GRADE-8 ASSET MOCK TEST- 2

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Question 1 of 45

Select more than one correct option.

Select one or more of the following:

Explanation

Question 2 of 45

Choose the correct option.

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Explanation

Question 3 of 45

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Select one of the following:

Explanation

Question 4 of 45

Select all the wrong options.

Select one or more of the following:

Explanation

Question 5 of 45

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Explanation

Question 6 of 45

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Question 7 of 45

Select from the dropdown lists to complete the text.

( Mangroves, Coniferous, Boreal, Deciduous ) forests have three to four layers of plant growth. Tall deciduous trees make up the ( top, bottom, middle ) layer and create a moderately thick forest canopy. The second layer includes trees of shorter height . The third layer includes shrubs.Forest ( shrubs, herbs, trees, short trees ) make up the bottom-most fourth layer.

Explanation

Question 8 of 45

Select all the wrong options.

Select one or more of the following:

Explanation

Question 9 of 45

If equal weights of all the three state of substance X are taken,which state will have the MAXIMUM number of molecules?

Select one or more of the following:

Solid
Only gas and liquid
Gas
Only solid and liquid
Liquid
Number of molecules will be different.

Explanation

Question 10 of 45

Choose the correct option.

Select one of the following:

Explanation

Question 11 of 45

Choose the correct option.

Select one of the following:

Explanation

Question 12 of 45

Our bodies are continuously growing. Small particles from the digested food are assembled to form large complex particles that make up the body material.

Select one of the following:

Only immediately after eating food.
Only immediately after digestion of food.
Only immediately before digestion of food.
It occurs all the time in our bodies.

Explanation

Question 13 of 45

Choose the correct option.

Select one of the following:

Explanation

Question 14 of 45

Choose the correct options.

Select one or more of the following:

P to Q
S to P
R to S
Q to S

Explanation

Question 15 of 45

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Select one or more of the following:

Problem 1
Problem 2
Problem 3
Problem 4

Explanation

Question 16 of 45

Choose the correct option.

Select one of the following:

Explanation

Question 17 of 45

Which of these characteristics is found in all insects?

Select one of the following:

external skeleton
jumping legs
2 pairs of wings
2 pairs of legs

Explanation

Question 18 of 45

Which of the following would be a chemical change?

Select one or more of the following:

A metal on heating to a high temperature turns in to a liquid form.
A metal gets a greenish coating on exposure to air.
A metal is drawn in to wires.
A metal is beaten in to sheets.
A metal is slowly oxidised to produce rust.

Explanation

Question 19 of 45

Select the correct option.

Select one of the following:

Explanation

Question 20 of 45

Select the correct option.

Select one of the following:

Explanation

Question 21 of 45

Select all the correct options.

Select one or more of the following:

high lustre
stable at high temperatures
highly ductile
electrical insulator

Explanation

Question 22 of 45

Select from the dropdown lists to complete the text.

Diseases are caused by microorganisms. ( Malaria, Cholera, Chickenpox, Polio ) is caused by an organism that is transferred by mosquitoes.Measles are a contagious disease caused by a ( bacteria, virus, protozoa, fungi ). Common cold cannot be spread by flies.

Explanation

Question 23 of 45

Which of these statements gives a correct reason as to why our body needs water?

Select one or more of the following:

to provide us with energy
to helps us to eliminate waste
to regulate body temperature

Explanation

Question 24 of 45

Select the correct option.

Select one of the following:

Explanation

Question 25 of 45

Fill the blank space to complete the text.

Combustion of fuels produces carbon dioxide. If it is present in excess, it traps the heat produced by sun rays in the atmosphere and prevents it from being reflected back. This causes over-heating of Earth, eventually resulting in .

Explanation

Question 26 of 45

Fill the blank space to complete the text.

Sweating helps to expel water, small amount of urea and salts through the sweat glands present in the skin. These are excreted in the form of sweat. Sweating also helps in our body when the temperature is high

Explanation

Question 27 of 45

Select the correct option.

Select one of the following:

Explanation

Question 28 of 45

Select the correct option.

Select one of the following:

Explanation

Question 29 of 45

Roma has 3 solid metallic balls, all of equal weight. The sizes of the 3 balls are as shown below. If the ball 2 sinks in water, which of the other balls will DEFINITELY sink in water?

