Class VII – Science
Chapters: Light & Forests: Our Lifeline
Time: 1 Hour
Maximum Marks: 20
This question paper is divided into three sections – A, B and C.
All questions are compulsory.
Draw neat and labelled diagrams wherever required.
Section A (1 × 5 = 5 Marks)
Question Numbers 1 to 3 are Multiple Choice Questions.
Question Numbers 4 and 5 are Assertion–Reason questions.
Each question carries 1 mark.
Q1.While standing 3 m in front of a plane mirror, Aarav observes his image. If he moves 1 m towards the mirror, what will be the new distance between Aarav and his image?
a) 2 m
b) 3 m
c) 4 m
d) 6 m
Q2.Which of the following will NOT form a real image?
a) Concave mirror (object beyond focus)
b) Convex mirror
c) Convex lens
d) Concave mirror (object beyond centre of curvature)
Q3.In a forest ecosystem, which of the following acts as a decomposer?
a) Tiger
b) Mushroom
c) Deer
d) Grass
Q4. Assertion (A):Forests help in maintaining the water cycle.
Reason (R):
Trees release water vapour into the atmosphere through transpiration.
Options:
a) Both A and R are true and R is the correct explanation of A.
b) Both A and R are true but R is not the correct explanation of A.
c) A is true but R is false.
d) A is false but R is true.
Q5. Assertion (A):A concave mirror can form both real and virtual images.
Reason (R):
The type of image formed by a concave mirror depends on the position of the object.
Options:
a) Both A and R are true and R is the correct explanation of A.
b) Both A and R are true but R is not the correct explanation of A.
c) A is true but R is false.
d) A is false but R is true.
Section B (2 × 4 = 8 Marks)
Q6. Differentiate between a plane mirror and a convex mirror on the basis of:
(a) Nature of image formed
(b) Field of view
Q7. Explain any two ways in which forests prevent soil erosion and floods.
Q8. Draw a ray diagram to show the reflection of light from a plane mirror. Label the incident ray, reflected ray, normal and angle of incidence.
Q9. Case Study (4 marks)
During a school trip to a hill station, students noticed convex mirrors placed at sharp turns on the road. They also observed dense forests on the hills. The teacher explained that forests protect the land and mirrors help drivers see vehicles coming from the opposite direction.
Answer the following questions:
(a) Why are convex mirrors used at sharp turns? (1)
(b) What type of image is formed by a convex mirror? (1)
(c) How do forests help in preventing landslides in hilly areas? (1)
(d) Name one forest product other than timber and explain its use. (1)
Section C (5 × 1 = 5 Marks)
Q10. Long Answer Type Question (5 marks)
Describe the different layers of a forest and explain how plants, animals and microorganisms are interdependent in a forest ecosystem. Also mention any two measures to conserve forests.
Class VII – Science (Competency-Based Assessment)
Chapters:
Reproduction in Plants
Transportation in Plants and Animals
Time: 1 Hour Maximum Marks: 20
Section A
(Question No. 1 to 3 are Multiple Choice Questions. Question No. 4 and 5 are Assertion–Reason type. Each question carries 1 mark.)
Q1. A farmer uses stem cuttings of rose plants instead of seeds to grow new plants. This method is preferred because it:
a) Produces plants in a shorter time b) Increases genetic variation
c) Requires fertilization d) Depends on pollination
Q2. If the phloem tissue of a plant is damaged, which process will be affected the most?
a) Transport of water b) Transport of food
c) Absorption of minerals d) Exchange of gases
Q3. Which blood vessel helps in the exchange of gases and nutrients between blood and body tissues?
a) Artery b) Vein c) Capillary d) Aorta
Q4. Assertion (A): Fertilization leads to the formation of seeds in flowering plants.
Reason (R): Fertilization involves fusion of male and female gametes.
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
Q5. Assertion (A): Veins contain valves.
Reason (R): Valves prevent the backward flow of blood.
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
Section B
(Question No. 6 to 8 are Short Answer Type Questions. Each question carries 2 marks. Question No. 9 is a case-based question carrying 4 marks.)
Q6. A gardener observes that a new plant grows from the underground stem of ginger.
Identify the type of reproduction and mention one advantage of this method. (2 marks)
Q7. A potted plant wilts when not watered for several days.
Name the tissue responsible for water transport and explain why wilting occurs. (2 marks)
Q8. During heavy exercise, the heartbeat of a person increases.
Explain why an increased heartbeat is necessary. (2 marks)
Q9. Case-Based Study (4 marks)
Ravi conducted an experiment where he placed a flowering plant near a window. After a few days, he observed fruit formation. He also learned that blood carries oxygen and nutrients to all parts of the body.
