Science Olympiad Previous Year Paper - 2 | Science Olympiad for Class 2 PDF Download

Ans: (b)
Rectangles: R₁, R₂, R₃, R₄, R₅, R₆, R₇ and R₈ i.e., 8 in number

Ans: (b)
The pattern repeats itself after every four figures

Ans: (c)

• Drinking water is usually a quick activity, often taking just a few seconds.
• In contrast, eating food can take several minutes, and sleeping requires hours.
• Studying also demands a significant amount of time for effective learning.
• Thus, among these options, drinking water is the fastest activity.

Ans: (a)
 is used to cook food, but is called

Ans: (d)
So, 3 groups of 5 frogs each can be formed.

Ans: (d)

• The color of shadows is generally black or dark because they are created when an object blocks light.
• In this case, both the pink dress and the blue umbrella will cast shadows that appear black due to the absence of light in those areas.
• Shadows do not take on the color of the object; instead, they are typically a darker shade.
• Therefore, the shadows of both the dress and the umbrella will be black.

Ans: (c)

• Herbivore: A rhinoceros is a plant-eating animal, making it a true herbivore.
• Carnivore: A shark is a meat-eater, fitting the definition of a carnivore.
• Scavenger: A jackal feeds on dead animals, which classifies it as a scavenger.
• The other options mix up the classifications incorrectly, as they do not align with the correct definitions of these animal types.

Ans: (b)
Train-Railways 
Helicopter-Airways 
Steamer-Waterways

Ans: (c)

• The question asks for a group name for cats, which is "clowder".
• By unscrambling the letters in option (c) WEDOLRC, we can form the word "clowder".
• Options (a), (b), and (d) do not form any relevant group name for cats.
• Thus, the correct answer is option (c) as it leads to the correct term.

Ans: (a)

• Plumbers are the professionals who specialize in repairing and installing water systems, including taps and pipes.
• They have the necessary skills and tools to handle issues related to water supply and drainage.
• Other options like carpenters, painters, and electricians focus on different trades and do not deal with plumbing issues.
• Thus, the correct answer is (a) Plumber, as they are specifically trained for this type of work.

Ans: (c)
A telescope is an instrument used to see distant objects.

Ans: (d)
The picture is of hot air balloon. It is an example of air transport and option (d) helicopter is also the means of air transport.

Ans: (c)
The symbol shown is related to E-mail (Electronic mail). Email is an electronic message send over a network such as the Internet.

Ans: (c)
Ambulance is used to carry sick people to the hospital.

Ans: (c)

• Correct answer is (c) because items like a Laptop, Balloon, Swimming float, and Wooden chair do not need air to function or exist.
• In contrast, the other options include living things or elements that require air, such as Birds and Plants.
• For example, Birds and Trees need air for breathing and photosynthesis, respectively.
• Thus, option (c) is the only group that consists entirely of items that can exist without air.

Ans: (d)

• Igloos are unique structures made from snow, which might seem cold but actually provide warmth inside.
• The reason for this warmth is that snow acts as an insulator, preventing the heat from escaping.
• Additionally, the dome shape of the igloo helps shield it from harsh winds, keeping the interior cozy.
• Thus, both the properties of snow and the design of the igloo contribute to its ability to retain heat.

Ans: (d)

• Dr. S. Radhakrishnan is honored on Teachers’ Day, which is why (a) matches with (4).
• Mahatma Gandhi is remembered on Martyrs’ Day, so (b) corresponds to (3).
• Jawaharlal Nehru is celebrated on Children’s Day, making (c) align with (1).
• Sardar Vallabhbhai Patel is recognized on National Unity Day, thus (d) pairs with (2).

Ans: (a)

• Rivers are natural flowing watercourses that provide a significant source of freshwater.
• The sea and ocean contain saltwater, which is not suitable for drinking or irrigation.
• While all these bodies of water exist, only rivers are classified as sources of freshwater.
• Thus, the correct answer is (a) River.