Select one of the following:

only ball 1
only ball 3
both ball 1 and ball 3
cannot be sure

Explanation

Question 30 of 45

Varun filled some water in a plastic bottle and closed its cap tightly. He weighed the bottle and then kept it in the sun. When he weighed the bottle again after two hours he noticed some water droplets inside the bottle as shown in the figure.

What is the weight of the bottle likely to be now?

Select one of the following:

more than before
less than before
the same as before
cannot say without knowing the actual surrounding temperature.

Explanation

Question 31 of 45

Non-metals and metals both react with oxygen to form oxides. What will happen if these oxides are dissolved in water separately?

Select one of the following:

A) Both the metallic oxides and the non-metallic oxides will form acids.
B) The oxides will get dissolved in water and will not change chemically.
C) The metallic oxides will form bases and non-metallic oxides will form acids.
D) They will react with water to form respective elements and will liberate oxygen gas.

Explanation

Question 32 of 45

Pasteurisation of milk involves heating of milk for a certain period of time at a particular temperature and then suddenly cooling it. Which of the following are the benefits of pasteurisation ?

Select one of the following:

the milk cannot be stored without spoilage for a long time
the milk gets sterilized and free from all bacteria.
the milk gets free from most of the harmful bacteria.

Explanation

Question 33 of 45

Which of the following increases when a thermometer is placed in hot water ?

Select one or more of the following:

mass of mercury
volume of mercury
number of atoms of mercury
temperature of mercury

Explanation

Question 34 of 45

Water is removed from foods because dried foods can be stored for longer periods without getting spoilt. The graphs given below show the water content originally in four different foods.
Water was almost completely removed by passing dry air through each of these four foods. If the weight of each of them after that was 50 grams, which one was the heaviest to start with?

Select one of the following:

Cucumber
Apple
Butter
Bread

Explanation

Question 35 of 45

The density of ice is less than that of water. Shown here is a beaker that contains ONLY SOLID ICE. The initial level is as indicated in the figure.

If all the ice becomes water, the level will -------------------

Select one of the following:

go up
come down
remain at the same place

Explanation

Question 36 of 45

The white blood cells protect the body from infection by attacking the germs that invade our body and engulfing them in the same manner as an amoeba captures its food. Which of these characteristics is/are likely to help a white blood cell to perform this function?

Select one or more of the following:

the ability to move independently
the presence of a nuclear membrane
the ability to constantly change its shape

Explanation

Question 37 of 45

There are 2 mirrors in a fully lighted room, and a boy , a girl and a dog, as shown in the figure below. The boy is looking at mirror 1 and the girl is looking at mirror 2. Which of the following will be true?

Select one or more of the following:

The boy can see only himself in mirror 1 and the girl can see only herself in mirror 2.
The boy can see only himself and the dog in mirror 1.
The girl can see herself, the boy and the dog in mirror 2.
The boy can see himself ,the girl, and the dog in mirror 1 and the girl can see herself, the boy and the dog in mirror 2.

Explanation

Question 38 of 45

The pH of a substance is a measure of its acidity as shown in the scale below:

When Suresh complained of acidity, his doctor prescribed a liquid antacid which gave him relief. Which of these could not be the pH of the antacid?

Select one or more of the following:

Explanation

Question 39 of 45

Two beakers contain the same amount of water at the same temperature. An antacid tablet is CRUSHED and dropped into beaker P. The time taken for it to dissolve is recorded. Next, an identical antacid tablet is taken, dropped into beaker Q and the time taken for it to dissolve is also recorded.

Which of them will dissolve faster and why?

Select one of the following:

The powder in beaker P because the increase in surface area increases the rate at which it dissolves.
The tablet in beaker Q because the area is less and hence it will increase the rate at which it dissolves.
Both will take the same time because both the powder and the tablet are made of the same material.
It depends on the atmospheric temperature.

Explanation

Question 40 of 45

When wet turmeric powder is added to lime (chuna used with betel leaves), the turmeric turns red. What could you add to change it back to yellow?