Answer the following questions:
a) Name the process that leads to fruit formation in plants. (1 mark)
b) Which agent most likely helped in pollination near the window? (1 mark)
c) Name the component of blood that carries oxygen. (1 mark)
d) Which blood vessel carries oxygenated blood from the heart to the body? (1 mark)
Section C
(Question No. 10 is a Long Answer Type Question. It carries 5 marks.)
Q10.a) Explain the process of reproduction in flowering plants from pollination to seed formation.
OR
b) Describe the structure and functions of the human heart, explaining how it helps in transportation of substa
nces. (5 marks)
RT 2 VII
Class VII – Science
Section A (1 × 5 = 5 marks)
Question Nos. 1 to 3 are Multiple Choice Questions. Question Nos. 4 and 5 are Assertion–Reason type. Each question carries 1 mark.
Q1. A car covers 120 m in 6 s. What is its speed?
(a) 10 m/s
(b) 15 m/s
(c) 20 m/s
(d) 25 m/s
Q2. Which of the following will show non-uniform motion?
(a) A train moving at constant speed on a straight track
(b) A car slowing down at a traffic signal
(c) A fan rotating at constant speed
(d) The second hand of a clock
Q3. In a simple electric circuit, which combination is correct for the bulb to glow?
(a) Cell + bulb only
(b) Cell + bulb + switch (open)
(c) Cell + bulb + switch (closed)
(d) Bulb + switch only
Q4. Assertion (A): The speed of an object is said to be uniform if it covers equal distances in equal intervals of time.
Reason (R): Uniform speed means the object is always at rest.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Q5. Assertion (A): An electric bulb does not glow when the switch is OFF.
Reason (R): When the switch is OFF, the circuit is incomplete and current cannot flow.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Section B (2 × 6 = 6 marks)
Question Nos. 6 to 8 are short answer type questions. Each question carries 2 marks.
Q6. Calculate the speed of a cyclist who covers a distance of 600 m in 2 minutes.
Q7. Explain why a switch is necessary in an electric circuit. Write one advantage of using a switch.
Q8. State any two differences between uniform motion and non-uniform motion with examples.
Q9. Case-Based Study (4 marks)
A student conducted an experiment to study motion using a trolley. The trolley travelled 10 m in the first 5 s, 10 m in the next 5 s, and 10 m in the next 5 s. The student then made an electric circuit using a cell, connecting wires, a switch, and a bulb.
(a) Identify the type of motion of the trolley. Give reason. (2 marks)
(b) Write the SI unit of speed. (1 mark)
(c) What will happen to the bulb if one connecting wire is removed? (1 mark)
Section C (1 × 5 = 5 marks)
Question No. 10 is a long answer type question. It carries 5 marks.
Q10.
(a) A bus travels 180 km in 3 hours. Calculate its speed. If the bus travels the same distance in 4 hours on the return journey, compare the speeds and state which motion is faster. (3 marks)
(b) Explain any two safety precautions that should be followed while working with electric circuits at home or in school laboratories.(2 marks)
CLASS 7 MOCK TEST CHAPTER 7 TO 13 MM 40
Instructions to candidates
(i) This question paper comprises 17 questions. All questions are compulsory.
(ii) This question paper is divided into five sections – Section A, B, C, D and E.
(iii) SECTION A – Questions No. 1 to 6 are Multiple Choice Questions. Each question carries 1 mark.
(iv) SECTION B – Questions No. 7 to 10 are Very Short Answer type questions. Each question carries 2 marks. Answers should be in the range of 30 to 50 words.
(v) SECTION C – Questions No. 11 to 14 are Short Answer type questions. Each question carries 3 marks. Answers should be in the range of 50 to 80 words.
(vi) SECTION D – Questions No. 15 and 16 are Long Answer type questions. Each question carries 5 marks. Answers should be in the range of 80 to 120 words.
(vii) SECTION E – Question No. 17 is a source‑based / case‑based unit of assessment carrying 4 marks with sub‑parts.
(viii) There is no overall choice. However, an internal choice has been provided in some questions. Only one of the alternatives has to be attempted where choice is given.
SECTION A
Multiple Choice Questions 1 Mark Each
A car moves with uniform acceleration. Which of the following correctly describes its velocity–time graph?
(a) horizontal line
(b) straight line with positive slope
(c) straight line with negative slope
(d) curve never crossing the time axisWhich structure is directly involved in asexual reproduction in Bryophyllum?