Ans: (b)

• Rickshaw: Best for door to door service.
• Aeroplane: Fastest means of transport.
• Ship: Best for transport of petrol.

Ans: (a)

• Milk is rich in calcium, which is essential for strong bones and teeth.
• Calcium helps in the development and maintenance of bone density.
• Other options like apple, grapes, and carrot do not provide the same level of calcium.
• Including milk in your diet is a great way to support your skeletal health.

Ans: (b)

• Cotton plant is commonly found in fields and is known for its fluffy white fibers.
• It is primarily grown for its cotton which is used in textiles.
• Other options like jute and coconut are not typically found in fields in the same way.
• Money plant is usually a houseplant and not grown in fields.

Ans: (a)

• Linen is a fabric made from the fibers of the flax plant.
• The correct part of the plant used for making linen is the stem, where the fibers are found.
• Options (b), (c), and (d) are incorrect because they either mention the wrong part of the plant or the wrong plant.
• Thus, the correct answer is (1)-Stem and (2)-Flax.

Ans: (b)

• Brain is often referred to as the master organ because it controls all functions of the body.
• It processes information, coordinates movements, and regulates emotions.
• The brain is essential for thinking, memory, and decision-making.
• Without the brain, the body cannot function properly, making it the most important organ.

Ans: (d)

• Clean drinking water is considered to be colorless, odorless, and tasteless. This means it should not have any color, smell, or flavor that could indicate contamination.
• When water meets these criteria, it is generally safe for consumption and is classified as clean.
• Therefore, the correct answer is All of these, as all the characteristics mentioned are true for clean drinking water.

Ans: (d)

• The relationship shows that Chilli powder is derived from the fruit of the chilli plant, just as sugar is derived from the stem of the sugarcane plant.
• In this analogy, the blank should be filled with the part of the plant that produces the chilli powder, which is the fruit.
• Thus, the correct answer is (d) Fruit, as it maintains the same type of relationship as the one given for sugar and stem.

Ans: (d)

• Drying of clothes requires air because it helps in the evaporation of water from the fabric.
• When clothes are exposed to air, the moisture evaporates, making them dry.
• In contrast, activities like bathing, mopping, and swimming do not specifically need air for their primary function.
• Thus, the correct answer is drying of clothes, as it directly involves the process of air aiding in drying.

Ans: (d)

• The sequence lists planets in order from the Sun.
• After Venus and Earth, the next planet is Mars.
• Jupiter follows Mars in the solar system.
• Thus, X is correctly identified as Mars.

Ans: (b)

• Watermelon is a fruit that grows on the ground and is known for having many seeds inside it.
• It is a popular summer fruit, enjoyed for its sweet and juicy flesh.
• In contrast, options like bitter gourd, pomegranate, and grapes do not fit the description as well as watermelon does.
• While pomegranates have seeds, they do not grow along the ground like watermelons.

Ans: (d)

• Children enjoy building a snowman and playing in the snow when it is cold outside.
• This activity is most commonly associated with the winter season, when snow is abundant.
• In contrast, the other seasons like summer, spring, and autumn do not typically have snow.
• Thus, the correct answer is winter, as it is the season known for snow activities.

Ans: (d)

• The correct answer is YESE, which unscrambles to EYES.
• Eyes are the sense organs responsible for vision, allowing us to see objects in the sky, including the Big Dipper constellation.
• Each of the other options does not form a valid word related to a sense organ.
• Thus, the only option that correctly identifies the organ used for seeing is (d) YESE.

Ans: (c)
Boat (X) moves on water and bicycle (Y) does not move on water.

Ans: (d)
A letter needs the address of the receiver, PIN(Postal Index Number) code and a stamp to reach its destination.

Ans: (a)

E-mail is an example 

of telecommunication. It is a twoway communication because a feedback is send from the receiver to the sender. This allows the sender to know the message was received accurately by the receiver.

Ans: (c)
Birthday party is a family occasion while others are festivals.

Ans: (c)
Tanga is a cart drawn by horse. It is slowest among the all.