Science Olympiad Previous Year Questions - 1 | Science Olympiad for Class 5 PDF Download

Ans: (c)

Ans: (a)

• The seventh element from the right end in the sequence is #.
• Counting three positions to the left of #, we find ?.
• Thus, the answer is ?, which is the correct choice.

Ans: (c)

• To solve this, we assign a number to each letter: A = 1, B = 2, C = 3, ..., Z = 26.
• For M23J: M(13) + J(10) = 23, which is correct.
• For K27P: K(11) + P(16) = 27, which is also correct.
• For D15H: D(4) + H(8) = 12, which does not equal 15, making it the odd one out.
• For Q37T: Q(17) + T(20) = 37, which is correct as well.

Ans: (A)

Ans: (a)

Ans: (c)

Ans: (d)

• The word ACCENT includes the letter T, which is not found in the original word MAGNIFICENCE.
• All other options, ENGINE, MINING, and MAGIC, can be formed using the letters available in MAGNIFICENCE.
• Thus, ACCENT is the only word that cannot be constructed from the given letters.

Ans: (a)

• In this relationship, a cockroach uses spiracles for breathing.
• Option A is correct because a dolphin breathes using lungs, just like the cockroach uses spiracles.
• Options B, C, and D are incorrect because a whale breathes through lungs, not gills; a grasshopper breathes through spiracles, not moist skin; and a tadpole breathes through gills, not the body surface.

Ans: (c)

• Scutes are not the correct term for the hard covering of insects; instead, they are covered with a hard substance called cuticle.
• Reptile scales indeed come from the epidermis, which is the outer layer of skin.
• Fish scales are known to be flexible and overlapping, allowing for smooth movement in water.
• Porcupines use their spines as a defense mechanism against predators, acting like an armor.

Ans: (b)

• By unscrambling the letters, we find the word MIGRATION.
• This term refers to an adaptation mechanism that allows animals to move to different areas to escape unfavorable conditions.
• Option A describes mimicry, while options C and D relate to camouflage, which are different concepts.
• Thus, the correct answer is that migration helps animals survive by moving away from harsh environments.

Ans: (b)
Organs shown in (b) is kidneys, which are responsible for purify our blood.

Ans: (b)

• Supriya is likely experiencing anaemia, which is primarily due to a lack of iron in her diet.
• Individuals with anaemia often exhibit symptoms such as looking pale and feeling tired easily.
• Iron is essential for producing hemoglobin, which carries oxygen in the blood.
• Ensuring adequate iron intake can help improve her overall energy levels and health.

Ans: (c)

• Hiptage, dandelion, and madar all use wind to disperse their seeds.
• In contrast, Geranium seeds are spread through explosion, making it the odd one out.
• This difference in the method of dispersal is what sets Geranium apart from the others.

Ans: (b)

• Radish and beetroot are known to reproduce vegetatively through their roots.
• In contrast, onion and garlic reproduce via bulbs, while potato reproduces through tubers.
• Bougainvillea reproduces through its stems.
• Thus, the correct answer is the pair that includes radish and beetroot.

Ans: (a)
Hinge Joint works like the hinges in the door. This kind of joint only allows back and forth movement. e.g., Bones in the knee, elbow, fingers, and toes have this type of joint.

Ans: (b)
If the water is poured in to an open hot bowl from the glass, the shape of the water changes. It takes the shape of the container.

Ans: (a)
On the basis of temperature, the girl will identify the difference in glasses. 

Ans: (d)
The paper pieces will get attracted and stick with comb due to electrostatic force.

Ans: (d)

• Chhau is a traditional dance form from West Bengal, not Manipur.
•  Garba is indeed a folk dance from Gujarat, making option (d) the correct match.
• Thang Ta is a martial art dance from Manipur, not Odisha.
• Lavani originates from Maharashtra, not West Bengal.

Ans: (d)

• The skeletal system is essential as it provides a framework of bones that gives our body its shape and support.
• Without bones, our internal organs would not be protected, leading to potential injuries.
• Bones also serve as a structure for muscles to attach, enabling movement.
• Feeling nauseated is not a direct consequence of lacking bones, making options I, II, and III the correct answer.

Ans: (a)

• The process of global warming begins with burning fossil fuels (III), which releases carbon dioxide and other harmful gases into the atmosphere (I).
• These gases then act as greenhouse gases that trap the Sun's heat (IV), preventing it from escaping back into space.
• As a result, the temperature of the Earth increases (II).
• Thus, the correct sequence is III, I, IV, II.

Ans: (b)

• The phase of the Moon that comes right after the New Moon is known as the waxing crescent.
• During this phase, a small sliver of the Moon becomes visible as it starts to grow.
• The term waxing means that the Moon is increasing in illumination.
• This phase is important as it marks the beginning of the Moon's cycle towards being full.

Ans: (d)

• Graphite has several important properties:
• It is slippery, which makes it useful as a lubricant.
• Graphite can conduct electricity due to the movement of electrons between its layers.
• It is non-magnetic and can also conduct heat effectively.
• However, graphite is opaque, meaning it does not allow light to pass through.
• Thus, the correct properties are (i), (ii), (iv), and (v), making option (d) the right choice.

Ans: (c)

• Unscrambling the letters results in the word PLASTIC, which is known to be non-biodegradable.
• Plastic is classified as an insulator, meaning it does not conduct heat or electricity well.
• It is also a poor conductor, making it suitable for various applications where insulation is needed.
• Additionally, plastic is generally non-magnetic, which means it does not attract magnets.

Ans: (c)
The band of seven colours obtained through dispersion is called spectrum.

