| 1. | MAC OS | Free and Open-source Software |
| 2. | Software | Paid and Proprietary Software |
| 3. | Hardware | Input Device |
| 4. | Keyboard | RAM |
| 5. | LINUX | Geogebra |
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| 1. 1000 gm | a) | 1 kilo meter |
| 2. 1000 milligram | b) | 1 ton |
| 3. 1000 kilogram | c) | 1 gram |
| 4. 1000 metre | d) | 1 kilogram |
| 1. | Flood | Lake |
| 2. | Surface water | Evaporation |
| 3. | Sunlight | Water vapour |
| 4. | Cloud | Pole |
| 5. | Frozen water | Increased rainfall |
| 1. | Length of the fore arm | metre |
| 2. | SI unit of length | second |
| 3. | Nano | $10^3$ |
| 4. | SI Unit of time | $10^{-9}$ |
| 5. | Kilo | Cubit |
| First-generation computer | Artificial Intelligence |
| Second-generation computer | Integrated Circuit |
| Third generation computer | Vacuum tubes |
| Fourth-generation computer | Transistor |
| Fifth-generation computer | Micro processor |
| 1. | Mountain | Monocot |
| 2. | Desert | Branches |
| 3. | Stem | Dry place |
| 4. | Photosynthesis | Himalayas |
| 5. | Fibrous root | Leaves |
| 1. | Moving Air | Photosynthesis |
| 2. | Layer in which we live | Troposphere |
| 3. | Stratosphere | Wind |
| 4. | Oxygen | Ozone layer |
| 5. | carbon-di-oxide | Combustion |
| 1. | Vitamin A | a. Rickets |
| 2. | Vitamin B | b. Night blindness |
| 3. | Vitamin C | c. Sterility |
| 4. | Vitamin D | d. Beri beri |
| 5. | Vitamin E | e. Scurvy |
| 1. |  |
a. Circular motion |
| 2. |  |
b. Oscillatory motion |
| 3. |  |
c. Linear motion |
| 4. |  |
d. Rotatory motion |
| 5. |  |
e. Linear and rotatory motion |