VI SC SP2

KENDRIYA VIDYALAYA STEEL PLANT - CLASS VI SCIENCE SAMPLE PAPER

Time: 1.5 Hours | Total Marks: 40

SECTION A: Multiple Choice Questions (10 x 1 = 10 Marks)

1. How many centimetres are there in 1 metre?

a) 10   b) 100   c) 1000   d) 0.1

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Answer: b) 100

2. If an object repeats its path after a fixed interval of time, the motion is:

a) Linear   b) Periodic   c) Non-periodic   d) Rectilinear

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Answer: b) Periodic

3. Materials through which things can be seen but not clearly are:

a) Transparent   b) Translucent   c) Opaque   d) Lustrous

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Answer: b) Translucent

4. What is the SI unit of mass?

a) Gram   b) Kilogram   c) Litre   d) Millilitre

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Answer: b) Kilogram

5. Which of these thermometers should be washed with soap and water before use?

a) Laboratory   b) Clinical   c) Infrared   d) Room

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Answer: b) Clinical

6. The process of conversion of solid state into liquid state is called:

a) Freezing   b) Evaporation   c) Melting   d) Condensation

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Answer: c) Melting

7. Winnowing is used to separate components based on differences in:

a) Size   b) Weight (Heavier/Lighter)   c) Colour   d) Magnetic property

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Answer: b) Weight (Heavier/Lighter)

8. Which gas is soluble in water and essential for aquatic life?

a) Nitrogen   b) Oxygen   c) Carbon Dioxide   d) Argon

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Answer: b) Oxygen

9. A 37.0 °C reading on the Celsius scale is equal to what in Fahrenheit?

a) 98.4 °F   b) 98.6 °F   c) 101 °F   d) 32 °F

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Answer: b) 98.6 °F

10. Magnetic separation can be used to remove:

a) Husk from grain   b) Iron nails from sawdust   c) Salt from water   d) Sand from pebbles

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Answer: b) Iron nails from sawdust

SECTION B: Match the Following (4 x 1 = 4 Marks)

Match the mixtures in Column I with their methods of separation in Column II:
1. Gram flour mixed with black gram --- (i) Filtration
2. Chalk powder mixed with water --- (ii) Magnetic separation
3. Iron powder mixed with sawdust --- (iii) Decantation
4. Oil mixed with water --- (iv) Sieving

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1-iv (Sieving), 2-i (Filtration), 3-ii (Magnetic separation), 4-iii (Decantation)

SECTION C: Short Answer Questions (5 x 2 = 10 Marks)

1. List two precautions for using a laboratory thermometer.

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Handle with care as it can break if it hits a hard object.
Do not hold the thermometer by the bulb while taking a reading.

2. Define volume and name its SI related unit for large quantities.

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Volume is the space occupied by matter.
The SI unit for volume is the cubic metre (m³).

3. Explain the term "translucent" with an example.

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Translucent materials are those through which objects can be seen, but not clearly.
Examples include butter paper or frosted glass.

4. What is sieving and where is it used?

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Sieving is a method to separate components of a solid-solid mixture that have different sizes.
It is used to separate bran from flour or pebbles from sand at construction sites.

5. Define melting and freezing.

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Melting is the process of conversion of a solid into a liquid state.
Freezing is the process of conversion of a liquid into a solid state.

SECTION D: Long Answer Questions (2 x 4 = 8 Marks)

1. Compare the properties of the three states of water (Solid, Liquid, Gas).

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Solid (Ice) has a fixed shape, does not flow, and does not spread.
Liquid (Water) has no fixed shape, flows easily, and takes the container's shape.
Gas (Water Vapour) has no fixed shape and spreads to fill all available space.
All three states are forms of the same substance and can change via heating or cooling.

2. Describe the conditions that affect the rate of evaporation.

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Exposed Surface Area: Evaporation is faster when the area exposed to air is larger.
Temperature: Water evaporates faster on a hot sunny day than on a cold day.
Wind/Air Movement: Evaporation increases with air movement, which is why clothes dry faster when it's windy.
Humidity: High humidity in the air (like on rainy days) makes evaporation slower.

SECTION E: Case Based Questions (2 x 4 = 8 Marks)

Case 1: Anish and his parents fixed string lights on the arches of their verandah for a celebration. He needed to measure the total length of the curved arches to buy enough lights.

Q1. Can Anish use a metal metre rod to measure the curved arch directly? (1M)
Q2. What flexible tool could he use instead? (1M)
Q3. Describe a method using a thread to measure this curved line. (2M)

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A1: No. A2: Flexible measuring tape or tailor's tape.
A3: Place a thread along the curve, mark the start and end points, then straighten the thread and measure it with a scale.

Case 2: While traveling to Bhopal, Malli saw a painting in a dhaba showing a lady using a wooden churner in a pot of curd to get butter. The shopkeeper said this was an ancient practice.

Q1. What is the name of this separation method? (1M)
Q2. Why does butter come to the top? (1M)
Q3. Name a modern kitchen appliance that performs this task. (2M)

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A1: Churning. A2: Butter is lighter than the buttermilk and floats at the top.
A3: An electric mixer, blender, or food processor is commonly used today.

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