Science Olympiad Previous Year Questions - 1 | Science Olympiad for Class 3 PDF Download

Ans: (a)
The pattern repeats after 2nd figure. Only pattern in option (A) follows this pattern.

Ans: (c)

• The word "NATIONAL" contains the letters N, A, T, I, O, N, A, L.
• Among the options, "LATINA" can be formed using these letters.
• Other options like "ACTION", "ONLINE", and "ANALOG" cannot be fully constructed from the letters in "NATIONAL".
• Thus, the correct answer is "LATINA".

Ans: (d)

So, alphabet K is not hidden in the given figure.

Ans: (c)
In sunlight Rohit will wear cap but cap is called pencil.

Ans: (d)
Rain is source of water. Water gets; collected in pond, river and lake. So, rain is different.

Ans: (d)

• Woody trunk refers to plants that have a hard, thick stem, which is typical for trees.
• The Mango tree is a prime example of this, as it has a strong, woody trunk that supports its height and branches.
• In contrast, options like Coconut and Gulmohar do not have woody trunks, and Grapevine grows along the ground, making them incorrect matches.
• Thus, the correct match is the Mango with a woody trunk.

Ans: (b)

• Exhaled air contains less oxygen because our body uses it during respiration.
• It has more carbon dioxide since this gas is a byproduct of the energy production process in our cells.
• Inhaled air has a higher concentration of oxygen and a lower concentration of carbon dioxide.
• This difference is crucial for maintaining the body's breathing balance and overall health.

Ans: (c)
The thick fur prevents the body heat from escaping into the environment and therefore, helps those animals to cope up with the extreme climate conditions.

Ans: (a)
The sweet nectar present in flowers which is used as food by the butterflies.

Ans: (d)

• Plastic is a popular choice for water tanks because it has several advantages. First, it does not rust, which is a common issue with metal tanks.
• Secondly, plastic is durable and does not break easily, making it suitable for outdoor use.
• Additionally, plastic does not absorb water, ensuring that the water remains clean and uncontaminated.
• Therefore, the correct answer is that all these benefits make plastic a preferred material for water tanks.

Ans: (a)
Scales protect the animals from physical harm.

Ans: (c)
Birds and mammals are the only groups of animals which are warmblooded, rest all are cold-blooded. 

Ans: (d)

• The statement that you should never take a shower before and after swimming is incorrect.
• In fact, it is recommended to take a shower before swimming to rinse off any dirt and oils, and after swimming to wash off chlorine or saltwater.
• The other options highlight important safety practices, such as avoiding dark places and not locking doors when alone for safety reasons.
• Thus, option (d) is the only statement that is not true.

Ans: (c)
Snakes do not have ears. Their skin senses sound vibrations on the ground and the brain interprets the message.

Ans: (d)

• All of these options are available for purchase at a post office. This includes an inland letter, which is used for sending letters within the country, a postcard for sending short messages, and stamps which are necessary for mailing items.
• Post offices serve as a one-stop shop for various mailing needs, making it convenient for customers.
• Therefore, the correct answer is that you can buy all of these items from a post office.

Ans: (c)

• Precipitation refers to the process where water falls from the atmosphere to the Earth's surface.
• This can occur in various forms such as rain, hail, or snow.
• It is a crucial part of the water cycle, helping to replenish water sources.
• Options (a), (b), and (d) describe different processes related to water but do not define precipitation.

Ans: (c)
The light body weight, the streamline body shape helps to penetrate air and modified forelimbs are transformed wings which help the birds to fly.

Ans: (d)
This serves as a camouflage for animals in desert for camels to unpredict themselves from predators.

Ans: (b)
A zebra has alternate black and white randomly-shaped stripes on the skin.

Ans: (b)
Egg and meat are the richest sources of proteins.

Ans: (d)

• Down feathers are the type of feathers that are small, fluffy, and soft.
• They provide excellent insulation, helping to keep the bird's body warm.
• Unlike flight feathers, which are long and stiff, down feathers are designed for warmth.
• These feathers are found underneath the outer feathers and are crucial for temperature regulation.

Ans: (c)

• The correct answer is OSARTGIN, which unscrambles to STIR-FRYING.
• Stir-frying is a cooking method that uses a small amount of oil and does not require water.
• In contrast, boiling (option b) and steaming (option a) both involve water.
• Thus, the only method listed that does not need water is stir-frying.

Ans: (b)

• Using excessive refined oil in our daily cooking can lead to an increase in calorie intake.
• Refined oils are high in fats, which can contribute to weight gain if consumed in large amounts.
• When we consume more calories than our body needs, the excess is stored as fat, leading to weight gain.
• It's important to use oils in moderation to maintain a healthy weight.

Ans: (d)

• Cinema is a form of mass communication that reaches a large audience through films.
• Post card is a personal communication method, allowing individuals to send messages directly to others.
• The pairing of Cinema and Post card effectively illustrates the contrast between mass and personal communication.
• Other options do not correctly represent this distinction, as they either mix two personal methods or two mass methods.

Ans: (c)

• The relationship shows that the kidney is protected by the skin.
• Similarly, the brain is protected by the skull.
• Among the options, the spinal cord is the correct answer as it is associated with the brain in the central nervous system.
• The other options do not provide the same protective relationship as the kidney and skin.

Ans: (c)
Camel is called ‘The Ship of the Desert.’

Ans: (b)
Small intestine is longest part of our digestive system which is around 7 meter in length.

Ans: (c)

• Butter paper is the only option that allows light to pass through, making it translucent.
• Wooden log and iron sheet are both opaque, meaning they do not let any light through.
• Notebook is also opaque as its pages are made of paper.
• Thus, butter paper stands out as it is the only material that is not completely opaque.

Ans: (c)

• The term food chain describes the interconnected relationships between plants and animals in an ecosystem.
• In a food chain, plants are the primary producers, and they are eaten by herbivores (plant-eating animals).
• These herbivores can then be consumed by carnivores (meat-eating animals), creating a chain of energy transfer.
• This concept illustrates how energy and nutrients move through the ecosystem, highlighting the dependence of different species on one another.

Ans: (d)

• Rocks do not play a direct role in determining the weather conditions of a place.
• The Sun, Rain, and Clouds are all essential elements that significantly impact weather patterns.
• For example, the Sun provides heat and light, while clouds can indicate precipitation.
• In contrast, rocks are part of the landscape but do not influence weather changes.

Ans: (c)
The giant panda lives the major part of life in solitude to avoid competition

Ans: (c) 
Sponges are primitive and simple animals and lack organs for hearing, smell and taste.

Ans: (c)
The large ears of elephants have blood vessels that help in regulating body temperature.

Ans: (b)
The dogs have excellent sense of smell and can be relied to follow the smell for kilometres.

Ans: (c)
The food is churned the stomach thereby increasing the surfacearea for quicker enzyme action.