20 Questions
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.
Where does gas exchange occur in the human respiratory system?
At the air sacs.
What gases pass from the air sacs into the blood?
Oxygen and carbon dioxide.
What harmful substances are commonly found in cigarette smoke?
Carbon monoxide, sulphur dioxide, nitrogen oxides, and suspended particulates.
What are the potential health effects of exposure to air pollutants?
Headaches, bronchitis, asthma, and even death.
What does AQHI stand for?
Air Quality Health Index.
What does a higher AQHI index indicate?
Poorer air quality.
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%).
What is the effect of carbon dioxide on hydrogencarbonate indicator?
Carbon dioxide turns hydrogencarbonate indicator from red to yellow.
What is the effect of carbon dioxide on a glowing splint?
Carbon dioxide relights a glowing splint.
What is the effect of oxygen on a burning splint?
Oxygen causes a burning splint to burn more brightly.
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.
What is the effect of carbon dioxide on limewater?
Carbon dioxide turns limewater from colorless to milky.
What is the chemical equation for photosynthesis?
6CO2 + 6H2O -> C6H12O6 + 6O2
What is the significance of photosynthesis?
Photosynthesis provides food for living things and maintains the balance of oxygen and carbon dioxide in nature.
What is the word equation for respiration?
glucose + oxygen -> carbon dioxide + water
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.
Test your knowledge on the composition of air and its properties in this quiz on the Living Things and Air Unit. Explore topics such as the percentages of nitrogen, oxygen, carbon dioxide, and other gases in the atmosphere, as well as the various tests for oxygen and carbon dioxide.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
