Chapter Based Formative Assessment

_____ currents are produced when liquids and gases are heated.

We receive heat from the sun by _____(convection/radiation) mode of heat transfer.

A laboratory thermometer can be used to measure the body temperature of humans.

Solids are heated mainly by conduction.

Gunny bags are used to prevent melting of ice because a lot of air is trapped in them.

Two thin blankets are usually warmer than one thick one.

In radiation mode of heat transfer, the particles of the medium move from one place to another, carrying heat with them.

Solve the crossword puzzle with the help of given clues.

ACROSS

1. Mode of heat transfer from hot end to the colder end of the same body. ($10$)

2. A modification in the capillary tube of the clinical thermometer. ($4$)

3. Commonly used scale for measuring temperature. ($7$)

4. Commonly used thermometric liquid. ($7$)

5. Convection current of air from sea towards land. ($9$)

DOWN

6. Cyclic movement of a liquid or a gas due to difference in temperature. ($10$)

7. Poor conductor of heat. ($5$)

8. Good conductor of heat. ($6$)

9. Non-conductor of heat and electricity. ($9$)