Question

Q4.Answer the following questions in one word:.
(a)Wastes that is hazardous to health.

(b)Layer of gas that protects us from UV rays.

(c)Generating electricity through the water present in dams.

(d)Method of making a permanent magnet using one magnet.

(e) Device used to make or break a circuit.​

Answer 1

Answer:

Health risks

sharps-inflicted injuries;

toxic exposure to pharmaceutical products, in particular, antibiotics and cytotoxic drugs released into the surrounding environment, and to substances such as mercury or dioxins, during the handling or incineration of health care wastes;

Ozone Layer

The Ozone Layer is the part of the atmosphere that protects us from harmful UV rays.

Here are some suggestions:

Find how many pins, tacks or paper clips will hang end-to-end from the magnet.

Lay a pin on the table. Gradually bring the magnet towards it. Measure the distance at which the pin starts to move.

Place a plotting compass on the table. Bring the magnet towards it from the side (east or west).

Switch

Complete answer:

Switch is an electrical device that can disconnect or connect the conducting path in a circuit, it can interrupt the electrical current or divert it from one path to another. Hence switch is the device which is used to break or make an electrical circuit.

Explanation:

Answer 2

Answer:

1. nonhazardous
2. Ozone
3. impoundment facility
4. Using electric current.
5. switch

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