YEAR 5 SCIENCE CHAP 6

What is heat?

• Heat is a type of chemical energy that produces light

• Heat is the form of energy that generated the electricty

• Heat is a form of energy that is transferred due to the difference in temperature

• Heat is the kinetic energy that produces sound

What happen if a metal block is heated?

• The metal block will become small in size

• The metal block will expand in size

• The metal block losses its heat

• The metal block will absorb heat

It is the degree of hotness or coldness of a material.

• Heat

• Power

• Thermometer

• Temperature

Heat can be transferred from cold to hot material

• Yes

• No

Answer explanation

Heat is always transferred from hot to cold material until both materials have same temperature/the temperature is at equilibrium

Choose the thermometers that can be used to measure the temperature of a boiling water

• Clinical thermometer

• Lab thermometer

• Kitchen thermometer

• Room thermometer

Answer explanation

Kitchen and lab thermometers can use to measure the boiling point of water (temp of 100-degree Celsius)

We can use mercury inside the thermometer to check the temperature as mercury can expand and contract according to the temperature

• True
• False

What is the correct eye level when reading a thermometer?

• Above the meniscus level

• Below the meniscus level

• Same level of meniscus level

• Upside of the thermometer

Gaps between the railway track is to make sure that the metal is joined well with the connectors

• True
• False

Answer explanation

The gaps between the railway track are to make sure that the railway is not cracked/damaged during the expansion and contraction of the track.

When water is heated, the water molecules losses heat and expands.

• True
• False

Answer explanation

When water is heated, the molecules will gain heat and moves faster. This will expand the volume of the water.

Why the spoon inside hot coffee is hot when it is placed inside the coffee?

• Heat transfers from the surrounding to the spoon

• Heat is transferred from the Sun to the coffee

• The heat is transferred from the spoon to the coffee

• The heat is transferred from the hot coffee to the metal spoon