Please select a subject first
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A man painted his main gate made up of iron, to
- prevent it from rusting.
- protect it from sun.
- make it look beautiful.
- make it dust free.
Which of the above statement(s) is/are correct?
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Iron pillar near the Qutub Minar in Delhi is famous for the following facts. Which of these facts is responsible for its long stability?
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Galvanisation is a process used to prevent the rusting of which of the following?
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State whether the following statement is true or false:
Ships suffer a lot of damage though they are painted.
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Explain the following:
Lime water turns milky on passing carbon dioxide gas into it.
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Explain the following:
Bubbles are produced when acetic acid is added to a solution of sodium hydrogencarbonate.
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Give an example of a chemical reaction for the following situation:
Sound is produced
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Following are precautions one must take in case a storm is accompanied by lightning.
- Do not take shelter under a tree.
- Do not take shelter under an umbrella with a metallic end.
- Do not take shelter in open garages, storage sheds, etc.
- Do not take shelter in a bus in the open.
Which one of these is not correct?
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Air around us exerts ______.
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The moving air is called ______.
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State whether the following statement is True or False:
Warm air is lighter than cool air.
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To expel hot air out of the kitchen, ‘A’ has an exhaust fan fitted on the window of her kitchen and ‘B’ has a similar exhaust fan fitted on the wall near the ceiling of her kitchen. Which of the exhaust fan will expel the hot air more effectively? Explain why?
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Match Column I with Column II. There can be more than one match.
| Column I | Column II | ||
| (a) | on heating air | (i) | descends |
| (b) | on cooling air | (ii) | expands |
| (iii) | contracts | ||
| (iv) | rises | ||
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Describe an activity to demonstrate that warm air is lighter than cool air
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The picture in figure shows tree line along the sea coast on an island near the equator. As shown, the tree tops are permanently bent in one direction. Are the trees bent towards the sea or away from it? Explain.
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Read the following statement and give the appropriate terms for them.
Removal of top soil during heavy rains or strong winds
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Unscramble the following words:
TBTAYER
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Draw the symbols of the following circuit components.
Battery
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Which of the following can be used to form a real image?
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