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प्रश्न
Asmita went to buy an earthen pot. There she saw many things kept for sale.
What is the difference between a substance and an object?
उत्तर
Objects are made from substances. Objects have definite shape and size.
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संबंधित प्रश्न
Solids have definite shape and definite volume.
When a crystal of potassium permanganate is placed in a beaker, its purple colour spreads throughout the water. What does this observation tell us about the nature of potassium permanganate and water?
Which type of elements, metals or non-metals, show the property of brittleness ?
Name the different types of solutions. Give one example of each.
Name the process which can be used to recover salt from an aqueous salt solution.
Name the process you would use to separate a mixture of water and alcohol.
How is the impurity of iron present in several substances removed in industries ?
Differentiate between the-two characteristics of matter – ‘mass’ & ‘weight’.
Match the physical quantities given in column A to their S I units given in column B:
| (A) | (B) | ||
| (a) | Pressure | (i) | cubic metre |
| (b) | Temperature | (ii) | kilogram |
| (c) | Density | (iii) | pascal |
| (d) | Mass | (iv) | kelvin |
| (e) | Volume | (v) | kilogram per cubic metre |
Complete the following table:
| S.No. | CELSIUS | KELVIN |
| 1. | 90°C | 363 K |
| 2. | ______ | 283 K |
| 3. | 63 °C | ______ |
| 4. | 250°C | ______ |
| 5. | ______ | 303 K |
