Question
While a mechanic was repairing a gadget using a screwdriver, the steel screws kept falling down. Suggest a way to solve the problem of the mechanic on the basis of what you have learnt in this chapter.
✓
Answer
To solve the problem of steel screws falling down while using a screwdriver, mechanic can magnetize the screwdriver. This way, the screwdriver will attract and hold the screws, preventing them from falling.
How to magnetize the screwdriver? (Refer to text 4.5, making your own magnet).
How to magnetize the screwdriver? (Refer to text 4.5, making your own magnet).
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Read the items of food listed below. Classify them into carbohydrate rich, protein rich and fat rich foods.
Moong dal, fish, mustard oil, sweet potato, milk, rice, egg, beans, butter, buttermilk (chhachh), cottage cheese (paneer), peas, maize, white bread
Moong dal, fish, mustard oil, sweet potato, milk, rice, egg, beans, butter, buttermilk (chhachh), cottage cheese (paneer), peas, maize, white bread
Mention the methods that can be used for the separation of the following mixtures:
- Wheat, sugar and husk
- Rice, gram and iron fillings
- Sand, Mack gram (urad) and husk.
Draw a labelled diagram to show different parts of pistil.
Where do bees store honey?
Water kept in sunlight gets heat from sun and is evaporated. But how does water kept under the shade of a tree also gets evaporated? Explain.
Match the events related to motion in Column $I$ with the types of motions given in Column $II$.
→|
S.No.
|
COLUMN $I$
|
S.No.
|
COLUMN $II$
|
|
$A.$
|
A moving wheel of a $(i)$ Sewing machine.
|
$i.$
|
Circular motion.
|
|
$B.$
|
Movement of tip of the minute hand of a clock in one hour.
|
$ii.$
|
Rotational motion.
|
|
$C.$
|
A moving swing.
|
$iii.$
|
Periodic motion.
|
Write the features of desert plants.
A list of words is given in a box. Use appropriate words to fill up the blanks in the following statements
Air, oxygen, wind, water vapour, mixture, combination, direction, road, bottles, cylinders.
Air, oxygen, wind, water vapour, mixture, combination, direction, road, bottles, cylinders.
- The makes the windmill rotate.
- Air is a of some gases.
- A weather cock shows the in which the air is moving at that place.
- Mountaineers carry oxygen with them, while climbing high mountains.
Most of the water that falls on the land as rain and snow, sooner or later goes back to a sea or an ocean. Explain how it happens?
Fill up the blanks using the following terms— [fossil fuels, forest, air, petroleum, coal, water and non-renewable resource)
