Levi rubs two wooden sticks together. Which statement best describes what happens?

There is an increase in the temperature of the sticks.

The particles of the wood move apart from each other.

The particles of one wooden stick transfer to the other wooden stick.

Yuri is conducting an investigation into thermal energy. She intends to place a piece of hot metal into a container of water at room temperature. Which of the following might she reasonably infer will happen?

The temperature of the water will increase when the piece of hot metal is placed into it.

The particles of water will move faster after coming in contact with the piece of hot metal.

Thermal energy will be transferred from the piece of hot metal to the cooler water.

Suppose you have two cups of water, one small and one large. Both are at the same temperature. Which of the following statements is true?

The large cup of water has more thermal energy than the small cup of water.

There are more particles of water in the small cup.

The particles of water in the small cup are moving slower than the particles of water in the large cup.

The particles of water in the small cup are moving faster than the particles of water in the large cup.

The Law of Conservation states that energy cannot be created or destroyed. Energy can only be transformed from one type to another or passed from one object to another. Which of the following examples best demonstrates this idea?

The burning fuel in a hot air balloon transfers thermal energy to air, which lifts the balloon.

A person getting into a hot tub transfers energy to the tub.

Charged batteries transfer some of their energy to dead batteries to restore their power.

A beehive transfers some of its stored energy to the bees in the hive to keep them warm.

There are three important ideas that make up the particle model of matter. Which of the following statements is not one of these ideas?

All substances are made of particles, some of which cannot be seen.

All substances are made of tiny particles too small to be seen.

Particles are always in motion.

Particles have spaces between them.

What is one advantage of using a thermocouple instead of a regular laboratory thermometer?

It can be used to turn an electrical switch or valve on or off.

It can be used to obtain a continuous record of temperature changes over a period of time.

It provides a photograph that shows the temperature of an object.

It uses the expansion and contraction of air to provide accurate temperature readings.

Why does a bimetallic strip bend when it is heated?

One of the metals expands more than the other.

The two metals are joined loosely together.

One of the metals contracts more than the other.

Both metals expand at the same rate.

You will be travelling to India this summer. Your guide book states that , in the region where you will be staying, the temperature often reaches 40°C. What do you suppose your body temperature will be during your visit?

37°C, since the body gets rid of excess thermal energy through perspiration and evaporation

40°C, since the body adapts itself to the temperature of its surroundings

40°C, since the body feels hot and "sweats it off"

37°C, since human body temperature never changes

A mug of hot chocolate takes less time to make at the top of a mountain than it does at sea level. Why is this the case?

The weight of the air is lower on the mountaintop than it is at sea level.

The water pressure from the sea is not adding extra pressure at the mountaintop.

You are closer to the sun at the top of a mountain than you are at sea level.

The statement is not correct. It takes longer to make a mug of hot chocolate at the top of the mountain than it does at sea level.

Which of the following statements best describes the method of energy conservation known as cogeneration?

Waste heat from one industry is used by another industry.

Water from one power station is recycled to produce electricity for another power station.

Two industries produce thermal energy at the same time.

Energy is generated from the burning of coal in factories.

You are trying to explain to your parents why they should drive less. You start by telling them that heat engines are inefficient and explaining the reasons why. Which of the following is not a reason for their inefficiency?

When people leave their cars running in the winter while they run errands, fuel is wasted.

Friction between parts of the engine causes a loss of efficiency.

Heat that escapes in the exhaust gases and through the sides of the engine is a loss of energy.

Carnot showed that efficiency is related to the temperature of intake and exhaust gases.

How are greenhouse gases involved in global warming?

They trap thermal energy and warm Earth.

Normal amounts of these gases prevent the drying up of lakes.

They increase smog levels in the major cities.

They cause a release of excess energy as they change their state.

How does this cloth help make the person cooler?

The liquid evaporates from the cloth carrying thermal energy from the cloth and drawing energy from the skin to the cloth.

Describe the motion of the water particles in the moist cloth after it is placed on the warm forehead.

particles move quicker as they gain energy from the forehead

faster moving particles leave the surface of the cloth

slower moving particles stay behind

Unit #3 Heat & Temperature Test

7th Grade

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39 Qs

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Unit #3 Heat & Temperature Test

39 questions

The temperature of boiling water at sea level is 0°C.

Thermographs are recording thermometers that are able to indicate several temperatures at the same time.

The boiling point of water is 100°C.

According to the particle theory, particles move more slowly when the temperature is increased.

The forces holding liquid particles together are weaker than those holding gas particles together.

According to the particle theory of matter, particles are always moving except when the temperature begins to decrease.

Energy is a measurement of something's ability to cause changes or to make something else move.

Waste products of industrial processes warming the environment.

Energy released or transferred by a moving object.

Ability to do work or to cause change.

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