Random
When you hit two objects together, what is that called?
Collision
What is sound energy?
Two object hit and the vibrations from the hit go to your ear
What do you create when you rub your hands tother when you are cold?
energy or heat energy
Electric currents are when energy travels from ____________ to __________________
one place to another place
A song plays on the radio
is electricity making sound or motion
sound
If a toy car collides with a toy truck, how can you describe that the toy car transferred energy to the toy truck?
The collision causes the car to slow down and the truck to speed up
Example of sound energy
Book hitting floor
Which one is an example of sound energy?
Painting in the dark
ice melting in the sun
plucking a guitar string
plucking a guitar string
What are the initial and final forms of energy when a battery is being used to power a car?
the first and last
Energy is stored from energy is turned into motion
An elevator goes to another floor.
Is it electrical to sound
or
electrical to motion
electrical to motion
Put in order from least to most amount of energy.
Person walking, person running, person jumping
walk, jump, run
Leo stands at the bottom of a large, empty canyon made of hard rock. He yells "Hello!" as loud as he can. A second later, he hears his own voice shout "Hello!" back to him from across the canyon.
The sound waves bounce (reflect) off the hard rock walls and travel back to Leo's ears.
A student rubs their hands together at recess in winter. They rub their hands slowly, but their hands are still cold.
How can the student make their hands warmer?
rubbing their hands faster.
Maya is building a simple circuit with a battery, a light bulb, and three copper wires. She connects everything in a complete loop, and the light bulb shines brightly. Then, she cuts one of the copper wires in half with scissors.
What happens to the light bulb, and why?
The bulb goes out because cutting the wire creates an open circuit, which stops the flow of electricity.
A toy car runs on batteries.
Goes from electrical to motion
or
electrical to sound
Motion
A student kicks a soccer ball, causing it to collide with a second soccer ball. This causes the first soccer ball to slow down and the second soccer ball to start moving.
Describe the change in energy of each soccer ball that was caused by the collision.
The energy of the ball that slowed down decreased
and the energy of the ball that started moving increased.
A student hits a baseball with a bat. This makes a cracking sound and causes the baseball to change direction and move faster.
Energy tranferred from the _____________ to the _____________
bat to the ball then to the air
A solar-powered toy car is sitting on the sidewalk. When the bright sunlight hits the solar panel on top of the car, the wheels start to spin, and the car zooms forward.
Light energy from the sun is turning into electrical energy, and then into motion (mechanical) energy.
A battery produces ______________ energy
that is transferred by the wires to the lightbulb where it is converted to _____________energy.
Electric and light
a cell phone rings
does it go from electrical to sound or electrical to motion
electrical to sound
A group of students watch toy cars gain speed as the cars roll down a ramp. The students decide to investigate whether the speed of the car changes with the height of the ramp. These are the steps of their investigation:
build ramps of different heights
put a toy car at the top of each ramp
let the car roll down
What could you change to make the car go faster.
They can make the ramp higher and steeper
Students kick a ball against a wall during recess and notice differences in the sounds made. The students make these observations:
The harder the kick the ____________ energy the soft the kick the ______________ energy
The harder the kick the more energy the louder the sound.
A group of students are throwing water balloons at each other on the playground. One student claims that throwing a water balloon slowly gives it more energy, so it will make a bigger splash. true or false
false, the slower an object moves the less energy it has.
Students are shown a generator that is used to power a radio. When they turn the crank on the generator, it powers the radio and the radio plays music.
What energy transformations that take place for the generator to power the radio?
Energy of motion is converted into electric energy
What is the vocab word for motion or movement?
Kinetic energy