Ans: (b)
Changes in seasons are caused by revolution of earth.

Ans: (c)

• Kinetic energy is the energy that an object has because of its motion. In this case, a moving car has kinetic energy.
• Potential energy is stored energy based on an object's position, not its movement.
• Hydro energy refers to energy derived from water, while solar energy comes from the sun.
• Thus, the correct answer is kinetic energy, as it directly relates to the movement of the car.

Ans: (b)
Carbon-dioxide is emitted from the unburn particles of fossil fuels.

Ans: (c)

• Hydrilla and tape grass are the only plants that are fully submerged in water.
• Water lily and lotus are considered fixed aquatic plants, meaning they are anchored to the bottom.
• Duckweed and Pistia float on the surface of the water.
• Thus, the total number of completely submerged aquatic plants is 4.

Ans: (c)

• Insectivorous plants are capable of photosynthesis because they contain chlorophyll, which gives them their green color.
• However, they also trap and consume insects to obtain essential nutrients, particularly nitrogen.
• These plants typically grow in nitrogen-deficient soil, which is why they have adapted to catch insects.
• Thus, the correct statement is that they thrive in soil with low nitrogen levels.

• Vulture is the correct answer as it is a known scavenger.
• When we unscramble the letters, we find:
• AADL SRMEN = SALAMANDER
• PNEETALH = ELEPHANT
• HMLAECOEN = CHAMELEON
• URUVTEL = VULTURE
• Among these, the vulture feeds on dead animals, making it a scavenger, while the others are not.

Ans: (d)

• Both cockroaches and grasshoppers share a life cycle that includes three stages.
• Their young ones resemble the adults, indicating a similarity in appearance.
• In both species, the young are referred to as nymphs.
• As they develop, both undergo molting several times.

Ans: (d)
Oil spill from ships is one of the causes of water pollution.

Ans: (a)
A diet that contains adequate amount of different component in right proportion is called a balanced diet.

Ans: (d) 

• Linen is produced from the stem of the flax plant, making it a natural fiber.
• Nylon and polyester are synthetic fibers, not derived from plants.
• Cotton comes from the fruit of the cotton plant, not the stem.
• Thus, the correct answer is Linen, as it is the only option that fits the description of being a natural fiber from the stem.

Ans: (c)

• To extinguish a fire caused by flammable liquids like petrol, it is best to throw lots of sand on it. This helps to cut off the oxygen supply, which is essential for the fire to burn.
• Using water is ineffective because oil, such as petrol, floats on water and will continue to burn.
• Additionally, switching on the electric supply or turning on the gas supply could make the situation worse.

Ans: (d)
Lungs→Heart→Body→Heart→Lungs

Ans: (d)

• Salt and sugar are both solids, while vinegar is a liquid.
• Option A consists entirely of solids.
• Option B is made up of gases.
• Option C contains only liquids.

Ans: (c)
Many plants scatter their seeds in order to ensure that they do not grow too close to one another. The process by which the seeds are scattered away from the mother plant is called dispersal of seeds.

Ans: (d)

• Work is defined in physics as the transfer of energy that occurs when a force is applied to an object, causing it to move.
• In options A, B, and C, each activity involves a force causing movement, which means work is being done.
• Therefore, since all activities involve movement due to applied force, the correct answer is All of these.

Ans: (b)

• The percentage of oxygen in the atmosphere is around 21%, which is significantly lower than 51%.
• Nitrogen makes up about 78% of the atmosphere, while carbon dioxide is only about 0.04%.
• The remaining 0.96% consists of other gases, which include argon and trace gases.
• Thus, option (b) is the incorrect match regarding the gas percentages.

Ans: (c)

• Kushagra saw a Half Moon (First Quarter) on 12th May, 20XX.
• By 22nd May, 20XX, the Moon will transition to a Waning Gibbous Moon.
• This means it will appear more than half but less than full, as it moves towards the New Moon phase.
• The phases of the Moon change in a predictable cycle, which helps in determining its shape on different dates.

Ans: (b)

• The Venn diagram categorizes various types of waste. The correct option includes burning fossil fuels, which is a significant source of pollution, along with hospital wastes, burning firecrackers, and volcanic eruptions, all of which contribute to environmental issues.
• Each of these elements represents a different type of waste that impacts the environment.
• Understanding these categories helps in recognizing the sources of pollution and their effects.
• Thus, option (b) accurately reflects the types of waste shown in the Venn diagram.

Ans: (b)

• Shale is a type of sedimentary rock, while marble is classified as a metamorphic rock and obsidian is an igneous rock.
• The other options mix different types of rocks incorrectly, as they do not follow the same classification.
• Understanding the categories of rocks is essential: sedimentary, metamorphic, and igneous.
• Thus, option (b) correctly represents one from each category.

Ans: (c)
In the given figure, P is stem, Q is leaf, R is seed and S is root. The edible part in rajma, soybean and pea is seed.

Ans: (d)
Joints are the places where two bones are joined together. ‘X’ represents joint between bones in the skull which shows no movement, Y-type joint (hinge joint) present between lower jaw and skull, is also present in elbow. It allows movement in only one direction. Cartilaginous joints are found between vertebrae that allow slight movement of bones unlike the ‘X’ type joint.

Ans: (b)

• Syringe X has 30 cm³ of water, while syringe Y has 30 cm³ of air.
• Both syringes have sealed tips, meaning no liquid or gas can escape.
• When the plungers are pushed, the air in syringe Y can be compressed easily, allowing its plunger to move further.
• In contrast, the water in syringe X is not compressible, so its plunger will not move as far.