Select one of the following:

Soap
table salt
vinegar
Detergent

Explanation

Question 41 of 45

The heart pumps blood to all the parts of the body and ensures that they receive a steady supply of oxygen and nutrients.
Which parts of the body require a constant supply of oxygenated blood to function well?
1. Lungs
2.Heart
3.Brain
4.Intestine

Select one of the following:

only 3
only 3 and 4
only 1, 3 and 4
all - 1, 2, 3 and 4

Explanation

Question 42 of 45

Sliced apples, when kept in water, take longer to turn brown than those kept outside. This is because of the enzymes, the proteins which speed up the biochemical reactions, present in an apple. Which of the following could be the reason for this?

Select one of the following:

The enzymes react with water and produce a white coating.
The enzymes do not have access to oxygen.
The enzymes cannot work at such low temperatures.
The enzymes die in the presence of water.

Explanation

Question 43 of 45

Shown below is a diagram of a weightless piston, which can slide in and out of a cylinder. (Assume that the arrangement is air tight)

The gas inside the cylinder is heated (The dots inside the cylinder represent individual gas molecules).

Which of the following will happen after a few minutes?

Select one of the following:

Explanation

Question 44 of 45

Figure P below shows a beaker of water being heated directly. However, some liquids like alcohol are heated using a water bath (figure Q). Which of these is NOT likely to be a reason for water baths to be used?

Select one of the following:

It is safer to use them with inflammable liquids.
It allows more uniform heating of the liquid.
It is a faster way of heating a liquid.
It is convenient for liquids with low boiling points.

Explanation

Question 45 of 45

Beakers P and Q both contain the same amount of water, but at 30oC and 70oC respectively.

If we could see the molecules of water in P and Q we would find that:

Select one of the following:

There is no difference in the nature of the molecules or the speed at which they are moving in the two beakers.
There is no difference in the nature of the molecules but the molecules in Q are moving faster than those in P.
Molecules in Q are moving faster than in P; and some of them have split into Hydrogen and Oxygen atoms.
The speeds of molecules in P and Q are similar, but some in Q have split into Hydrogen and Oxygen atoms.

Explanation

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	Created by simy sen almost 7 years ago

	Copied by julu john almost 5 years ago

9th grade Science Quiz on GRADE-8 ASSET MOCK TEST- 2, created by julu john on 19/01/2022.

GRADE-8 ASSET MOCK TEST- 2

GRADE-8 ASSET MOCK TEST- 2

Question 1 of 45

Select more than one correct option.

Select one or more of the following:

Explanation

Question 2 of 45

Choose the correct option.

Select one of the following:

Explanation

Question 3 of 45

Choose the correct option.

Select one of the following:

Explanation

Question 4 of 45

Select all the wrong options.

Select one or more of the following:

Explanation

Question 5 of 45

Choose the correct option.

Select one of the following:

Explanation

Question 6 of 45

Choose the correct option.

Select one of the following:

Explanation

Question 7 of 45

Select from the dropdown lists to complete the text.

Explanation

Question 8 of 45

Select all the wrong options.

Select one or more of the following:

Explanation

Question 9 of 45

If equal weights of all the three state of substance X are taken,which state will have the MAXIMUM number of molecules?

Select one or more of the following:

Explanation

Question 10 of 45

Choose the correct option.

Select one of the following:

Explanation

Question 11 of 45

Choose the correct option.

Select one of the following:

Explanation

Question 12 of 45

Our bodies are continuously growing. Small particles from the digested food are assembled to form large complex particles that make up the body material.

Select one of the following:

Explanation

Question 13 of 45

Choose the correct option.

Select one of the following:

Explanation

Question 14 of 45

Choose the correct options.

Select one or more of the following:

Explanation

Question 15 of 45

Choose the correct options.

Select one or more of the following:

Explanation

Question 16 of 45

Choose the correct option.

Select one of the following:

Explanation

Question 17 of 45

Which of these characteristics is found in all insects?

Select one of the following:

Explanation

Question 18 of 45

Which of the following would be a chemical change?

Select one or more of the following:

Explanation

Question 19 of 45

Select the correct option.

Select one of the following:

Explanation

Question 20 of 45

Select the correct option.

Varun filled some water in a plastic bottle and closed its cap tightly. He weighed the bottle and then kept it in the sun. When he weighed the bottle again after two hours he noticed some water droplets inside the bottle as shown in the figure.

What is the weight of the bottle likely to be now?

The density of ice is less than that of water. Shown here is a beaker that contains ONLY SOLID ICE. The initial level is as indicated in the figure.

If all the ice becomes water, the level will -------------------