Are You Smarter Than Homer Simson In Grade 5 Science?

1. Arnav found a scratch on the body of his car. which of these is most likly to have caused the scratch?

Sponge

Eraser

Metal key

Skin of a dog

None of the above

The most likely cause of the scratch on the body of Arnav's car would be a metal key. This is because metal keys are hard and can easily scratch the surface of a car's body. Sponge, eraser, and the skin of a dog are not typically hard enough to cause a scratch on a car. Therefore, the metal key is the most plausible explanation for the scratch.

Explanation

The most likely cause of the scratch on the body of Arnav's car would be a metal key. This is because metal keys are hard and can easily scratch the surface of a car's body. Sponge, eraser, and the skin of a dog are not typically hard enough to cause a scratch on a car. Therefore, the metal key is the most plausible explanation for the scratch.

2. Arman and Arnav are playing a game,arman has to find out what arnav is thinking aboutby asking questions.Arnav can answer only yes or no

Arman:is it an animal?
Arnav:yes.
Arnav:can it's ear be seen?
Arnav:no.
Arman:does it lays egg?
Arnav:yes.
Arman:does it has feathers?
Arnav:no.

which of the following can be Arman's guess?

Rabbit

Snake

Pigeon

Tiger

Homer simpson

Based on the given information, Arman is trying to guess what Arnav is thinking about. Arnav confirms that it is an animal and that its ear cannot be seen. Arnav also confirms that it lays eggs but does not have feathers. Based on these clues, the only possible option is a snake, as snakes are animals, their ears are not visible, they lay eggs, and they do not have feathers. Therefore, Arman's guess would be a snake.

Explanation

Based on the given information, Arman is trying to guess what Arnav is thinking about. Arnav confirms that it is an animal and that its ear cannot be seen. Arnav also confirms that it lays eggs but does not have feathers. Based on these clues, the only possible option is a snake, as snakes are animals, their ears are not visible, they lay eggs, and they do not have feathers. Therefore, Arman's guess would be a snake.

3. Which of the following causes both air and sound pollution?

Bursting fire crackers

Washing clothes in the river

Burning garbage on the road

Playin loud music in the open places

None of the above

Bursting firecrackers causes both air and sound pollution. Firecrackers release harmful chemicals and pollutants into the air, contributing to air pollution. The loud explosions also create high levels of noise pollution, which can be damaging to human health and disrupt the environment.

Explanation

Bursting firecrackers causes both air and sound pollution. Firecrackers release harmful chemicals and pollutants into the air, contributing to air pollution. The loud explosions also create high levels of noise pollution, which can be damaging to human health and disrupt the environment.

4. Plants loose excess water thruough parts like leaves, stems and flower

In order to reduce the loss of water , which of the following parts is missing in some desert plants?

Roots

Stem

Leaves

Nothing

Seeds

Desert plants often face extreme arid conditions, where water is scarce. To adapt to this environment, some desert plants have evolved to reduce water loss. One of the ways they achieve this is by reducing or completely eliminating their leaves. Leaves are the main site of transpiration, where excess water is lost through tiny openings called stomata. By lacking leaves, desert plants minimize the surface area available for transpiration, helping them conserve water and survive in their harsh surroundings. Therefore, the missing part in some desert plants that reduces water loss is leaves.

Explanation

Desert plants often face extreme arid conditions, where water is scarce. To adapt to this environment, some desert plants have evolved to reduce water loss. One of the ways they achieve this is by reducing or completely eliminating their leaves. Leaves are the main site of transpiration, where excess water is lost through tiny openings called stomata. By lacking leaves, desert plants minimize the surface area available for transpiration, helping them conserve water and survive in their harsh surroundings. Therefore, the missing part in some desert plants that reduces water loss is leaves.

5. Reflexes make or body react in a certain way to a certain signal , the body reacts in the same way when every time the signal is present. some reflexes have to be learned . while some happen naturaly without any previous learning , such reflexes are called natural reflexes .

whcih of the following is a natural reflex????

A batsman hitting a ball with a bat

Driving motor vechile in heavy trafic

Clapping hands at the end of the show

Pulling hand back on touching a stove

None of the above

The correct answer is "pulling hand back on touching a stove" because it is a natural reflex that occurs without any previous learning. When the hand touches a hot stove, the body automatically pulls the hand back to avoid injury. This reflex is an innate response to protect the body from harm.

Explanation

The correct answer is "pulling hand back on touching a stove" because it is a natural reflex that occurs without any previous learning. When the hand touches a hot stove, the body automatically pulls the hand back to avoid injury. This reflex is an innate response to protect the body from harm.

6. Common cold is caused by a harmful organism which spreads through air . we can also catch a cold by touching surfaces were d\thsi organism is present. which of the following is the best method to decrease the chances of getting a cold?

Switching on the fan

Having a proper diet

Washing hands regularly

Wearing warm clothes

NONE OF THE ABOVE

Washing hands regularly is the best method to decrease the chances of getting a cold because it helps to remove any harmful organisms, including the one that causes the common cold, that may have been picked up from touching surfaces. Switching on the fan, having a proper diet, and wearing warm clothes do not directly prevent the spread of the harmful organism that causes the common cold.

Explanation

Washing hands regularly is the best method to decrease the chances of getting a cold because it helps to remove any harmful organisms, including the one that causes the common cold, that may have been picked up from touching surfaces. Switching on the fan, having a proper diet, and wearing warm clothes do not directly prevent the spread of the harmful organism that causes the common cold.

7. Around 1940,the brown nakes were brought to snake free island of Guam. Because of the certain group of organisms was entirely destroyed and this led to the rapid increased in the number of insects.

the destroyed organisms were probably_________

Bird

Tiger

Fish

Monkey

None of the above.

The correct answer is bird. The explanation for this is that birds are known to be natural predators of insects. When the brown snakes were brought to the snake-free island of Guam, they likely caused the destruction of bird populations. With the absence of birds, there was no longer a natural check on the insect population, leading to a rapid increase in their numbers.

Explanation

The correct answer is bird. The explanation for this is that birds are known to be natural predators of insects. When the brown snakes were brought to the snake-free island of Guam, they likely caused the destruction of bird populations. With the absence of birds, there was no longer a natural check on the insect population, leading to a rapid increase in their numbers.