State whether the following statements are true or false:
a) Yarn is made from fibres.
b) Spinning is a process of making fibres.
c) Jute is the outer covering of coconut.
d) The process of removing seed from cotton is called ginning.
e) Weaving of yarn makes a piece of fabric.
f) Silk fibre is obtained from the stem of a plant.
g) Polyester is a natural fibre.
(a) True
This statement is true because as we know that the process of making yarn from the fibre is called spinning.
(b) False
Because, spinning is the process of making yarn from fibre.
(c) False
This statement is false because the outer covering of coconut is called coir.
(d) True
This statement is true because the re-cleaning or removing of seeds from the cotton balls is known as ginning.
(e) True
This statement is true because weaving is the process of arranging the two sets of yarn together to make a fabric.
(f) False
It is false because silk fibre is obtained from the cocoon.
(g) False
Polyester is derived from the coal and petroleum. It is a synthetic fibre.
Name two items that are made from coconut fibre.
Fill in the blanks:
a) Plant fibres are obtained from_________ and ________ .
b) Animals fibres are __________ and ___________ .
From which parts of the plant cotton and jute are obtained?
Classify the following fibres as natural or synthetic:
nylon, wool, cotton, silk, polyester, jute
Explain the process of making yarn from fibre.
(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.
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.
What is a habitat?
Which gas in the atmosphere is essential for respiration?
Find the odd one out from the following:
a) Chair, Bed, Table, Baby, Cupboard
b) Rose, Jasmine, Boat, Marigold, Lotus
c) Aluminium, Iron, Copper, Silver, Sand
d) Sugar, Salt, Sand, Copper sulphate
Fill in the blanks in the following
(i) Artificial magnets are made in different shapes such as __________, __________ and ____________.
(ii) The Materials which are attracted towards a magnet are called________.
(iii) Paper is not a ______ material.
(iv) In olden days, sailors used to find direction by suspending a piece of ___________.
(v) A magnet always has __________ poles.
List five activities that are possible due to the presence of air.
How will you show that air is dissolved in water?
(a) What do you do with the left over food at home?
(b) If you and your friends are given the choice of eating in a plastic plate or a banana leaf platter at a party, which one would you prefer and why?
What is a habitat?
Why does a lump of cotton wool shrink in water?
The layer of air around the earth is known as ___________.
What is winnowing? Where is it used?