GRADE-8 ASSET MOCK TEST- 2

Question 1

Question

Select more than one correct option.

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Capture 3 (binary/octet-stream)

Answer

Question 2

Question

Choose the correct option.

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Img 8557 (binary/octet-stream)

Answer

Question 3

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Choose the correct option.

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Capture 6 (binary/octet-stream)

Answer

Question 4

Question

Select all the wrong options.

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Img 8559 (binary/octet-stream)

Answer

Question 5

Question

Choose the correct option.

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Img 8560 (binary/octet-stream)

Answer

Question 6

Question

Choose the correct option.

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Capture 7 (binary/octet-stream)

Answer

Question 7

Question

[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.

Answer

Mangroves
Coniferous
Boreal
Deciduous
top
bottom
middle
shrubs
herbs
trees
short trees

Question 8

Question

Select all the wrong options.

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Capture 8 (binary/octet-stream)

Answer

Question 9

Question

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

Answer

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

Question 10

Question

Choose the correct option.

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Capture8 (binary/octet-stream)

Answer

Question 11

Question

Choose the correct option.

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Capture 9 (binary/octet-stream)

Answer

Question 12

Question

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

Answer

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.

Question 13

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Choose the correct option.

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Capture 10 (binary/octet-stream)

Answer

Question 14

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Choose the correct options.

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Answer

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

Question 15

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Choose the correct options.

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Answer

Problem 1
Problem 2
Problem 3
Problem 4

Question 16

Question

Choose the correct option.

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Capture 13 (binary/octet-stream)

Answer

Question 17

Question

Which of these characteristics is found in all insects?

Answer

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

Question 18

Question

Which of the following would be a chemical change?

Answer

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.

Question 19

Question

Select the correct option.

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Img 8570 (binary/octet-stream)

Answer

Question 20

Question

Select the correct option.

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Answer

Question 21

Question

Select all the correct options.

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Answer

high lustre
stable at high temperatures
highly ductile
electrical insulator

Question 22

Question

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.

Answer

Malaria
Cholera
Chickenpox
Polio
bacteria
virus
protozoa
fungi

Question 23

Question

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

Answer

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

Question 24

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Select the correct option.

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Answer

Question 25

Question

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].

Answer

global warming

Question 26

Question

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

Answer

cooling

Question 27

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Select the correct option.

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Img 8574 (binary/octet-stream)

Answer

Question 28

Question

Select the correct option.

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Capture 17 (binary/octet-stream)

Answer

Question 29

Question

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?

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Ball (binary/octet-stream)

Answer

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

Question 30

Question

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?

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Bottle+1 (binary/octet-stream)

Answer

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

Question 31

Question

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

Answer

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.

Question 32

Question

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 ?

Answer

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.

Question 33

Question

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

Answer

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

Question 34

Question

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?

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Butter (binary/octet-stream)

Answer

Cucumber
Apple
Butter
Bread

Question 35

Question

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

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Water (binary/octet-stream)

Answer

go up
come down
remain at the same place

Question 36

Question

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?

Answer

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

Question 37

Question

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?

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Mirror (binary/octet-stream)

Answer

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.

Question 38

Question

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?

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Capture (binary/octet-stream)

Answer

Question 39

Question

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?

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Antacid (binary/octet-stream)

Answer

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.

Question 40

Question

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?

Answer

Soap
table salt
vinegar
Detergent

Question 41

Question

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

Answer

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

Question 42

Question

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?

Answer

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.

Question 43

Question

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?

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Piston (binary/octet-stream)

Answer

Question 44

Question

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?

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Beaker (binary/octet-stream)

Answer

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.

Question 45

Question

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:

Image:

B Eaker+1 (binary/octet-stream)

Answer

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.

	Created by simy sen over 4 years ago

	Copied by julu john over 2 years ago

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GRADE-8 ASSET MOCK TEST- 2

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Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Question 10

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

Question 19

Question 20

Question 21

Question 22

Question 23

Question 24

Question 25

Question 26

Question 27

Question 28

Question 29

Question 30

Question 31

Question 32

Question 33

Question 34

Question 35

Question 36

Question 37

Question 38

Question 39

Question 40

Question 41

Question 42

Question 43

Question 44

Question 45

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