NSO Level 1- Science Olympiad (SOF) Class 9: Questions 289 - 292 of 1123
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Question number: 289
Question
Which of the following statements are true about the green house effect?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Average temperatures increase world-wide due to green house effect |
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| b. | Carbon monoxide is one of the green gases |
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| c. | It increases the percentage of gases that prevent the escape of heat |
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| d. | Water vapour is one of the main greenhouse gases |
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Question number: 290
Question
Take two glasses. Fill the first glass with cold water and the second with hot water. Put one teaspoon full sugar in each glass and stir well. What will be the observation?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Sugar dissolves faster in the second glass |
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| b. | Sugar does not dissolve in both the glasses |
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| c. | Sugar dissolves faster in the first glass (picture) |
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| d. | Sugar dissolves simultaneously in both the glasses |
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Question number: 291
» Chemistry » Structure of the Atom
Question
Identify the particle from the given clue
1. Is negatively charged.
2. Present outside the nucleus of an atom.
3. Has negligible mass.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Proton |
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| b. | Electron |
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| c. | Neutron |
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| d. | All of the above |
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Question number: 292
Question
Here are some points of difference between speed and velocity. All the points are not true. Find out the in false ones
| NO. | Speed | Velocity |
| 1. | Distance covered per unit time | Displacement per unit time |
| 2. | Reduces to zero when the object is at rest | Reduces to zero when comes back to the starting point |
| 3. | Changes continuously in a uniform circular motion | Remains the same in a uniform circular motion |
| 4. | Is a scalar quantity | Is a vector quantity |
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Point 3 |
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| b. | Point 2 |
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| c. | Point 4 |
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| d. | Point 1 |
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