

Back

Plants add oxygen to the atmosphere through the process of photosynthesis.

Front

Why do fish stay at the surface of the water on a hot day?

Back

Fish stay at the surface because there is more oxygen available there than at the lower levels of the water.

Front

Which organ is NOT part of the human respiratory system?

Back

The skin is not part of the human respiratory system.

Front

What is respiration?

Back

Respiration is the process of taking in oxygen and expelling carbon dioxide, which is essential for energy production in cells.

Front

What is the role of the trachea in the respiratory system?

Back

The trachea, or windpipe, is a tube that connects the throat to the lungs, allowing air to pass through.

Front

What is the difference between inhalation and exhalation?

Back

Inhalation is the process of taking air into the lungs, while exhalation is the process of releasing air from the lungs.