Class 7 – Science Question Paper
Time: 3 Hours
Max Marks: 80
SECTION A – OBJECTIVE (20 marks)
Q1. Multiple Choice Questions (1 × 10 = 10)
Tick (✓) the correct option.
- The process in which glucose is broken down using oxygen to release energy is called:
(a) Breathing (b) Exhalation (c) Aerobic respiration (d) Anaerobic respiration - The pigment that gives red colour to blood is:
(a) Chlorophyll (b) Haemoglobin (c) Keratin (d) Melanin - Which blood vessel has thick, elastic walls because blood flows in it under high pressure?
(a) Vein (b) Artery (c) Capillary (d) Lymph vessel - The basic unit of speed in SI system is:
(a) m/s (b) km/h (c) cm/s (d) m/min - The time taken by a pendulum bob to complete one complete to–fro motion is called:
(a) Swing (b) Period (c) Frequency (d) Oscillation - In which of the following processes does heat transfer take place without any medium?
(a) Conduction (b) Convection (c) Radiation (d) All of these - The movement of cooler air from sea towards land during the day is called:
(a) Land breeze (b) Sea breeze (c) Storm (d) Monsoon - The age range of adolescence usually lies between:
(a) 0–5 years (b) 5–10 years (c) 10–19 years (d) 19–30 years - Features like growth of beard in boys and development of breasts in girls are called:
(a) Primary organs (b) Secondary sexual characteristics (c) Excretory traits (d) Emotional traits - The vascular tissue that transports food in plants is:
(a) Xylem (b) Phloem (c) Cork (d) Epidermis
Q2. Fill in the blanks. (1 × 5 = 5)
- The process of removal of waste products from the body is called __________.
- The instrument used by doctors to listen to heartbeat is called __________.
- The distance–time graph of a body moving with constant speed is a __________ line.
- Materials like wool and air are __________ conductors of heat.
- Chemicals produced in our body that control changes during adolescence are called __________.
Q3. State whether the following statements are True or False. (1 × 5 = 5)
- Arteries carry blood towards the heart. [ ]
- During inhalation, the diaphragm moves downwards. [ ]
- Land heats and cools faster than water. [ ]
- Menstruation generally starts at the age of 2–3 years. [ ]
- In convection, heat is transferred by the actual movement of particles. [ ]
SECTION B – SHORT ANSWER (Approx. 40–50 words)
Q4. Answer the following questions. (3 × 5 = 15)
- Differentiate between aerobic and anaerobic respiration (any 3 points).
- Write any three functions of blood.
- Define pulse and pulse rate. How is pulse related to heart beat?
- What is uniform motion and non-uniform motion? Give one example of each.
- What is transpiration? Write any two advantages of transpiration for plants.
Q5. Answer the following questions. (5 × 3 = 15)
- Explain the structure and function of the human excretory system with a neat, labelled diagram.
- What is puberty? Describe any four physical changes that occur in boys and girls during adolescence.
- Explain the water cycle with the help of a labelled diagram. Name the processes involved.
SECTION C – LONG ANSWER (Approx. 70–80 words)
Q6. Answer the following. (5 × 3 = 15)
- (a) What is a simple pendulum?
(b) Define time period.
(c) In an experiment, a pendulum takes 40 seconds to complete 20 oscillations. Find its time period.
(d) What kind of motion does a simple pendulum show? - Describe an activity to show that metals are good conductors of heat using pins and wax on a metal strip. Write the observation and conclusion.
- Explain how heat is transferred when water is heated in a pan on a gas stove. Name and briefly explain all three modes of heat transfer involved.
Q7. Answer any ONE of the following. (5 × 1 = 5)
- What is cyberbullying? Suggest any five rules (Do’s and Don’ts) for responsible social media use for adolescents.
OR
- What are addictive substances? Name any three such substances and write any four harmful effects of substance abuse on health and life.
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