100
At the top of his jump, the skate-boarder looks like he has almost stopped moving. His __________________ ____________________is at a maximum.
potential energy
100
What are the two ways a machine converts energy?
A machine can make work easier by changing the size or direction (or both) of the force needed to do the work.
100
Alarm Clock Electrical Energy→
light energy and sound energy
100
Your body stores ______ energy . This energy is changed into kinetic energy when your muscles contract and relax.
Chemical
200
Complete the process chart below:
Food has chemical energy
You eat _________________________.
Your body stores the chemical energy of the food.
Chemical energy is converted into:
_________________________
_________________________
_________________________
Breakfast (Food)
Kinetic Energy
Thermal Energy
200
Battery Chemical Energy→
electrical energy
200
Light Bulb Electrical Energy→
light energy and thermal energy
200
Your legs transfer ________ energy to the pedals by pushing them in a circle.
Kinetic
300
Electrical energy is changed into ___________________ _______________ as many wires in the hair dryer heat up.
Thermal Energy
300
The fan moves air across these hot wires. This blows hot air out of the hair dryer. You hear _______________________ ___________________that comes out of the hair dryer.
Sound Energy
300
Blender Electrical Energy→
kinetic energy and sound energy
300
The pedals transfer __________ energy to the wheel and then to the chain.
Kinetic
400
The electrical energy enters the hair dryer. This energy is changed into _______________ _______________ when a small electric motor spins a fan blade.
Kinetic Energy
400
Light energy from the sun is converted into what kind of energy by green leaves?
Chemical energy
400
You can change the shape of a rubber band by stretching it. Stretching the rubber band takes a little effort. The energy you put into stretching it becomes elastic potential energy.
Describe How does a rubber band gain elastic potential energy?
400
The chain moves and transfers kinetic energy to the back wheel. This gets you __________ and keeps you moving.
moving