Class 7 – Science Question Paper
Time: 3 Hours Max Marks: 80
SECTION A – OBJECTIVE (20 marks)
Q1. MCQs (1 × 10 = 10)
- The fluid part of blood in which cells are suspended is called:
(a) Plasma (b) Platelets (c) Lymph (d) Water - The tiny blood vessels where exchange of materials between blood and tissues takes place are:
(a) Arteries (b) Veins (c) Capillaries (d) Nerves - The basic unit of time in SI is:
(a) Minute (b) Hour (c) Second (d) Day - A pendulum completes 10 oscillations in 20 seconds. Its time period is:
(a) 0.5 s (b) 1 s (c) 2 s (d) 5 s - Heat from the Sun reaches Earth by:
(a) Conduction (b) Convection (c) Radiation (d) Conduction & convection both - Land breeze blows from:
(a) Land to sea at night (b) Sea to land at night
(c) Land to sea during the day (d) Sea to land during the day - The age at which the menstrual cycle stops in women is called:
(a) Adolescence (b) Menstruation (c) Menopause (d) Puberty - Acne and pimples commonly seen in adolescents are caused due to:
(a) Lack of sleep (b) Extra sweating only
(c) Increased oily secretions blocking skin pores (d) Eating spicy food - In plants, water and minerals move upward through:
(a) Xylem (b) Phloem (c) Stomata (d) Root cap - The main excretory product in human beings is:
(a) Uric acid (b) Ammonia (c) Urea (d) Glucose
Q2. Fill in the blanks. (1 × 5 = 5)
- The process of filtration of blood through an artificial kidney is called __________.
- Changes in voice in boys during adolescence are due to the growth of the __________.
- Gills help fish to use __________ dissolved in water.
- The meter in vehicles that measures total distance travelled is called __________.
- The continuous movement of water between land, water bodies and atmosphere is called __________.
Q3. True or False. (1 × 5 = 5)
- A speedometer measures the total distance covered by a vehicle. [ ]
- Insects like cockroach breathe through spiracles and tracheae. [ ]
- Hollow bricks help to keep houses cool in summer and warm in winter. [ ]
- Hormones are produced outside the body and then injected into blood. [ ]
- During transpiration, water vapour is released through stomata. [ ]
SECTION B – SHORT ANSWER
Q4. Answer the following. (3 × 5 = 15)
- Define breathing. Differentiate between inhalation and exhalation.
- Explain briefly the path of blood circulation in the human body starting from the right side of the heart.
- What is meant by speed? Give its formula and SI unit.
- Write any three differences between good and poor conductors of heat with examples.
- What is meant by secondary sexual characteristics? Give two examples each in boys and girls.
Q5. Answer the following. (5 × 3 = 15)
- Explain the structure of the human heart. Name its four chambers and state why there is a partition between them.
- Describe an activity to show convection in liquids using coloured water in a beaker. Mention aim, observation and conclusion.
- What is adolescence? Describe any three emotional or behavioural changes that adolescents may experience and suggest ways to handle them.
SECTION C – LONG ANSWER
Q6. Answer the following. (5 × 3 = 15)
- Describe an activity to measure the breathing rate of a person under different conditions such as rest, brisk walk and running. Give a sample observation table and write the conclusion.
- A bus covers 120 km in 3 hours.
- (a) Calculate its speed in km/h.
- (b) Convert this speed into m/s.
- (c) If the same bus continues with the same speed, how much distance will it cover in 5 hours?
- Explain groundwater formation. Define infiltration and aquifer. Why is groundwater getting depleted and how can it be conserved (mention any two methods)?
Q7. Answer any ONE. (5 × 1 = 5)
- What is meant by personal hygiene? Write in detail about menstrual hygiene and list any five good practices to be followed during menstruation.
OR
- Explain transport of substances in plants. Describe the roles of xylem and phloem and write how transpiration helps in the upward movement of water.
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