Question

Tick the statements that are correct-

1.
By eating rice done, we can fulfill nutritional
requirement of our body.
2. Chalk dissolve in water.
3. Separation of sugar from tea can be done with filtration.
4. Cockroach have an outer skeleton.
5. A piece of wood floats on water.​

Answer 1

Answer:

1- false

2- true

3- false

4- true

5- true

Explanation:

2. Chalk dissolve in water

4. Cockroach have an outer skeleton.

5. A piece of wood floats on water.

These statements are correct

Answer 2

Answer:

a)By eating rice done, we can fulfill nutritional

requirement of our body. ×

because our body requires all nutrients like proteins, vitamins, lipids and fat and carbohydrates. but rice is rich in carbohydrates so we can't fulfill other nutritions

b)Chalk dissolve in water ×

because chalk is insoluble - it does not dissolve in water.

c)Separation of sugar from tea can be done with filtration. ×

Since sugar is soluble in tea, it cannot be separated by filtration. Grain and husk can be separated by winnowing, not by decantation.

d)Cockroach have an outer skeleton.✓

The fore arm has two bones. Cockroaches have an outer skeleton(exoskeleton).

e)A piece of wood floats on water ✓

It floats because it weighs less than amount of water it would have to push out of the glass if it sank. Wood, cork, and ice are all less dense than water, and they float; rocks are more dense, so they sink.