OXFORD EDUCATION ACADEMY BATKHELA
Summer Vacation Homework
Biology (Grade 7)
Part A: Multiple Choice Questions
Choose the correct option:
1. The process in which glucose is broken down in the presence of oxygen is called:
a) Digestion b) Circulation c) Aerobic respiration d) Anaerobic respiration
2. Which gas is released as a by-product during aerobic respiration?
a) Nitrogen b) Carbon dioxide c) Oxygen d) Hydrogen
3. The organ that pumps blood throughout the body is the:
a) Brain b) Lungs c) Heart d) Liver
4. What is the function of red blood cells?
a) Clot the blood b) Fight infections c) Carry oxygen d) Digest food
5. Which part of the respiratory system filters and moistens the air?
a) Lungs b) Trachea c) Nostrils d) Nasal cavity
6. The voice box is also known as the:
a) Trachea b) Larynx c) Pharynx d) Epiglottis
7. Which structure prevents food from entering the windpipe?
a) Glottis b) Diaphragm c) Epiglottis d) Bronchi
8. Which blood vessel carries blood away from the heart?
a) Veins b) Capillaries c) Arteries d) Venules
9. What type of blood vessel connects arteries and veins?
a) Arteries b) Veins c) Capillaries d) Arterioles
10. Which component of blood fights against germs and infections?
a) RBCs b) WBCs c) Platelets d) Plasma
11. Which blood component helps in clotting?
a) RBC b) WBC c) Platelets d) Plasma
12. How many chambers are there in the human heart?
a) 2 b) 3 c) 4 d) 5
13. The flap-like structure that closes the windpipe when we swallow is:
a) Trachea b) Epiglottis c) Larynx d) Diaphragm
14. What is the function of capillaries?
a) Pump blood b) Produce sound c) Exchange gases d) Store oxygen
15. In which part of the lungs does exchange of gases occur?
a) Bronchi b) Alveoli c) Trachea d) Pharynx
16. What is the function of the diaphragm in breathing?
a) Filters air b) Produces sound c) Controls lung movement d) Connects arteries and veins
17. During exercise, the body may perform:
a) Only aerobic respiration b) No respiration c) Anaerobic respiration d) Digestion only
18. Which type of respiration does not require oxygen?
a) Aerobic b) Anaerobic c) Cellular d) External
19. Blood rich in oxygen returns to the heart through:
a) Arteries b) Veins c) Capillaries d) Bronchi
20. The thin wall between the left and right sides of the heart is called:
a) Valve b) Septum c) Atrium d) Ventricle
21. Which is not part of the respiratory system?
a) Trachea b) Alveoli c) Kidneys d) Bronchi
22. How is carbon dioxide removed from the body?
a) By lungs b) By liver c) By kidneys d) By skin
23. The smallest blood vessels are called:
a) Arteries b) Veins c) Capillaries d) Lungs
24. Which part of the heart receives blood from the lungs?
a) Right atrium b) Right ventricle c) Left atrium d) Left ventricle
25. Which structure prevents the backflow of blood?
a) Septum b) Arteries c) Valves d) Bronchioles
Part B: Short Answer Questions
1. Define respiration and name its two types.
2. How is breathing different from respiration?
3. Name the components of the human respiratory system.
4. Write the function of red blood cells and white blood cells.
5. What is the role of diaphragm during inhalation?
6. Describe the structure of alveoli.
7. What is the function of valves in the heart?
8. Name the three types of blood vessels and mention one function of each.
Part C: Long Answer Questions
1. Explain the process of aerobic respiration with a chemical equation.
2. Describe the path of oxygen from outside the body to the bloodstream.
3. Explain the structure and function of the human heart.
4. Describe the process of gaseous exchange in the lungs.
5. Write a detailed note on the components of blood.
6. Compare arteries, veins, and capillaries (minimum 4 points).
Part D: Creative Activities (3 Tasks)
1. Model Making:
Make a working model of the human heart using plastic bottles, straws, water, and red food color
(Activity 2.3 from book).
2. Chart Work:
Draw and label a diagram of the human respiratory system and human circulatory system on chart
paper.
3. Story Writing:
Write two short stories:
a) One showing the bad effects of smoking or air pollution on lungs.
b) One showing the benefits of exercise and clean air on the respiratory system.
