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Why is e-waste harmful? Express your opinion about this.
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Using a spreadsheet, draw graphs between distance and time, using the information about the movements of Amar, Akbar and Anthony given in the table below in the lesson on the Laws of Motion. What precautions will you take while drawing the graph?
| Time in the clock | Distance covered by Amar in km. |
Distance covered by Akbar in km. |
Distance covered by Anthony in km. |
| 5.00 | 0 | 0 | 0 |
| 5.30 | 20 | 18 | 14 |
| 6.00 | 40 | 36 | 28 |
| 6.30 | 60 | 42 | 42 |
| 7.00 | 80 | 70 | 56 |
| 7.30 | 100 | 95 | 70 |
| 8.00 | 120 | 120 | 84 |
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Fill in the blank to complete the statement. Justify the statement.
To draw graphs based on the quantitative information obtained in an experiment, one uses ______.
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Answer the following question in your own words.
Explain the structure, function and types of RNA.
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Give examples of salts with water of crystallization, and their uses.
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What are the different types of coal?
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Explain the following.
Petrol, diesel, and coal are fossil fuels.
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Why are the mirrors fitted on the outside of cars convex?
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In an electric circuit, electron flow a from of point of ______ potential to the point of ______ potential.
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A battery is to be formed by joining 3 dry cells with connecting wires. Show how will you connect the wires by drawing a diagram.
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In an electric circuit, a battery and a bulb have been connected and the battery consists of two cells of equal potential difference. If the bulb is not glowing, then which tests will you perform in order to find out the reason for the bulb not glowing?
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Which type of mirror is used in the following?
Street lights
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What are the uses of coal?
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Write the name of the following compound and deduce its molecular mass.
Na2SO4
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Explain the following cycle in your own words with a suitable diagram.
Oxygen cycle.
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Using information communication technology, prepare powerpoint presentations on at least three topics in your textbook. Make a flowchart of the steps you used while making these presentations.
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Fill in the blank to complete the statement. Justify the statement.
While presenting pictures and videos about the works of scientists, we can use ______.
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Draw and label the diagram.
Nephron
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Draw and label the diagram.
Human excretory system
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Write a short note.
Meristematic tissue
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