Thermal energy and Heat
Which is equal to a temperature of 50°F? 18°C 46°C 10°C 32°C
10°C
Which best describes thermal energy? It is the difference between internal energies of two or more substances It is the sum of internal energies of two or more substances It is the portion of internal energy that can be transferred from one substance to another It is the portion of potential energy that can be transferred from one substance to another
It is the portion of internal energy that can be transferred from one substance to another
Barbara is converting 78°F to degrees Celsius. First, she subtracts 32 from 78. What is the next step? multiply 46 by 5/9 multiply 46 by 9/5 add 273 to 46 subtract 273 from 46
Multiply 46 by 5/9
The diagrams show the movement of particles for two substances. Which best compares the temperatures of the substances? Substance X has the highest temperature because its particles have more kinetic energy Substance X has the highest temperature because it has fewer particles Substance Y has the highest temperature because its particles have more kinetic energy Substance Y has the highest temperature because it has more particles
Substance X has the highest temperature because its particles have more kinetic energy
What happens when heat is removed from water? The water particles move farther apart The water changes from a liquid to a gas The temperature of the water increases The kinetic energy of the water particles decreases
The kinetic energy of the water particles decreases
A thermometer is placed in water in order to measure the water's temperature. What would cause the liquid in the thermometer to rise? The molecules in the water move closer together The molecules in the thermometer's liquid spread apart The kinetic energy of the water molecules decreases The kinetic energy of the thermometer's liquid molecules decreases
The molecules in the thermometer's liquid spread apart
Sayid recorded the temperatures of four substances in a chart. Which conclusion is best supported by the data? The particles in substance W have a greater average kinetic energy than the particles in substance Z The particles in substance X have a greater average kinetic energy than the particles in substance Z The particles in substance W have a lower average kinetic energy than the particles in substance X The particles in substance Z have a lower average kinetic energy than the particles in substance Y
The particles in substance W have a lower average kinetic energy than the particles in substance X
Hot coffee in a mug cools over time and the mug warms up. Which describes the energy in this system? The average kinetic energy of the particles in the mug decreases The average kinetic energy of the particles in the coffee increases Thermal energy from the mug is transferred to the coffee Thermal energy from the coffee is transferred to the mug
Thermal energy from the coffee is transferred to the mug
The diagram shows the scales used for recording temperatures. The labels for the scales are missing. Which labels complete the diagram? W: FahrenheitX: CelsiusY: Kelvin W: KelvinX: CelsiusY: Fahrenheit W: CelsiusX:FahrenheitY: Kelvin W:CelsiusX: KelvinY: Fahrenheit
W: Fahrenheit X:Celsius Y: Kelvin
Which refers to the area on the thermometer marked with the letter A? scale bulb mercury strip number line
scale
