Practice sheet 2 (solved) -std 6 sub -Science

PODAR INTERNATIONAL SCHOOL

Practice Sheet – 2 (2017-18)

Grade: VI

Subject: Science Answer Scheme

Duration: 1 ½ hours

1 mark questions
1.Name the disease in which a person loses the ability to see in dim light.
ans:Night blindness
(Ch 1: We need food, Pg- 7)

2.Which type of mirror is used in kaleidoscope?
ans:plain mirror
(Ch 11: The glow of light, Pg- 136)

2 mark questions
3.State the properties of synthetic fibres. (any two)
ans:• very strong and elastic
• do not absorb water well
• highly inflammable
(Ch 2: Fibres to fabrics, Pg- 17)

4.Explain the term lustre. Name any two materials that lack lustre.

ans:• A gentle sheen or soft glow possessed by a material is known as lustre.
• rubber and wood (accept any two)
(Ch 3: Grouping materials, Pg-28)

5.Convert 4 kilometres to metres.
ans:1 kilometre (km) = 1000metres
4 kilometres (km) = 4 x 1000 = 4000 metres
(Ch 10: Motion and measurement, Pg-118)

6.Which methods of separation can be used in the following situations:
a. to separate tea leaves after boiling with the help of strainer
b. to separate chaff from grains
ans:
a. filtration
b. winnowing
(Ch 4: Separating mixtures, Pg- 41, 43)

7.Distinguish between reticulate and parallel venation.( any 2 points)
ans:
Reticulate venation
Parallel venation
It is a type of arrangement of the veins of a leaf in which a central vein runs from the petiole to the tip of the leaf. The central vein then branches into small veinlets.
It is the arrangement in which the veins entering from a petiole run parallel to each other to the tip of the leaf.
Leaves of coriander, hibiscus, red gram show reticulate venation.
Leaves of grasses, maize, banana show parallel venation.
(Ch6: World of the Greens pg 67)

3 mark questions
8.What is classification? State any two advantages of grouping things together.
ans:
• Arranging different objects based on their similarities and differences are known as classification.
• Organising and grouping things together makes our life simpler.
• It is easy to find things when they are properly arranged
• Grouping various materials together makes it easy to study them.
(Ch 3: Grouping materials, pgs 26, 27)
9.
Identify the type of motions in each of the following:
a. The movement of atoms and molecules in a gas.
b. The movement of a potter’s wheel.
c. A bus moving along a straight road.
ans:
a. Random motion
b. Circular motion
c. Rectilinear motion
(Ch 10: Motion and measurement, pgs 122, 123, 124)
10.
What is reflection? State any two characteristics of an image formed in a plane mirror due to reflection.
ans:
• Reflection is a phenomenon in which light bounces off an object in the same medium.
CB/VI/1718 Practice Sheet- 2 page 3 of 5
Characteristics of the image formed:
• The image is of the same size and same colour as that of the object.
• The image formed is laterally inverted
(Ch 11: The glow of light, pgs 136, 137)
11.
Lata saw a five-year-old child with thin reddish hair, swollen feet, swollen hands, and a protruding stomach. She met the child’s parents and asked some questions about his regular diet. She advised the parents to include milk, eggs, meat, nuts and pulses in the child’s diet.
a. What is the most likely reason that the child is showing these symptoms?
b. Why did Lata advise the parents to include the mentioned food items in the child’s diet?
c. What values were shown by Lata?
ans:
a. The diet of the child contains enough carbohydrates and fats but less proteins.
b. The food items suggested by Lata are rich in proteins.
c. Caring, knowledge and awareness.
(Ch 1: We need food, pg 6)
5 mark questions
12.
a.
Give an example of the following:
i. A gas-gas mixture
ii. A liquid-gas mixture
iii. A solid-gas mixture
ans:
i. Air
ii. Soda water
iii. Sponge
(accept all correct examples)
(Ch 4: Separating mixtures, pg 37)
b.
How will you separate small stones and pebbles from sand?
ans:
• Small stones and pebbles can be separated from sand by sieving.
• The sand will pass through the sieve and the small stones and pebbles being larger in size will not pass through.
(Ch 4: Separating mixtures, pg 41)
CB/VI/1718 Practice Sheet- 2 page 4 of 5
13.
Observe the diagram shown below and answer the questions that follow:
a.
Identify the process represented by the image given.
Define the process.
ans:
• Photosynthesis
• The process by which green plants make sugars by using carbon dioxide from the air, water from the soil and light energy from the sun.
b.
Which gases are represented by the letters a and b?
ans:
a: carbon dioxide
b: oxygen
c.
Write the chemical equation of the process.
ans:
carbon dioxide + water sugar + oxygen
(Ch 6: World of the Greens Pg- 68)
2 mark questions (Practical skill based questions)
14.
A student takes a mixture of salt and water in a pot. He heats the pot on a low flame for some time till all the water is converted to steam. He observes some residue in the pot.
Identify the residue left in the pot.
Name the process involved in the separation of the solute from the solution.
ans:
• Salt
• Evaporation
(Ch 4: Separating Materials, Pg- 43)
Sunlight
Chlorophyll
CB/VI/1718 Practice Sheet- 2 page 5 of 5
15.
Anu observed some roots that provided support to the plant growing from the stem of a plant.
What plant did she observe? What are these roots called?
ans:
• maize
• aerial roots
(Ch 6: World of the Greens Pg- 65)
16.
A student held a red coloured toy between a lighted candle and the wall in a dark room.
State any two characteristics of the shadow of the toy as observed by the student.
ans:
• The colour of the shadow is black.
• The shadow does not show any details of the object.
(Ch 11: The glow of light, Pg- 132)
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