A weather instrument used to measure rainfall.

Blood gives our body nutrients and _________.

What are the three layers of the Earth ?

It is the second closest layer of the atmosphere to the Earth. It protects us from most of the objects that fall from space, such as meteorites.

The ___________ protects us from most of the objects that fall from space, such as meteorites.

What does the circulatory system do?

A weather instrument used to measure temperature.

__________ makes up 78% of the air.

Where can we find our knuckles?

It is the closest layer of the atmosphere to the Earth. Weather occurs in this layer.

What does torso mean ?

Which organs make up the respiratory system ?

This gas forms only 0.04% of the air. It is formed when people or animals breathe out.