Science Olympiad Model Test Paper - 1 | Science Olympiad Class 4 PDF Download

Ans: (c)

• To find out how many elements remain after removing the symbols, we first identify the letters and numbers in the arrangement.
• The given arrangement is: S # A 1 P @ R ! 4 T U $ K O 5 L N * H 8.
• Counting the letters (S, A, P, R, T, U, K, O, L, N, H) gives us 11 letters.
• Counting the numbers (1, 4, 5, 8) gives us 4 numbers.
• So, the total number of elements left after removing symbols is 11 letters + 4 numbers = 15 elements.

Ans: (c)
There are 15 circles in the given figure.

Ans: (d)

• The word CHOCOLATE contains the letters: C, H, O, L, A, T, E.
• CATCH can be formed using C, A, T, and H.
• CLOTH can be formed using C, L, O, T, and H.
• CHEAT can be formed using C, H, E, A, and T.
• However, CLASH requires an S, which is not present in the letters of CHOCOLATE.

Ans: (b)
Dictionary arrangement of words is as follows Epigene, Epilogue, Episode, Epitaxy, Epitome i.e., 3, 5, 2, 1, 4

Ans: (d)
Meaningful word is P U Z Z L E 4 2 3 6 1 5

Ans: (c)
Some important organ systems are digestive, respiratory, circulatory, skeletal and nervous.

Ans: (a)
The bones (part of skeletal system) help in defining the structure of the body.

Ans: (a)

• The plant relies on its leaves for photosynthesis, which is the process of converting sunlight into energy.
• Without leaves, the plant cannot produce food, leading to a lack of energy.
• Over time, this will cause the plant to weaken and eventually die due to starvation.
• In summary, the absence of leaves means the plant cannot sustain itself, resulting in its demise.

Ans: (b)

• Melting is the process where a solid turns into a liquid when it is heated.
• In this case, the picture likely depicts a solid substance that is changing into a liquid form.
• This is different from freezing, which is the opposite process, where a liquid becomes a solid.
• Evaporation involves a liquid turning into a gas, while condensation is when a gas turns back into a liquid.

Ans: (a)
The skeletal system is made up of all the bones inside our body.

Ans: (d)

• To make a fruit salad, fresh fruits are essential.
• A greengrocer specializes in selling fruits and vegetables, making it the best choice.
• Other options like a baker focus on bread, a mason works with stone, and a chemist sells medicines.
• Thus, the most suitable place for Ritika to buy fruits is the greengrocer.

Ans: (a)

• Light-colored clothing is preferred in summer because it reflects sunlight, which helps to keep the body cool.
• In contrast, dark colors tend to absorb heat, making you feel warmer.
• Wearing white or light colors is a simple way to stay comfortable in hot weather.
• This choice is based on the basic principle of how colors interact with light and heat.

Ans: (b)
It acts as a protective cover for the brain.

Ans: (b)

• Apollo 11 was the first mission to land humans on the Moon, and its crew included Neil Armstrong, Edwin Aldrin, and Michael Collins.
• Kalpana Chawla was an astronaut, but she was not part of the Apollo 11 mission; she flew on different space missions later.
• The mission took place in 1969, and Armstrong famously became the first person to walk on the Moon.
• Understanding the crew members is essential to grasping the history of space exploration.

Ans: (b)

• The statement about a screw is incorrect because a screw is not defined by a grooved wheel and rope; instead, it is a simple machine that converts rotational motion into linear motion.
• A see-saw is indeed a lever, which is a type of simple machine that helps lift loads.
• The person with a heavy load is not doing work in the physics sense, as work requires movement in the direction of the force applied.
• A wedge is correctly described as being made up of two inclined planes, which helps in splitting or cutting objects.

Ans: (a)

• Bulbuls are known for their unique nesting habits, particularly their ability to create a cup-shaped nest in bushes.
• Unlike penguins, which do not build traditional nests, bulbuls prefer dense foliage for protection.
• Weaver birds create intricate woven nests, while woodpeckers typically excavate holes in trees.
• Thus, the correct answer is the bulbul, as it is specifically known for this type of nesting behavior.

Ans: (c)
The combination of various bones together makes one major bone structure like skull, rib cage, backbone, etc.

Ans: (c)
These later on fuse to form 206 bones in an adult human being.

Ans: (a)

• Fish have scales that serve to protect their bodies, which is true.
• They typically reproduce by laying many eggs at once, making statement (ii) correct.
• However, statement (iii) is incorrect because gills are used for breathing underwater, not for swimming faster.
• Thus, the correct options are (i) and (ii) only, leading to the answer (a).

Ans: (b)
It forms the chest of the skeletal.

Ans: (a)
Elbow and knee joints moves only in one direction.

Ans: (c)

• Teeth play a crucial role in digestion by mechanically breaking down food.
• They cut, chew, and grind food into smaller pieces, making it easier for the stomach to digest.
• While saliva is important, it is produced by glands, not teeth.
• Teeth do not produce acid or roll food into balls; their main function is to prepare food for swallowing.

Ans: (a)

• Sleeping sickness is caused by a protozoan parasite called Trypanosoma, transmitted by tsetse flies.
• In contrast, Dengue is caused by a virus, Tuberculosis is caused by bacteria, and Ringworm is a fungal infection.
• Protozoans are single-celled organisms, and they can lead to various diseases in humans.
• Understanding the type of organism responsible for a disease helps in determining the appropriate treatment.

Ans: (a)
In frog hind limb is longer than forelimbs.

Ans: (c)

• Slow down the speed of his car is the correct action when encountering a road sign that likely indicates a need for caution.
• Road signs are there to provide important information about the road conditions ahead.
• By slowing down, Rohit can ensure his safety and the safety of others on the road.
• Speeding up or honking would not be appropriate responses to a warning sign.

Ans: (a)
These are motor nerves and sensory nerves.

Ans: (d)
The arms and legs of the skeletal are formed by the limbs.

Ans: (c)
The spinal cord fits inside the cavities in the backbone.

Ans: (a)
It is the vertical bone that joins all the curved bones of the rib cage. It provides the strength to the rib cage.

Ans: (a)
Sensory nerves make the brain aware about the sight, smell, touch, hearing and taste senses.

Ans: (d)
Brain has more neurons than spinal cord. Spinal cord is also called the ‘second brain’.

Ans: (d)
The three main parts of the brain can be arranged in the order as of the given figure as Medulla, Cerebellum and Cerebrum.

Ans: (b)
Cervical is present in the neck, Thoracic in the upper back and lumbar in the lower back.

Ans: (c)

• The question asks for statements that are incorrect about planets.
• Statement (i) is correct; Jupiter does take about 12 years to orbit the Sun.
• Statement (ii) is incorrect; Mars actually has two small moons, Phobos and Deimos.
• Statement (iii) is correct; Saturn does have a long revolution period, but it is not the longest; that title goes to Neptune.
• Statement (iv) is correct; Venus does rotate from East to West, which is opposite to most planets.
• Thus, the incorrect statements are (ii) and (iii), making option (c) the right choice.

Ans: (b)
The tarsals connect the feet to the skeletal.