GRADE-8 ASSET MOCK TEST- 2

Question 1

Select more than one correct option.

Accepted Answer

C

Accepted Answer

D

Accepted Answer

E

Answer

A

Answer

B

Answer

F

Question 2

Choose the correct option.

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 3

Choose the correct option.

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 4

Select all the wrong options.

Accepted Answer

A

Accepted Answer

C

Accepted Answer

D

Answer

B

Question 5

Choose the correct option.

Accepted Answer

A

Answer

B

Answer

C

Answer

D

Question 6

Choose the correct option.

Accepted Answer

A

Answer

B

Answer

C

Answer

D

Question 7

[blank_start]Deciduous[blank_end] forests have three to four  layers of plant growth. Tall deciduous trees make up the [blank_start]top[blank_end] layer and create a moderately thick forest canopy. The second layer includes trees of shorter height . The third layer includes shrubs.Forest  [blank_start]herbs[blank_end] make up the bottom-most fourth layer.

Accepted Answer

Deciduous

Accepted Answer

top

Accepted Answer

herbs

Answer

Mangroves

Answer

Coniferous

Answer

Boreal

Answer

bottom

Answer

middle

Answer

shrubs

Answer

trees

Answer

short trees

Question 8

Select all the wrong options.

Accepted Answer

A

Accepted Answer

B

Accepted Answer

D

Answer

C

Question 9

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

Accepted Answer

Solid

Accepted Answer

Gas

Accepted Answer

Liquid

Answer

Only gas and liquid

Answer

Only solid and liquid

Answer

Number of molecules will be different.

Question 10

Choose the correct option.

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 11

Choose the correct option.

Accepted Answer

C

Answer

A

Answer

B

Answer

D

Question 12

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

Accepted Answer

It occurs all the time in our bodies.

Answer

Only immediately after eating food.

Answer

Only immediately after digestion of food.

Answer

Only immediately before digestion of food.

Question 13

Choose the correct option.

Accepted Answer

C

Answer

A

Answer

B

Answer

D

Question 14

Choose the correct options.

Accepted Answer

P to Q

Accepted Answer

R to S

Answer

S to P

Answer

Q to S

Question 15

Choose  the correct  options.

Accepted Answer

Problem 1

Accepted Answer

Problem 2

Accepted Answer

Problem 4

Answer

Problem 3

Question 16

Choose the  correct option.

Accepted Answer

A

Answer

B

Answer

C

Answer

D

Question 17

Which of these characteristics is found in all insects?

Accepted Answer

external skeleton

Answer

jumping legs

Answer

2 pairs of wings

Answer

2 pairs of legs

Question 18

Which of the following would be a chemical change?

Accepted Answer

A metal gets a greenish coating on exposure to air.

Accepted Answer

A metal is slowly oxidised to produce rust.

Answer

A metal on heating to a high temperature turns in to a liquid form.

Answer

A metal is drawn in to wires.

Answer

A metal is beaten in to sheets.

Question 19

Select the correct option.

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 20

Select the correct option.

Accepted Answer

8

Answer

3

Answer

5

Answer

7

Question 21

Select all the correct options.

Accepted Answer

stable at high temperatures

Accepted Answer

electrical insulator

Answer

high lustre

Answer

highly ductile

Question 22

Diseases are caused by microorganisms. [blank_start]Malaria[blank_end] is caused by an organism that is transferred by mosquitoes.Measles are  a contagious disease caused by a [blank_start]virus[blank_end]. Common cold cannot be spread by flies.

Accepted Answer

Malaria

Accepted Answer

virus

Answer

Cholera

Answer

Chickenpox

Answer

Polio

Answer

bacteria

Answer

protozoa

Answer

fungi

Question 23

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

Accepted Answer

to helps us to eliminate waste

Accepted Answer

to regulate body temperature

Answer

to provide us with energy

Question 24

Select the correct option.

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 25

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 [blank_start]global warming[blank_end].

Accepted Answer

global warming

Question 26

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 [blank_start]cooling[blank_end] our body when the temperature is high

Accepted Answer

cooling

Question 27

Select the correct option.

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 28

Select the correct option.

Accepted Answer

C

Answer

A

Answer

B

Answer

D

Question 29

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?

Accepted Answer

only ball 1

Answer

only ball 3

Answer

both ball 1 and ball 3

Answer

cannot be sure

Question 30

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?

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

Accepted Answer

the same as before

Answer

more than before

Answer

less than before

Answer

cannot say without knowing the actual surrounding temperature.

Question 31

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

Accepted Answer

C) The metallic oxides will form bases and non-metallic oxides will form acids.

Answer

A) Both the metallic oxides and the non-metallic oxides will form acids.

Answer

B) The oxides will get dissolved in water and will not change chemically.

Answer

D) They will react with water to form respective elements and will liberate oxygen gas.

Question 32

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 ?

Accepted Answer

the milk gets free from most of the harmful bacteria.

Answer

the milk cannot be stored without spoilage for a long time

Answer

the milk gets sterilized and free from all bacteria.

Question 33

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

Accepted Answer

volume of mercury

Accepted Answer

temperature of mercury

Answer

mass of mercury

Answer

number of atoms of mercury

Question 34

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?

Accepted Answer

Cucumber

Answer

Apple

Answer

Butter

Answer

Bread

Question 35

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 -------------------

Accepted Answer

come down

Answer

go up

Answer

remain at the same place

Question 36

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?

Accepted Answer

the ability to move independently

Accepted Answer

the ability to constantly change its shape

Answer

the presence of a nuclear membrane

Question 37

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?

Accepted Answer

The boy can see only himself and the dog in mirror 1.

Accepted Answer

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

Answer

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

Answer

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.

Question 38

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?

Accepted Answer

0

Accepted Answer

3

Answer

9

Answer

7

Question 39

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?

Which of them will dissolve faster and why?

Accepted Answer

The powder in beaker P because the increase in surface area increases the rate at which it dissolves.

Answer

The tablet in beaker Q because the area is less and hence it will increase the rate at which it dissolves.

Answer

Both will take the same time because both the powder and the tablet are made of the same material.

Answer

It depends on the atmospheric temperature.

Question 40

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?

Accepted Answer

vinegar

Answer

Soap

Answer

table salt

Answer

Detergent

Question 41

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

Accepted Answer

all - 1, 2, 3 and 4

Answer

only 3

Answer

only 3 and 4

Answer

only 1, 3 and 4

Question 42

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?

Accepted Answer

The enzymes do not have access to oxygen.

Answer

The enzymes react with water and produce a white coating.

Answer

The enzymes cannot work at such low temperatures.

Answer

The enzymes die in the presence of water.

Question 43

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?

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 44

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?