0654 P3 Thermal Physics Quiz

A liquid is heated in a beaker The density of the liquid changes as its temperature increases.This causes energy tobe transferred throughout the liquid. How does the density change and what is this energy transfer process?

A rod is made half of glass and half of copper. Four pins A, B, C and D are nattached to the rod by wax. The rod is heated in the centre as shown. The pins fall off when the wax melts. Which pin falls off first?

Which process involves convection?

A student suggests some uses for containers made from good thermal conductors and for containers made from poor thermal conductors. In which row are both suggested uses correct?

A cotton sheet is ironed with a hot electric iron. How is energy transferred through the metal base of the iron to the sheet?

Two plastic cups are placed one inside the other. A small spacer keeps the two cups separated. Hot water is poured into the inner cup and a lid is put on top, as shown. Which statement is correct?

A solid is heated from room temperature. The graph shows how its temperature changes with time as it is heated constantly. At which time has it just become completely liquid?

Thermal energy travels through space from the Sun to the Earth. Space is a vacuum. How is thermal energy transferred from the Sun to the Earth?

The diagram shows a vacuum flask used to keep liquid hot. How does thermal energy pass through the vacuum?

One method of heat transfer involves the energy travelling at a much greater speed than in other methods. What is the name of this method?

The diagram shows a block of ice placed in a warm room. At which point is the temperature the lowest?

The air in a room is heated by a heater. The diagram shows the circulation of the air in the room. Which statement about the air that is heated is correct?

In a refrigerator, the cooling unit can be fitted either at the top or at the bottom. In an oven, the heater can be fitted either at the top or at the bottom. Which row shows the best position for the cooling unit and the best position for the heater?

 A girl is outdoors. She warms her hands by holding them near a fire, as shown. How does the heat from the fire reach her hands?

A heating engineer fits a heater to the ceiling of an office so that workers in the office are kept warm. How does thermal energy reach the workers below the heater?

A substance loses thermal energy (heat) to the surroundings at a steady rate. The graph shows how the temperature of the substance changes with time. What could the portion PQ of the graph represent?

A student wishes to check the upper and the lower fixed points on a Celsius scale thermometer. She has four beakers P, Q, R and S. Beaker P contains a mixture of ice and salt. Beaker Q contains a mixture of ice and water. Beaker R contains boiling salt solution. Beaker S contains boiling water. Which two beakers should she use to check the fixed points?

The same quantity of thermal energy is supplied to two solid objects X and Y. The temperature increase of object X is greater than the temperature increase of object Y. Which statement explains this?

Which statement describes what happens as ice at 0 °C starts to melt to become water?

What is meant by the fixed points of the scale of a liquid-in-glass thermometer?

A liquid at room temperature fills a flask and a glass tube to level X. The flask is now placed in ice, and the liquid level in the tube falls to level Y. Why does the level fall?

The melting points of ethanol and mercury are shown. Which of these two liquids is / are suitable to use in a liquid-in-glass thermometer to measure temperatures of –50 °C and –120 °C?

 Which quantity gives the thermal capacity of a beaker?

A jug of water is at room temperature. Several ice cubes at a temperature of 0 °C are dropped into the water and they begin to melt immediately. What happens to the temperature of the water and what happens to the temperature of the ice cubes while they are melting?

An engineer wants to fix a steel washer on to a steel rod. The rod is just too big to fit into the hole of the washer. How can the engineer fit the washer on to the rod?