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Plastic shows ______ property, hence it can be moulded to any shape.
Concept: undefined >> undefined
Motor cars are coated with ____________.
Concept: undefined >> undefined
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Who is my partner?
| 'A' column | 'B' column |
| a. Lead glass | i. Plates |
| b. Bakelite | ii. Mattresses |
| c. Thermocol | iii. Electric bulb |
| d. Optic glass | iv. Electric switch |
| e. Polypropylene | v. Lens |
Concept: undefined >> undefined
Write the natural or manmade raw material of the following items.
Mattress, glass vessel, bangle, chair, gunny bag, broom, knife, pen.
Concept: undefined >> undefined
How the plastic is produced?
Concept: undefined >> undefined
Distinguish between.
Man made material and natural material.
Concept: undefined >> undefined
Distinguish between
Thermoplastic and thermosetting plastic.
Concept: undefined >> undefined
Explain the effect of following materials on environment and human health.
1. Plastic
2. Glass
3.Thermocol.
Concept: undefined >> undefined
Which measures will you arrange to minimize the environmental problems arising due to non-degradable plastic?
Concept: undefined >> undefined
Write short note.
Glass production.
Concept: undefined >> undefined
Write short note.
Uses of plastic.
Concept: undefined >> undefined
Why is it better to avoid the use of plastic products?
Concept: undefined >> undefined
Write proper word from the following group of words in the blank.
(magnetism, 4.5V, 3.0V, gravitational attraction, potential difference, potential, higher, lower, 0V)
Water in the waterfall flows from a higher level to the lower level because of ______.
Concept: undefined >> undefined
The differences between the electrostatic potential of the positive end the negative end of an electric cell is the ______ of the cell.
Concept: undefined >> undefined
Three electric cells of potential difference 1.5 V each have been connected as a battery. The potential differences of the battery will be ____________ V.
Concept: undefined >> undefined
Electric cells having 2V potential difference each have been connected in the form of a battery. What will be the total potential difference of the battery in both cases?
Concept: undefined >> undefined
The masses of other stars are measured relative to the mass of the ______.
Concept: undefined >> undefined
If you are the sun, write about your properties in your own words.
Concept: undefined >> undefined
Air, water, minerals, soil are ___________ factors of an ecosystem.
Concept: undefined >> undefined