(a) seeds
(b) tubers
(c) leaf buds
(d) flowersIn human blood, which component primarily carries oxygen from lungs to tissues?
(a) plasma
(b) red blood cells
(c) white blood cells
(d) plateletsThe resistance of a conductor depends on which factors?
(a) temperature only
(b) length, area of cross‑section, material and temperature
(c) color and length
(d) mass onlyWhen light passes from air into a glass slab, which change occurs?
(a) speed increases, wavelength increases
(b) speed decreases, wavelength decreases
(c) speed increases, wavelength decreases
(d) speed decreases, wavelength increasesWhich of the following best reflects a benefit of forests relevant to local communities?
(a) only timber production
(b) biodiversity, soil protection, and livelihood support
(c) only recreational tourism
(d) only industrial fuel source
SECTION B
Very Short Answer type 2 marks each
Answer briefly in 30–50 words.
Explain why time taken to cover equal distances with uniform speed is the same, but with non‑uniform speed it may differ.
OR
State one advantage of vegetative reproduction over sexual reproduction in plants, with a brief reason.Describe one human bodily adaptation related to transportation of substances (blood or nutrients) that helps maintain health.
OR
Mention one everyday safety device that uses a fuse or circuit breaker and explain, in short, its basic purpose.Give one example of a real‑life situation involving reflection of light, and briefly comment on how understanding reflection is useful in that context.
OR
State one basic step that households can take to reduce water pollution at the source.: Name one forest product other than wood that supports local livelihoods, and give one reason why sustainable use is important.
OR
Define what is meant by wastewater and mention one challenge in managing it.
SECTION C
Short Answer type 3 marks each
Answer in 50–80 words.
A student observes that a ball thrown vertically up returns to the same point after some time. Using concepts of displacement, velocity and acceleration, explain briefly what happens during the journey of the ball.
Discuss how pollination or seed dispersal in plants can affect transportation of nutrients and growth in different habitats. Use a short example to show practical relevance.
Many devices use electric circuits with switches. Explain how a switch controls the circuit, and relate this to safe use of electrical appliances at home.
Explain how forests and proper wastewater management together can contribute to better local water quality and climate regulation. Give one short example or consequence.
SECTION D
Long Answer type 5 marks each
Answer in 80–120 words.
A cyclist speeds up while going downhill and slows down uphill. Explain, using the concept of acceleration and forces, why this happens. Also mention one safety measure a cyclist should follow on such terrain.
A gardener wants to create more plants quickly using a method that keeps the exact traits of the parent plant. Describe one suitable method, explain the basic steps, and note one environmental or practical benefit of using this method in a home or small‑scale garden.
SECTION E
Q16 : Source‑based / Case‑based question 4 marks
Passage:
Plants, animals, and humans interact constantly with their environment. Forests act as green lungs by supporting biodiversity, regulating water cycles, and moderating climate. Light is essential for plants to produce food through photosynthesis. When wastewater from homes or factories is not treated properly, it can harm plants, animals, and human health. These interlinked systems highlight why understanding motion, energy, life processes, and responsible use of resources is vital for sustainable living.
Q17 (a) Identify two real‑life skills a student can develop by learning about forests and wastewater together, according to the passage.
(b) Explain briefly why photosynthesis in plants connects forests, light, and the broader environment.
(c) Suggest one small project or awareness activity that students could undertake to promote cleaner local water or forest conservation, and mention one expected outcome of such activity.
ANSWER KEY
SECTION A
Multiple Choice Questions 1 mark each
(b) straight line with positive slope
Uniform acceleration → velocity increases linearly with time, so v–t graph is a straight line with positive slope.
(c) leaf buds
Bryophyllum produces plantlets from leaf buds for asexual reproduction.
(b) red blood cells
Red blood cells carry oxygen from lungs to tissues.
(b) length, area of cross‑section, material and temperature
Resistance depends on physical dimensions, material resistivity, and temperature.
(b) speed decreases, wavelength decreases
Entering a denser medium reduces speed; frequency stays same, so wavelength decreases.
(b) biodiversity, soil protection, and livelihood support
Broad, community‑relevant benefits beyond only timber or tourism.
SECTION B
Very Short Answer type 2 marks each
Answer briefly, ~30–50 words.
7. Sample answers
Option 1 – uniform vs non‑uniform speed
With uniform speed, the object covers equal distances in equal times, so time for each equal distance is same.
With non‑uniform speed, speed varies, so some segments take more or less time even if distances are equal.
Option 2 – advantage of vegetative reproduction
Vegetative reproduction produces new plants identical to the parent quickly and without seeds; useful when conditions suit the parent and for rapid spread. It avoids dependence on pollination or seed germination, saving time and ensuring uniform traits.
