Substances

Q.

Question 6

List all items known to you that float on water. Check and see if they will float on an oil or kerosene.

Q.

__________ is the cheapest natural fibre

Q. Plastic is a natural substance.

1. True
2. False

Q. Ramesh has a glass of lemonade that he made using lemon juice, water, sugar and a bit of salt. Explain how these components mixed together to form the lemonade.

Q.

Does chalk powder float on water?

Q. Which among the following is not a transparent substance?

1. Glass
2. Wood
3. Clean water
4. Air

Q.

Glass is a transparent object.

1. True
2. False

Q.

The kind of glass is used for making glass apparatus and cooking utencils?

Q.

Which among the following substances is insoluble in water?

1. Vinegar
2. Sugar
3. Sawdust
4. Salt

Q.

Question 5

Name two items that are made from coconut fibre

Q. Which of the following material forms a shadow when light falls on it?

1. Cloth
2. Tracing paper
3. Wooden block
4. Glass

Q.

13. Are the cotton and jute obtained from animals?

Q. is insoluble in water.

1. Lemon juice
2. Sugar
3. Sawdust
4. Salt

Q.

By which property, steel and sponge are different from each other?

Q.

One fine day John was cleaning utensils. He found that the sponge used for cleaning utensils can be compressed easily but the utensils cannot be compressed. He grouped utensils and sponge into two groups. On the basis of which of the following properties, can the utensils and sponge be sorted?

1. Transparency

2. Hardness

3. Solubility

4. Appearance

Q.

The substance that dissolves in water is called the ____

Q.

Give one example each of the following combinations of properties. [5 MARKS]

1.	Lustrous and Hard
2.	Soluble and Opaque
3.	Translucent and Soft
4.	Insoluble and Floating
5.	Sinking and Transparent

Q. Select the odd one out, based on their usage.

1. Gold
2. Silver
3. Cotton
4. Diamond

Q.

Among all the given options which of the following is the softest?

1. Stone

2. Rubber

3. Sponge

4. Wood

Q. Pick the correct pair based on the nature of transparency of the objects.

1. Transparent: glass, opaque: wood
2. Transparent: paper, opaque: cloth
3. Transparent: cardboard, opaque: iron sheet
4. Transparent: plastic, opaque: glass

Q.

Given below are the names of some objects and materials.​

Water, basketball, orange, sugar, globe, apple and earthen pitcher. Group them as:​

1. Round-shaped and other-shaped​

2. Eatables and non eatables ​
   

Q. is insoluble in water.

1. Lemon juice
2. Sugar
3. Sawdust
4. Salt

Q. Needles are used in knitting sweaters.

1. True
2. False

Q.

Explain an activity to understand the characteristics of solids.

Q. How do we classify materials based on their hardness? Explain.

Q. Iron rod is harder than sponge.

1. True
2. False

Q. Oil floats on water.

1. True
2. False

Q.

Nishant wants to present his friend a gift made of plant fibre. What should he choose as the gift?

Q. Lustre is the ability of a material to shine.

1. True
2. False

Q. A leaf on water while a coin in it.

1. dissolves
2. sinks
3. floats
4. dissapears