Page 28 - Science Tour 3 (Workbook)

1. The atmosphere
a. 21% of the atmosphere.
2. Nitrogen represents
b. is a mixture of gases.
3. Oxygen represents
c. during photosynthesis.
4. Living things use nitrogen
d. 78% of the atmosphere.
e. to make protein.
5. Plants use carbon dioxide
6. Carbon dioxide helps keep
f. Earth’s temperature suitable.
My Respiratory
7 System

Match:
Match:

A B

1. The nose a. passes air to the larynx.

2. The pharynx b. is a muscle under the lungs.

3.The larynx c. are filled with air while breathing.

4. The trachea d. filters dirt and dust from inhaled air.

5. The lungs e. is the voice box.

6. The diaphragm f. passes air to the two lungs.

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