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State whether true or false. If false, correct the statement.
During digestion, proteins are broken down into amino acids.
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Describe the alimentary canal of man
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Why is it impossible for all farmers to construct farm ponds in their fields?
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What is the vision of IUCN?
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H1N1 virus causes ______.
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Assertion: Chicken pox is a disease indicated by scars and marks in the body.
Reason: Chicken pox causes rashes on face and further spreads throughout the body.
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Differentiate the following.
Shrimp and Prawn
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State three uses of ultrasonic vibrations.
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To find out the relative density of the substance, with respect to the density of water ______C is taken.
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The density Bottle is also called ______.
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Describe the construction and working of the Pycnometer.
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Assertion: The mirrors used in torch lights are parabolic, not concave.
Reason: The image formed by a concave mirror is always virtual.
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Assertion: The nature of the image depends on the size of the mirror.
Reason: Small mirrors always form a virtual image.
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Which kind of mirrors are used in the shaving mirror? Why?
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Which mirror is used as a reflector? Why?
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Match the following:
| Column I | Column II | ||
| 1. | A plane mirror | a. | The image is erect & smaller in size than the object. |
| 2. | A concave mirror | b. | The image is erect & of the same size as the object. |
| 3. | A convex | c. | Used by dentists to see an enlarged image of teeth. |
| d. | Can form images of objects spread over a large area. |
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Match the following:
| Column I | Column II | ||
| 1. | plane mirror | a. | Focal length is positive. |
| 2. | concave | b. | The focal length is negative. |
| 3. | convex | c. | The focal length is infinity. |
| 4. | Real image | d. | Magnification if positive value. |
| 5. | Virtual image | e. | Magnification if negative value. |
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