Which statement best explains why water in a glass becomes colder when ice cubes are added?

Which diagram best represents the direction of convection currents around the burning wood of a campfire?

A barefoot student steps on a hot concrete surface. Most of the heat transferred to the student's skin by this contact is by the process of _____.

The accompanying diagram shows the heating of water. The main method of heat transfer occurring within the water is called

The diagram shows a student heating a pot of water over a fire. The arrows represent the transfer of heat. Letter A represents heat transfer through the metal pot, B represents heat transfer by currents in the water, and C represents heat that is felt in the air surrounding the pot. Which table correctly identifies the types of heat transfer at A, B, and C?

Which Earth surface would most likely absorb the greatest amount of insolation on a sunny day if all of these surfaces have equal areas?

Which is responsible for producing heat and light from the sun?

Which type of energy is stored in coal and oil?

Which kind of energy is produced when a student beats a drum?

Which forms of energy are produced by a burning candle?

A toaster changes electrical energy to

Which form of energy is needed to change water from a liquid to a gas?

Which type of energy does a person use to pedal a bicycle?

Which object is the best conductor of electricity?

A girl signals her friend by shining a flashlight on a mirror. Her friend can see the signal because

A car skids along the road and smoke appears to be coming from under the tires. The heat that produces the smoke is caused by

When a baby shakes a rattle, it makes a noise. Which form of energy was changed to sound energy?

Which object is the best conductor of electricity?

Which type of energy is needed to cut a piece of wood into smaller pieces with a saw?

Which energy transformation occurs when a person hits a drum with a drumstick?

A student rubs her hands together on a cold winter day. The heat that warms her hands is produced by

When a lightbulb is lit, electrical energy is changed into light energy and

Which statement describes how energy can be helpful?

Two empty metal cans, one black and one white, were placed outside on a hot day. Both cans were the same size and were left in the Sun for 3 hours. Compared to the white can, the black can would most likely be

Solar panels are used to absorb sunlight. Which color panel would absorb the most sunlight?

The diagram below shows a wood fire burning. Which form of energy does the wood contain so that the fire will burn?

Which of the following converts electrical energy into motion?

Water can provide energy that may be changed into electricity. Which kind of water could be used to provide electricity?

Windmills are used to convert wind energy into a more useful form. In most cases, there are three steps in this process. The energy is in a different form at each step. Which of the following flowcharts shows the most likely order of the energy changes?

Which of these statements best describes the diagram?

A family is moving from Pennsylvania to Connecticut during the summer. As the moving van burns gasoline in its engine, it converts ________.

The bicycle rider ate breakfast before the ride. Which of the following energy transformations occurred during the bike ride?

The Rocket's Red Glare: On the 4th of July there was a fireworks display near the Connecticut River in Hartford. There were many different colorful fireworks in the show. Energy changes occur during the flight of a firework rocket. Which of the following represents a correct energy change?

Which vehicle pictured would require the more powerful braking system?

What is an energy change that takes place in a lightbulb?

As a heavy metal ball rolls down a hill, it goes faster and faster. Which statement is true?

Noah carried a skateboard up a hill and then rode the skateboard down the hill. When Noah reached the bottom of the hill, he rolled to a stop. When did Noah have the most potential energy?

Energy appears in many forms. What form of energy is lightning?

Heat, light, and sound are all different forms of _______.

At which labeled point does the diver have the least potential energy?

A student is investigating potential and kinetic energy by stretching a spring across a table. When the student lets go, the spring recoils. At which time is potential energy in the spring being converted into kinetic energy in this system?

A skateboarder travels from location 1 to location 4 as shown below. At which location does the skateboarder have the most kinetic energy and the least potential energy?

The figure shows a wagon that moves from point X to point Y. Which of the following best describes the wagon's change in energy as it coasts from point X to point Y?

Which of the following increases when a metal spring is stretched horizontally?

The figure represents a pendulum's motion with the lowest point of its swing labeled P. What happens to most of the pendulum's gravitational potential energy as it reaches the lowest point P?

A pendulum swings back and forth several times. Assume friction is negligible. Which of the following graphs best illustrates the potential energy (PE) and the kinetic energy (KE) of the pendulum over a period of several swings?

Which of the following is an example of a form of energy?

Two identical books are placed on a bookshelf. Book 1 is on a shelf one meter above the floor and Book 2 is on a shelf two meters above the floor. Which statement best compares the potential energy of the books?

In 1850, James Prescott Joule, inventor of arc welding, stated that energy does not disappear when transformed in a machine. Joule showed that some mechanical energy is always transformed into

When you are sitting in a room listening to a radio, to what form of energy are your ears reacting?

Use the picture to answer the question below. As a river flows past a turbine in a hydroelectric power plant, the potential energy of the water behind the dam changes to

The picture shows a lit bulb. Which sentence explains what happens to the electric energy as the light shines?

A car, a train, a bicycle, and a skateboard are traveling at the same speed. Which object has the greatest kinetic energy?

The following pictures show examples of potential energy. Which of the following is an example of chemical potential energy?

Carrie is looking at the following diagram. Which list describes the objects and their type of potential energy?

Which objects represent elastic potential energy?