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Explain why mountaineers carry oxygen cylinders with them?
Concept: undefined >> undefined
Explain why during an incident of fire, one is advised to wrap a woollen blanket over a burning object.
Concept: undefined >> undefined
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Short Answer Type Question:
How will you separate oil and water from their mixture?
Concept: undefined >> undefined
Short Answer Type Question:
Define winnowing.
Concept: undefined >> undefined
Short Answer Type Question:
What do you mean by sieving? Give an example.
Concept: undefined >> undefined
Match the column:
| Separation Process | Purpose for which we do the separation | What do we do with the separated components? |
| (1) Separate stones from rice | (a) To separate two different but useful components | (i) We throw away the solid components |
| (2) Churning milk to obtain butter | (b) To remove non-useful components | (ii) We throw away the impurities |
| (3) Separate tea leaves | (c) To remove impurities or harmful components | (iii) we use both the components |
Concept: undefined >> undefined
Long Answer Type Question:
What is threshing?
Concept: undefined >> undefined
Long Answer Type Question:
Describe the method to obtain salt from sea water.
Concept: undefined >> undefined
Long Answer Type Question:
What is decantation?
Concept: undefined >> undefined
Long Answer Type Question:
Where is decantation used? Give two examples.
Concept: undefined >> undefined
Long Answer Type Question:
How will you prepare cheese (paneer)?
Concept: undefined >> undefined
Explain the method that can be used for separating the following mixture:
Sand and husk
Concept: undefined >> undefined
What is open circuit?
Concept: undefined >> undefined
Explain the method that can be used for separating the following mixture:
Wheat, sugar and stalk
Concept: undefined >> undefined
Explain the method that can be used for separating the following mixture:
Water and petrol
Concept: undefined >> undefined
Explain the method that can be used for separating the following mixture:
Rice and salt
Concept: undefined >> undefined
Explain the method that can be used for separating the following mixture:
Sand and salt
Concept: undefined >> undefined
In any electric circuit, when the switch is on and the current flows through it why do the wire, switches, bulb or devices become hot?
Concept: undefined >> undefined
If you touch an electric wire carrying current you get a shock, but if on the same wire the birds sit they do not get any shock/current. Explain why?
Concept: undefined >> undefined
What is shadow?
Concept: undefined >> undefined
