Science Assessment 1 (Heat)

Which of the following statement is true about heat and temperature?

• Heat is the degree of hotness or coldness of an object

• Temperature is a form of energy

• Temperature is measured in Newton (N)

• Heat is measured in Joule (J)

Which type of heat flow does not involve any medium to transfer heat?

• Radiation

• Conduction

• Convection

Which of the following objects is made of a heat conductor?

• Plastic cup

• Stainless steel pot

• Glass container

• Wooden ladle

When air is heated, its density ___________.

• increases

• decreases

• remains the same

When you use a microwave, what is the main way that heat is transferred?

• Convection

• Conduction

• Radiation

What would be the effect on the particles if more heat is supplied to the system?

• They would slow down
• They would stop moving
• They would speed up
• There would be no effect

Which of the following is the best heat insulator?

• Silk cloth

• Paper

• Cotton cloth

• Woollen cloth

Which statements are true about the phenomenon in the diagram?

I. The warm air at the sea becomes less dense and rises. 

II. The land becomes hot faster than the sea. 

III. The cold air from the sea moves to the land to fill the empty spaces left by warm air. 

IV. The phenomenon above is called land breeze. 

• I and II only

• I and III only

• II and III only

• III and IV only

Which statements are true about the phenomenon in the diagram?

I. The air next to the lighted candle receives heat that cause the air particles to expand and become less dense.

II. The hot air will rise to the top at chimney Y.

III. Cooler air carries along the smoke particles with it from outside moves in through

chimney Y.

• I and II only

• I and III only

• II and III only

• I, II and III

State the method of heat flow