Respiration and Air Properties
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
The Breathing Mechanism
SubtopicThe Breathing Mechanism under Respiration and Air Properties for Grade 5 CBSE.
Preview questions (no answers)
- 1.
Where does the exchange of gases ( and ) actually take place?
A.In the nose
B.In the windpipe
C.In the alveoli of lungs
D.In the mouth
- 2.
If you are sitting quietly reading a book, your breathing will be:
A.Very fast
B.Normal and steady
C.Stopped
D.Gasped
- 3.
Which of these is not a part of the human respiratory system?
A.Lungs
B.Windpipe
C.Nose
D.Kidneys
- 4.
The process of respiration helps the body to produce:
A.Blood
B.Energy
C.Bones
D.Water
- 5.
Which gas is primarily responsible for the 'greenhouse effect' and is released when we exhale?
A.Oxygen
B.Nitrogen
C.Carbon dioxide
D.Helium
- 6.
Why do doctors use a stethoscope to listen to our chest?
A.To check the color of the lungs
B.To measure the amount of oxygen in the blood
C.To hear the sounds of breathing and the heartbeat
D.To see the movement of the diaphragm
- 7.
What happens to the speed of the wind when the air pressure in an area drops suddenly?
A.The wind stops completely
B.The wind speed increases
C.The wind speed decreases
D.The wind changes direction to the north
- 8.
In the mechanism of breathing, how do the lungs themselves change size?
A.They have muscles that expand and contract on their own
B.They change size passively as the chest cavity volume changes
C.They are filled with a pump located in the throat
D.They only expand when the heart pushes them
- 9.
Which of these statements about cellular respiration is false?
A.It takes place in every living cell
B.It is the same thing as inhaling and exhaling
C.It releases energy from food
D.It produces carbon dioxide as a waste product
- 10.
What role does the moisture on the surface of alveoli play?
A.It helps gases to dissolve and pass through the membranes
B.It prevents the lungs from getting too hot
C.It acts as a glue to keep the lungs attached to the ribs
D.It stores excess oxygen for later use
Download the worksheet for Respiration and Air Properties - The Breathing Mechanism to practice offline. It includes additional chapter-level practice questions.
Hot and Cold Air Properties
SubtopicHot and Cold Air Properties under Respiration and Air Properties for Grade 5 CBSE.
Preview questions (no answers)
- 1.
Which part of our body expands when we take a deep breath?
A.Feet
B.Hands
C.Chest
D.Ears
- 2.
When we do yoga or deep breathing, we feel:
A.Tired
B.Relaxed
C.Angry
D.Hungry
- 3.
Which of these is NOT a breathing organ in humans?
A.Nose
B.Lungs
C.Windpipe
D.Stomach
- 4.
What happens to the temperature of air as it moves over a flame?
A.It becomes colder
B.It stays the same
C.It becomes hotter
D.It turns into ice
- 5.
When you hold your breath, what is the main reason you eventually feel a strong urge to breathe again?
A.Your body is running out of nitrogen
B.Carbon dioxide is building up in your blood
C.Your lungs are getting too small
D.Your heart stops beating
- 6.
The windpipe is also known by which scientific name?
A.Esophagus
B.Trachea
C.Aorta
D.Pharynx
- 7.
Why is the air inside a hot air balloon heated by a burner?
A.To make the air inside the balloon heavier
B.To make the air inside expand and become lighter than the surrounding air
C.To change the color of the balloon
D.To provide light for the passengers
- 8.
Why does a person gasp for air after being underwater for a long time?
A.The body is trying to rapidly get rid of the carbon dioxide that built up while they weren't breathing.
B.The water has entered the lungs and needs to be replaced by nitrogen.
C.The lungs have become too cold and need hot air to function.
D.The pressure of the water has made the lungs permanently smaller.
- 9.
What property of air is most important for the working of a common dropper or a syringe?
A.Air pressure and the fact that air occupies space.
B.The temperature of the air inside the dropper.
C.The amount of oxygen in the dropper.
D.The color of the air.
- 10.
Which of the following describes the correct state of the ribcage and diaphragm during exhalation?
A.Ribs move down and in; diaphragm moves up.
B.Ribs move up and out; diaphragm moves down.
C.Ribs move down and in; diaphragm moves down.
D.Ribs move up and out; diaphragm moves up.
Download the worksheet for Respiration and Air Properties - Hot and Cold Air Properties to practice offline. It includes additional chapter-level practice questions.
Condensation and Evaporation in Air
SubtopicCondensation and Evaporation in Air under Respiration and Air Properties for Grade 5 CBSE.
Preview questions (no answers)
- 1.
What is the blanket of air surrounding the Earth called?
A.Hydrosphere
B.Atmosphere
C.Lithosphere
D.Biosphere
- 2.
When we sneeze, it is usually because our respiratory system is trying to:
A.Get more oxygen
B.Remove dust or irritating particles
C.Make us feel tired
D.Cool down the brain
- 3.
The salt we use in our food is often obtained from seawater through which process?
A.Condensation
B.Evaporation
C.Respiration
D.Filtration
- 4.
Respiration is the process by which living things ______.
A.Make their own food
B.Get energy from food using oxygen
C.Sleep for long hours
D.Change their color
- 5.
Which component of air is used up during both respiration and the burning of fuels?
A.Carbon dioxide
B.Nitrogen
C.Oxygen
D.Argon
- 6.
A beam of light entering a dark room through a small hole reveals tiny moving particles. These are:
A.Oxygen atoms
B.Water vapor molecules
C.Dust particles
D.Small insects
- 7.
What happens to our pulse rate when we are sleeping?
A.It becomes very high
B.It stays the same as when we are running
C.It decreases and becomes steady
D.It stops for short intervals
- 8.
What happens to the volume of your chest cavity when you inhale air?
A.It increases as the ribs move out and the diaphragm moves down.
B.It decreases as the ribs move in and the diaphragm moves up.
C.It stays the same, but the air pressure inside increases.
D.It increases because the lungs produce more Carbon Dioxide.
- 9.
Which gas, making up about of the atmosphere, is essential for plants but is a waste product of human respiration?
A.Carbon Dioxide
B.Oxygen
C.Argon
D.Helium
- 10.
If you place a layer of oil on top of a beaker of water, what will happen to the rate of evaporation?
A.Evaporation will stop or decrease significantly because the oil blocks the water molecules from escaping.
B.Evaporation will increase because the oil attracts the heat from the sun.
C.The water will evaporate through the oil because oil is a liquid.
D.The oil will evaporate first, followed by the water.
Download the worksheet for Respiration and Air Properties - Condensation and Evaporation in Air to practice offline. It includes additional chapter-level practice questions.