8. Sample answers
Option 1 – human adaptation for transport
A large surface area of red blood cells and their hemoglobin content helps efficient oxygen transport. This supports metabolism and keeps tissues healthy by delivering oxygen and removing carbon dioxide.
Option 2 – safety device and purpose
A fuse or circuit breaker in home wiring prevents overload or short circuits by cutting off current when it becomes too high. This protects appliances and reduces fire risk by stopping excessive current flow.
9. Using a bathroom mirror: reflection helps one see oneself clearly. Understanding reflection lets people position mirrors for best visibility and avoid glare or blind spots in daily grooming or dressing.
Households can avoid throwing oil, chemicals, or non‑biodegradable waste into drains. This keeps wastewater cleaner, reduces load on treatment, and protects local water bodies from contamination.
10. Option 1 – forest product and sustainable use
Example: fruits, nuts, medicinal plants, or bamboo.
Sustainable use ensures ongoing supply, protects biodiversity, and maintains livelihoods without degrading forests for future generations.
Option 2 – definition and challenge
Wastewater is used water from homes, industries, or farms that contains pollutants.
A challenge is removing or treating contaminants effectively before releasing water back to the environment to avoid harm to health and ecosystems.
SECTION C
Short Answer type 3 marks each
Answer in ~50–80 words.
11. Ball thrown vertically upward
As the ball rises, its displacement increases upward; velocity decreases due to downward acceleration from gravity. At the highest point, velocity becomes zero. Then it falls back, displacement decreases as it returns; velocity increases downward while acceleration remains constant downward. The ball returns to its starting point because upward and downward motions are symmetric under constant gravity, ignoring air resistance.
12. Pollination or seed dispersal and habitat relevance
Pollination or seed dispersal enables plants to reproduce and spread to new areas. This affects where nutrients are cycled and where plants grow, supporting ecosystems. For example, wind or animal dispersal can carry seeds to nutrient‑rich soil patches, allowing growth in diverse habitats and influencing food availability for animals and humans.
13. Switch control and safe appliance use
A switch opens or closes an electric circuit. When closed, it allows current to flow and the device operates; when open, it stops current and turns the device off. This prevents unwanted current flow, saves energy, and helps avoid hazards like short circuits or shocks when appliances are not in use or being maintained.
14. Forests + wastewater management for water quality and climate
Forests reduce soil erosion, filter water, and support local rainfall and temperature balance. Proper wastewater handling prevents pollutants from entering rivers or groundwater. Together, they keep water clean, maintain habitats, and moderate climate. Example: a forested watershed with treated wastewater reduces contamination, benefiting communities and wildlife downstream.
SECTION D
Long Answer type 5 marks each
Answer in ~80–120 words.
15. Cyclist speeding downhill and slowing uphill
Downhill, gravity adds a component of force along the slope, increasing the cyclist’s acceleration; speed rises if not fully opposed by brakes or friction. Uphill, the component of gravity opposes motion; the cyclist must exert more effort, reducing acceleration or causing deceleration, so speed drops.
Safety measure: use brakes gently and maintain a controlled speed, especially downhill, to prevent loss of control or accidents; wear protective gear and check brakes before descending.
16. Rapid multiplication with identical traits
Suitable method: vegetative propagation such as stem cutting, tuber, or layering.
Basic steps: select a healthy parent plant, take a cutting or prepare part of stem/branch, place it in soil or water to grow roots, and maintain moisture until roots establish.
Benefit: produces plants that retain parent traits (e.g., fruit quality, resistance); useful in home gardens, saves seed costs, and quickly increases plant numbers for food or shade without altering local genetic stock.
SECTION E
Source‑based / Case‑based 4 marks
17.(a) Two real‑life skills
Awareness of environmental stewardship: understanding impacts of forests and wastewater teaches responsible resource use.
Problem‑solving or project planning: identifying local issues, such as water pollution or deforestation, and proposing practical actions or small projects.
(b) Photosynthesis connection
Photosynthesis uses light energy to produce food in plants; forests, full of plants, rely on sunlight to grow and maintain biodiversity. This process also helps regulate air and water cycles, linking forests and the broader environment by supporting life and balancing climate.
(c) Small project or awareness activity and expected outcome
Activity: organise a community clean‑up of a local stream, plant native trees, or run an awareness campaign on reducing wastewater dumping.
Expected outcome: cleaner local water, better habitat for wildlife, increased community involvement, and improved understanding of conservation among students and residents.
