energy transformation

Jane puts some water into an electric kettle and then she connects it to the power source. She observes that after some time, the water inside the kettle heats up and begins to boil. What is happening?

C) Electrical energy is transforming into heat energy.

Which type of energy transformation does NOT describe potential energy being changed into kinetic energy?

Compressing a spring.

Energy can be changed from one form to another. Changes in the form of energy are called energy conversions. Identify which best describes the energy used to pluck guitar strings to make sound.

D) mechanical

A ball is projected into the air. Describe the change(s) in potential and kinetic energy.

Kinetic energy decreases as potential energy increases; once at the top, potential energy decreases as kinetic energy increases.

As temperature of this substance rises from 20°C to 50°C, the substance _______ heat and its kinetic energy _________ .

absorbs; increases

Which set of items listed can be arranged to transform electrical energy into mechanical energy?

battery, wire, iron

A ball is falling after rolling off a tall roof. The ball has...

both kinetic and potential energy.

On Halloween, you take a glow stick, crack the capsule inside and shake it until it glows. This is an example of light energy being created from ___________________ energy.

chemical

Your hands get warm by a fire because ________________energy is converted into heat energy.

chemical

A drawn bow possesses mechanical energy in the form of _______________. After the arrow is released, the energy is transformed into _________________.

elastic potential energy; kinetic energy

A windmill converts the mechanical energy of wind into _________ energy produced by a generator.

electrical

You are learning about energy transformations in science class. Mel and Sam's built this set-up to see if light energy could be transformed into _________ energy.

heat

A boulder that is resting on the top of a cliff slips over the edge and accelerates towards the ground. As the rock falls, the amount of kinetic energy

increases.

When a television is turned on, it converts electrical energy into many other forms of energy. Which set of words correctly lists MOST of these forms?

light, sound, and heat

When Clayton lights a firework, its potential energy is converted to all but what form?

mass

What form of energy does a compressed spring have?

potential energy

As a roller coaster goes downhill

potential energy is converted into kinetic energy. potential energy is converted into kinetic energy.

A ball is tossed up in the air. At its peak, it stops before beginning to fall. The ball at its peak has...

potential energy only.

The rock in the picture is pushed over the edge and it begins to fall. Which type of energy conversion is taking place?

potential to kinetic

A soap box derby car at the top of a ramp has more _________ energy and at the finish line at the bottom of the ramp it has more _________ energy.

potential, kinetic

Describe the relationship between kinetic energy and speed

A positive, but not linear relationship.

Which example shows electrical energy being transformed into heat energy?

B) a small toaster oven toasts a bagel

How does the mass of a bowling ball that has been rolled down the lane affect the kinetic energy?

The kinetic energy is increases proportional to the mass of the bowling ball.

A book is pushed and released and it slides across a table for a short distance. The book quickly comes to a stop. The book originally has kinetic energy. To what form of energy is the kinetic energy transformed?

The kinetic energy is transformed into heat.

When a person does work on an object, the object gains energy. As a bicycle rider rides from the bottom to the top of a hill, the energy from the work can become which combination of types of energy.

The riders work becomes a combination of gravitational potential, kinetic energy and heat

An old clock has a spring that must be wound to make the clock hands move. Which statement describes the energy of the spring and hands of the clock?

The spring has potential energy and the hands have kinetic energy.

Students design a model roller-coaster track. They place a rubber ball at the highest point on the track and let it go. The ball rolls along the track pulled only by the force of gravity. Eventually, it comes to a stop. Which change to the design will result in the ball moving the greatest distance?

Using a metal ball instead of a rubber ball