Forms of Energy
This is the energy of motion that all moving objects have.
What is kinetic energy?
Energy is measured in this SI unit.
What is the joule (J)?
Kinetic energy depends on two main factors: the object’s speed and this.
What is mass?
The energy stored when an object is stretched, twisted or compressed is called this type of potential energy.
What is elastic potential energy?
When energy passes from one object to another without changing form, it is called this.
What is energy transfer?
This is energy stored because of an object’s position, like a book on a shelf.
What is gravitational potential energy?
Mass in science is usually measured in this unit.
What is the kilogram (kg)?
True or false: A car has more kinetic energy when moving at 100 km/h than at 40 km/h.
What is true?
Lifting an object higher in Earth’s gravitational field increases this form of potential energy.
What is gravitational potential energy?
When electrical energy is changed into light and heat in a light bulb, this type of energy change is occurring.
What is energy transformation?
The Sun provides this form of energy that solar panels transform into electricity.
What is light energy?
The standard unit for speed in kinetic energy calculations.
What is metres per second (m/s)?
If two vehicles travel at the same speed, the one with more of this has the greater kinetic energy.
What is mass?
A diver climbs from the pool deck to the top platform, increasing her gravitational potential energy. Which two factors, besides height, determine how much gravitational potential energy she gains?
What are mass and gravity (g)?
In a hydro power plant, water falling through the dam mainly transforms gravitational potential energy into this form before it becomes electrical energy.
What is kinetic energy?
An oven uses this form of energy to heat food
What is thermal energy (heat energy)?
In the equation Ek=1/2mv2, this symbol represents kinetic energy.
What is Ek
When an object’s speed doubles, its kinetic energy becomes this many times larger.
What is four times as large?
In the equation Ep=mgh, increasing this variable (height) increases gravitational potential energy.
What is h (height)?
A soccer player kicks a ball. The player’s foot gives kinetic energy to the ball. Is this an example of energy transfer or energy transformation?
What is energy transfer?
Your ears detect this type of energy when a speaker vibrates the air.
What is sound energy?
In the gravitational potential energy equation Ep=mgh, this letter stands for the gravitational field strength, which is about 9.8 N/kg near Earth’s surface.
What is g?
In the formula Ek=1/2mv2, which variable has the greatest effect on kinetic energy?
What is velocity?
A bungee jumper has both elastic and gravitational potential energy. Name one way to increase the elastic potential energy in the bungee cord.
What is stretching the cord further before jumping?
In a kangaroo’s hop, as it lands its leg tendons stretch and store energy, and as it pushes off that energy becomes motion again. Name the two forms of energy involved in this transformation.
What are kinetic energy and elastic potential energy?