Its More Fun in Science

1. As you move close to a campfire, you notice the air seems warmer the nearer you get to the fire. Without touching it, you can tell that the fire is quite hot compared to its surroundings. Which type of heat transfer is exhibited in the situation?

• Conduction

• Convection

• Radiation

• Forced Eviction

How does the mechanism of the flow of heat in objects take place?

• From hotter to lower temperature objects.

• From colder to hotter temperature objects.

• From hotter to lower and going back to hotter objects.

• From colder to hotter and going back to colder objects.

It is an instrument that measures the hotness or coldness of an object.

• ammeter

• electroscope

• ohmmeter

• thermometer

One cold morning, you stand barefoot on a cement floor and your feet feel cold because

• the heat from the floor flows to the feet

• The heat from the feet flows through the floor.

• the temperature of the feet is the same as the floor

• the temperature of the floor is higher than that of the feet

Which property of a substance must have so that convection can take place?

• It must be solid.

• It must be a good electrolyte.

• It must be a good conductor of heat.

• Its destiny must change with temperature.

It is a measure of the internal energy that has been absorbed or transferred from one body to another.

• Electricity

• Heat

• Temperature

• Wave

7. Which of the situations is heat transfer through conduction?

• Warm air rises as the cold air sinks.

• Meat is roasted over the burning charcoal

• The sun heats the surface of the bodies of water.

• The spoon becomes hotter when placed in a glass of hot water.

Among the methods of heat transfer, how do you call the process wherein the heat is transferred directly through particle collisions.

• Absorption

• Conduction

• Convection

• Radiation

In convection, why does the heated portion of fluids move?

• Its molecular motions become aligned.

• due to the currents in the surrounding fluids.

• due to the molecular collisions within the heated portion.

• heated portion’s density is less than that of the surrounding fluid.

It is a good conductor of heat.

• metal

• rubber

• paper

• wood