Thermal Dynamics Quiz

Which of the following materials is the best thermal conductor?

Convection is the main method of thermal energy transfer in solids.

What are the two mechanisms through which thermal conduction occurs?

When a fluid is heated, it becomes less _______ and rises.

Match the heat transfer method with its primary medium:

What happens to the density of a liquid or gas when it is heated?

Convection can occur in solids.

What is the name of the motion that results from a heated liquid or gas rising and a cooler liquid or gas moving in to take its place?

Why is the iron rim heated before fitting it onto a wooden wheel?

Pouring cold water over the heated iron ring that has been fitted on a wooden wheel causes the ring to expand further.

Why is a small gap left between successive lengths of rail tracks?

Telephone wires and cables are left ______ so they can change length with temperature changes.

Match the following situations with the principle of thermal expansion they demonstrate:

What happens when railway tracks expand due to heat, if there are no gaps?

Hot water is used to contract a metal lid when it is too tight on a glass jar.

Why do electrical cables and telephone wires sag in summers?

What is the primary objective of the experiment described on page 20 regarding heat transfer?

The experiment on page 21 uses a metal ball and ring to demonstrate thermal expansion in liquids.

In the experiment with the colored water in a flask, what will be observed when the flask is heated?

The experiment on page 21 includes a group focusing on thermal expansion in _______ using colored water in a flask.

Match the materials to the experiment they are used in:

According to the provided text, what is one of the objectives of investigating thermal radiation practically?

Stopping heat from being applied to the flask will cause the water level in the capillary tube to rise.

Name one scientific skill used during the investigation of heat transfer in the content on page 20.

What causes convection?

Thermal radiation requires a medium to travel.

What type of electromagnetic radiation is thermal radiation?

The rate of evaporation increases with increased ___________.

Match the following surface types with their properties regarding thermal radiation:

Which of these is NOT a factor in the amount of thermal radiation emitted by an object?

Shiny objects are good at both absorbing and emitting thermal radiation.

Why are the chargers for laptops often colored black?

Evaporation occurs only from the ___________ of a liquid.

Which of the following is NOT true about boiling?

What substance is used to visually observe convection currents in the glass tube experiment?

Evaporation causes cooling because the molecules with the highest energy escape the liquid.

Convection can occur in a vacuum.

In the context of thermal convection, what happens to the density of a fluid when it is heated?

How does air movement affect the rate of evaporation?

In thermal convection, warmer, less dense fluid ______ while cooler, more dense fluid sinks.

The larger the ___________ of a liquid, the faster evaporation occurs.

Match the terms with their descriptions in the context of thermal convection:

Which of these is the best description of the difference between boiling and evaporation:

Which of the following is NOT a key aspect of conducting a fair test on heat absorption?

The hotter an object is, the less thermal radiation it emits.

A student should only measure the temperature once and not record more data when investigating heat absorption?

What is the best way to present the data collected in a heat radiation experiment?

The device described in the text is used to absorb thermal energy from the sun. What is the name of the process that transfers energy from the sun to the device?

In the described device, thermal energy is transferred through the plastic pipe wall via convection.

What is the name of the instrument used to measure temperature?

Thermal energy from the sun heats water as it flows through a ______ plastic pipe.

Match the following heat transfer methods with their descriptions:

A material that reduces heat transfer by conduction would be known as a thermal:

The color black is ideal for reducing thermal energy absorption via radiation.

What flow characteristic of the cold water helps to maximize thermal energy transfer in the device described?