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question_answer1)
The given picture shows that air_____.
A)
Has mass done
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B)
Occupies space done
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C)
Contains dust done
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D)
Gives shape to things done
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question_answer2)
Select the correct option regarding natural resources.
A)
They can never be exhausted. done
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B)
They are obtained from soil only. done
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C)
Non-mineral resources include air and water. done
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D)
Some of the natural resources are harmful to us. done
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question_answer3)
Three glasses P, Q and R having equal
Amount of water were taken at room temperature and equal amount of salt was added to each one of them. After that, P was cooled, Q was heated and R was left undisturbed. Water in which glass will now taste most salty?
A)
P done
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B)
Q done
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C)
R done
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D)
All will taste the same. done
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question_answer4)
In ______, we leave a mixture in a jar undisturbed for some time so that impurities get settled at the bottom and then slowly pour clear water into another jar.
A)
Filtration done
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B)
Evaporation done
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C)
Decantation done
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D)
Condensation done
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question_answer5)
Soil is formed from rocks by the process of ____ that occurs due to effects of ____, ____, etc.
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Select the option that will correctly complete the given sentence.
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A)
Erosion, temperature, wind done
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B)
Erosion, microorganisms, water done
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C)
Weathering, erosion, pollution done
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D)
Weathering, water, wind done
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question_answer6)
____ in soil is the fertile component.
A)
Gravel done
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B)
Humus done
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C)
Moisture done
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D)
Air done
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question_answer7)
Which of these natural resources is a source of lumber used for building a house?
A)
Ores done
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B)
Coal done
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C)
Trees done
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D)
Grasses done
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question_answer8)
Refer to the given figure. The rock X can be _____.
A)
Granite done
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B)
Pumice done
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C)
Marble done
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D)
Shale done
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question_answer9)
Nidhi pushed the plunger of syringe completely and dipped its needle in water.
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Then she slowly pulled the plunger while its needle was still immersed in water. Select the correct option regarding this.
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A)
Water will move in the syringe when she pushed the plunger down due to air pressure. done
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B)
When she pushed the plunger down all the air moved out creating an empty space in syringe. done
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C)
Air outside the syringe exerted pressure on water causing it to move in when the plunger is pulled up. done
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D)
Both (b) and (c) done
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question_answer10)
Which of the following statements is incorrect?
A)
Precious metals like gold and platinum are used for making jewellery. done
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B)
Dentists use powdered pumice for polishing our teeth. done
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C)
Black gold is another name of granite. done
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D)
Shale is used to make tiles and bricks. done
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question_answer11)
Study the given figure carefully. What will happen to the water level in the tub when some air is sucked out of the glass?
A)
Water level in the tub will go down. done
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B)
Water level in the tub will rise. done
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C)
Bubbles will appear in the tub. done
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D)
Water level in the tub will remain the same. done
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question_answer12)
Fossil fuels formed over a long period of time when heat and pressure were applied to
A)
Nitrogen mixed in the water done
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B)
Organisms buried in the ground done
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C)
Carbon filtered through limestone done
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D)
Bacteria on top of the mud. done
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question_answer13)
Which of these is the most accurate description of air, based on the pie-chart?
A)
Two-thirds nitrogen, two-thirds oxygen, and one-tenth other gases done
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B)
Three-quarters oxygen and one-third nitrogen and other gases done
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C)
One-half nitrogen and one-half oxygen and other gases done
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D)
One-fifth oxygen and four-fifths nitrogen and other gases done
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question_answer14)
Select the option that groups rocks of two different kinds as shown in the box.
A)
Granite : Obsidian done
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B)
Shale : Limestone done
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C)
Slate : Marble done
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D)
Conglomerate : Obsidian done
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question_answer15)
Select the correct statement out of the following.
A)
Sandy soil needs regular addition of fertilizers as it holds a large amount of water. done
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B)
Loamy soil has good qualities of both sandy and clayey soil and thus is most suitable for pottery. done
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C)
Clayey soil develops cracks in hot weather causing harm to the roots of plants, thus is not suited for agriculture. done
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D)
The water holding capacity is highest in clayey soil and lowest in loamy soil. done
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question_answer16)
Beena performed an experiment in which she took four beakers containing different amounts of water at different temperatures. She added equal amount of salt into each beaker.
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Identify the beaker in which salt takes the shortest time to dissolve.
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A)
Beaker 1 done
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B)
Beaker 2 done
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C)
Beaker 3 done
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D)
Beaker 4 done
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question_answer17)
Take a glass and fill it with water up to the brim. Make sure that there are no air bubbles. Take a thick, stiff piece of cardboard and put it over the glass. Place your hand over the card and quickly turn the glass upside down. Now slowly remove your hand.
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What does this experiment show?
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A)
Air occupies space. done
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B)
Air exerts pressure. done
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C)
Air has weight. done
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D)
All of these done
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question_answer18)
Monty fully filled a glass bottle with water, put a stopper on it and placed it upright in the freezer overnight. When he looked at it in the morning, the stopper was out of the bottle and a column of ice had emerged through the opening of the bottle.
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Which one of the following is the best explanation for what Monty had observed?
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A)
The bottle had contracted when it was put in the freezer and the water could no longer fit into it. done
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B)
Extra water condensed from the air in the freezer and then froze to form the column of ice. done
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C)
The bottle and stopper had contracted, allowing the water to pour out and form the ice column. done
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D)
The volume of water had increased when the water froze, forcing the stopper out of the bottle and forming the column of ice. done
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question_answer19)
The U-tube shown below is immersed in ice water. X and Y are the red ink droplets present inside the tube.
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What will you observe after some time?
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A)
X will move downwards and Y will move upwards. done
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B)
X will move upwards and Y will move downwards. done
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C)
X and Y will move upwards. done
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D)
X and Y will move downwards. done
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question_answer20)
The graph below shows the temperature of a beaker of water as it is subjected to various treatments.
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What could have taken place at point Q?
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A)
The beaker of water was kept on burner with full flame. done
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B)
Ice cubes were added to the beaker of water. done
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C)
A small amount of salt was added to the beaker of water. done
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D)
Some water was poured out of the beaker. done
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