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The alloys called ______ and ______ are used for making industrial magnets.
Concept: undefined >> undefined
The real test of a magnet is ______.
Concept: undefined >> undefined
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With whom should I pair up?
| Group 'A' | Group 'B' |
| (a) Compass | 1. The highest magnetic force |
| (b) The door of a cupboard | 2. Like poles |
| (c) Repulsion | 3. A magnet |
| (d) Magnetic pole | 4. A magnetic needle |
Concept: undefined >> undefined
Distinguish between the two methods of making artificial magnets.
Concept: undefined >> undefined
Sound is generated by the rhythmic ______ of an object.
Concept: undefined >> undefined
A medium is necessary for ______ of sound.
Concept: undefined >> undefined
Match the pairs.
| Group ‘A’ | Group ‘B’ |
| (a) Flute | (1) Frequency less than 20 Hz |
| (b) Frequency | (2) Frequency more than 20000 Hz |
| (c) Sound level | (3) Vibrations in the air |
| (d) Ultrasonic sound | (4) Measured in Hz |
| (e) Infrasonic sound | (5) Decibel |
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Give a scientific reason.
If you were both on the moon, your friend will not be able to hear you call.
Concept: undefined >> undefined
How is the sound produced?
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Describe natural resources with reference to the following:
Mineral resources
Concept: undefined >> undefined
Describe natural resources with reference to the following:
Forest resources
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Describe natural resources with reference to the following:
Ocean resources
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What steps taken for the protection and conservation of natural resources?
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How does the economic condition of a nation depend on its natural resources?
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Which medicinal plants will you grow on your school premises and near your house? Why?
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______ is not a function of the muscular system.
Concept: undefined >> undefined
Find a match for me.
| Group A | Group B | ||
| (1) | Cardiac muscles | (a) | always function |
| (2) | Are brought about by muscles. | (b) | we never feel tired. |
| (3) | Pepsin | (c) | uncontrolled and painful contraction of muscles. |
| (4) | Cramps | (d) | chewing movements of jaws. |
| (5) | Skeletal muscles | (e) | enzyme of the gastric juice. |
Concept: undefined >> undefined
Distinguish between the following.
Periodic change and non-periodic change
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Distinguish between the following.
Natural change and man-made change
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Under which different types can the following changes be classified?
Conversion of milk into yoghurt.
Concept: undefined >> undefined
