SCIENCE FORM 2 CHAPTER 9 HEAT

1. Heat is a form of __________________ .

• length

• energy

• degree of hotness

SI unit for temperature is ______________________

• Celsius

• Fahrenheit

• kelvin

Temperature can be measured by using a ___________________________

• hot water beaker

• thermometer

• thermostate

A beaker of water with higher temperature shows the heat energy is __________________________ by ice cubes that are melting in the water.

• released

• increasing

• absorbed

• the same

Two beakers, beaker A and beaker B with same volume of water shows the temperature of water in beaker B is higher than beaker A. Therefore the quantity of heat energy in beaker _______ is higher.

• B

• A

When a beaker of water is heated, the heated water __________ above and the cold water _______________ .

• move down, rises

• move around, rises

• rises, rises

• rises, moves down

CONVECTION , Heat is transferred by the movement of fluid. The liquid and gases particles that receive heat energy will __________________ , become less dense and _______________ .

• collide more frequently , expand

• expand, move faster

• be hot, contract

RADIATION . The process of transferring heat without any medium. Heat can propagate through an empty space or ______________ .

• air

• liquid

• solid

• water

Materials that allow heat flow are known as _____________________________________________

• conductor of electric

• conductor of light

• conductor of heat

Thermal equilibrium occur when:

- when two objects are in thermal contact

- The heat energy is transferred from a higher temperature object to a ___________________

temperature object.

- finally the two objects will reach the same _______________________________

• higher, different

• lower, temperature

• temperature, lower

• lower, heat