Composition of Air and Its Properties Quiz

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What are the main factors that determine the net gas exchange in plants?

The relative rates of photosynthesis and respiration.

What is the net gas exchange in plants during the daytime?

Net uptake of carbon dioxide and net release of oxygen.

What is the net gas exchange in plants at night?

Net uptake of oxygen and net release of carbon dioxide.

What are the main parts of the human breathing system?

Nasal cavity, trachea, bronchus, bronchiole, air sac, diaphragm, intercostal muscle. Signup and view all the answers

Where does gas exchange occur in the human respiratory system?

At the air sacs. Signup and view all the answers

What gases pass from the air sacs into the blood?

Oxygen and carbon dioxide. Signup and view all the answers

What harmful substances are commonly found in cigarette smoke?

Carbon monoxide, sulphur dioxide, nitrogen oxides, and suspended particulates. Signup and view all the answers

What are the potential health effects of exposure to air pollutants?

Headaches, bronchitis, asthma, and even death. Signup and view all the answers

What does AQHI stand for?

Air Quality Health Index. Signup and view all the answers

What does a higher AQHI index indicate?

Poorer air quality. Signup and view all the answers

What are the main components of air and their percentages?

The main components of air are nitrogen (78%), oxygen (21%), carbon dioxide (0.03%), noble gases (0.9%), water vapor, and other gases (0.07%). Signup and view all the answers

What is the effect of carbon dioxide on hydrogencarbonate indicator?

Carbon dioxide turns hydrogencarbonate indicator from red to yellow. Signup and view all the answers

What is the effect of carbon dioxide on a glowing splint?

Carbon dioxide relights a glowing splint. Signup and view all the answers

What is the effect of oxygen on a burning splint?

Oxygen causes a burning splint to burn more brightly. Signup and view all the answers

What is the effect of carbon dioxide on dry cobalt chloride paper?

Both carbon dioxide and water turn dry cobalt chloride paper from blue to pink. Signup and view all the answers

What is the effect of carbon dioxide on limewater?

Carbon dioxide turns limewater from colorless to milky. Signup and view all the answers

What is the chemical equation for photosynthesis?

6CO2 + 6H2O -> C6H12O6 + 6O2 Signup and view all the answers

What is the significance of photosynthesis?

Photosynthesis provides food for living things and maintains the balance of oxygen and carbon dioxide in nature. Signup and view all the answers

What is the word equation for respiration?

glucose + oxygen -> carbon dioxide + water Signup and view all the answers

What are the main differences between photosynthesis and respiration?

Photosynthesis takes place only in plants, while respiration takes place in both plants and animals. In photosynthesis, energy is stored in food, while in respiration, energy is released from food. Signup and view all the answers