State whether the following statements are true or false
(i) A cylindrical magnet has only one pole.
(ii) Artificial magnets were discovered in Greece.
(iii) Similar poles of a magnet repel each other.
(iv) Maximum iron filings stick in the middle of a bar magnet when it is brought near them.
(v) Bar magnets always point towards North-South direction.
(vi) A compass can be used to find East-West direction at any place.
(vii) Rubber is a magnetic material.
(i) False This statement is incorrect because magnet always contains two poles: north and south.
(ii) False Artificial magnets are man- made.
(iii) True Yes, it is so because opposite poles attracts each other and similar poles repel each other.
(iv) False It is false because iron attracts towards the poles of magnet. So maximum iron fillings sticks at the poles of the magnet when it is brought near them.
(v) True Magnet has two poles. That’s why it always point towards 2 direction North and south.
(vi) True Yes, it is so because compass shows two directions: North and South. So, by knowing these two directions one can easily find out east west directions.
(vii) False Rubber is a non- magnetic material. It is not attracted towards magnet.
Draw (a) a leaf, (b) a taproot and (c) a flower, you have studied for Table 7.3.
You are given an iron strip. How will you make it into a magnet?
Name two foods each rich in:
(a) Fats
(b) Starch
(c) Dietary fibre
(d) Protein
A thick coating of a paste of Plaster of Paris (POP) is applied over the bandage on a fractured bone. It becomes hard on drying to keep the fractured bone immobilised. Can the change in POP be reversed?
Tick (√) the statements that are correct.
(a) By eating rice alone, we can fulfill nutritional requirement of our body. ( )
(b) Deficiency diseases can be prevented by eating a balanced diet. ( )
(c) Balanced diet for the body should contain a variety of food items. ( )
(d) Meat alone is sufficient to provide all nutrients to the body. ( )
List all items known to you that float on water. Check and see if they will float on an oil or kerosene.
Name the part of the plant which produces its food. Name this process.
Why can a pace or a footstep not be used as a standard unit of length?
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
Name two items that are made from coconut fibre.
A drawing sheet changes when you draw a picture on it. Can you reverse this change?
Fill in the blanks:
a) Plant fibres are obtained from_________ and ________ .
b) Animals fibres are __________ and ___________ .
What is a habitat?
Name two items that are made from coconut fibre.
You are given an iron strip. How will you make it into a magnet?
In which part of a flower, you are likely to find the ovary?
Where are poles of a bar magnet located?
Arrange the following lengths in their increasing magnitude:
1 metre, 1 centimetre, 1 kilometre,1 millimetre.
Which of the following plants have you seen? of those that you have seen, which one have flowers?
Grass, maize, wheat, chilli, tomato, tulsi, pipal, shisham, banyan, mango, jamun, guava, pomegranate, papaya, banana, lemon, sugarcane, potato, groundnut
Rearrange the boxes given below to make a sentence that helps us understand opaque objects.