Class 6 Science - Chapter Air Around Us NCERT Solutions | How will you prove that air supports bur

How do plants and animals help each other in the exchange of gases in the atmosphere?

List five activities that are possible due to the presence of air.

The layer of air around the earth is known as ___________.

How will you show that air is dissolved in water?

What is the composition of air?

Why does a lump of cotton wool shrink in water?

The component of air used by green plants to make their food, is ___________.

Which gas in the atmosphere is essential for respiration?

(a) Which kind of garbage is not converted into compost by the redworms?
(b) Have you seen any other organism besides redworms, in your pit? If yes, try to find out their names. Draw pictures of these.

Rearrange the boxes given below to make a sentence that helps us understand opaque objects.

To walk through a waterlogged area, you usually shorten the length of your dress by folding it. Can this change be reversed?

Do you find that all living beings need the same kind of food?

Name the major nutrients in our food.

Classify the following fibres as natural or synthetic:
nylon, wool, cotton, silk, polyester, jute

Name five objects which can be made from wood.

Why do we need to separate different components of a mixture? Give two examples.

Correct the following statements and rewrite them in your notebook.
(a) Stem absorbs water and minerals from the soil.
(b) Leaves hold the plant upright.
(c) Roots conduct water to the leaves.
(d) The number of petals and sepals in a flower is always equal.
(e) If the sepals of a flower are joined together, its petals are also joined together.
(f) If the petals of a flower are joined together, then the pistil is joined to the petal.

Fill in the blanks:
(a) Joints of the bones help in the ——————— of the body.
(b) A combination of bones and cartilages forms the _______ of the body.
(c) The bones at the elbow are joined by a ______________________ joint.
(d) The contraction of the _____________ pulls the bones during movement.

Name two flowers, each with joined and separated sepals.

Name the following:
(a) The nutrients which mainly give energy to our body.
(b) The nutrients that are needed for the growth and maintenance of our body.
(c) A vitamin required for maintaining good eyesight.
(d) A mineral that is required for keeping our bones healthy.

A magnet was brought from different directions towards a toy boat that has been floating in water in a tub. Affect observed in each case is stated in Column I. Possible reasons for the observed affects are mentioned in Column II. Match the statements given in Column I with those in Column II.

Column I                                                                        Column II

Boat gets attracted towards the magnet                          Boat is fitted with a magnet with north pole towards its head

Boat is not affected by the magnet                                   Boat is fitted with a magnet with south pole towards its head

Boat moves towards the magnet if north                          Boat has a small magnet fixed along its length
pole of the magnet is brought near its
head

Boat moves away from the magnet                                  Boat is made of magnetic material                                                                                                             when north pole is brought near its head 

Boat floats without changing its direction                         Boat is made up non-magnetic material

How will you separate sand and water from their mixture?

When does a drought occur?

Match the items in Column I with one or more items of Column II.

Column I                           Column II
Upper jaw                          have fins on the body
Fish                                    has an outer skeleton
Ribs                                   can fly in the air
Snail                                  is an immovable joint
Cockroach                         protect the heart
                                          shows very slow movement
                                          have a streamlined body

Write the similarities and differences between the motion of a bicycle and a ceiling fan that has been switched on.

Draw (a) a leaf, (b) a taproot and (c) a flower, you have studied for Table 7.3.

Given below are the names of some objects and materials:
Water, basket ball, orange, sugar, globe, apple and earthen pitcher Group them as:
(a) Round shaped and other shapes
(b) Eatables and non eatables

A drawing sheet changes when you draw a picture on it. Can you reverse this change?