What changes can energy cause?
Which energy transformation occurs when a fan is plugged into a wall?
heat energy into motion energy
electrical energy into sound energy
energy of motion into sound energy
electrical energy into energy of motion
Electrical energy into energy of motion
What kind of energy does a thermometer measure?
chemical energy
electrical energy
light energy
thermal energy
thermal energy
What is the electric charge of a an electron?
negative
neutral
nucleus
positive
negative
Jake hangs two balloons from a desk so that they are close together but not touching. Jake rubs one balloon with a wool cloth. He does nothing to the other balloon. What happens when he lets go of the balloons?
They push one another apart.
They touch one another and stick together.
They are close together but do not touch.
They touch one another and stick together
A light bulb converts electrical energy into which of the following?
light only
thermal only
thermal and light
light and motion
thermal and light
Imagine a burning candle that burning wax due to the stored particles within the wax. Which type of energy changes take place while the candle burns?
Chemical energy (potential) to thermal to light.
A toy with a spring inside it, stops when you push it down, and moves when you let it go. What type of energy is this?
Mechanical energy
Which of the following is lightning an example of?
electric charge
electric current
static electricity
electrostatic discharge
static electricity
Wanda rubs a balloon against her wool sweater, and the balloon sticks to the sweater. Then she observes the balloon sticking to a wall. Why is this a scientific investigation but not an experiment?
It uses balloons, which are not traditional objects of scientific study.
It involves an item of clothing, which cannot be observed with objectivity.
Wanda has not identified variables or created a controlled testing situation.
Wanda observed something that can’t be explained by science.
Wanda has not identified variables or created a controlled testing situation.
Many appliances in your home and school use electrical energy. Which of these appliances is intended to convert electrical energy into sound energy?
printer
refrigerator
electric heater
music amplifier
music amplifer
BE COMPLETELY USED UP OR DESTROYED
What form of energy cooks food in a solar cooker?
chemical energy
electrical energy
light energy
mechanical energy
light energy
What is static electricity?
a flow of electrons
an electrostatic discharge
a repelling between electrons
a buildup of an electric charge on something
A buildup of an electric charge on something
Why do two socks sometimes stick together in a dryer?
Both socks have a positive charge.
Both socks have a negative charge.
Protons move from one sock to another.
Electrons move from one sock to another.
Electrons move from one sock to another
When Lindsay got home from school, she noticed that there was no electricity. Which of these items will she be able to use before the electricity comes back on?
Television
Computer
Violin
Toaster
Violin
An electric clock in a classroom will not run if it is not plugged into an electric outlet. What does the clock get from the electric current from the outlet?
batteries
chemicals
energy
time of day
One type of energy is the result of waves that travel through matter and cause particles in the matter to vibrate. Which type of energy is it?
Sound energy
Which particle of an atom is positively charged?
electron
neutron
proton
both proton and neutron
Which claim tells how Carlos could cause the balloons to attract one another and stick together?
Give them both a negative charge.
Give them both a positive charge.
Give only one of them a positive or negative charge.
Remove any positive or negative charge from both balloons.
Give only one of them a positive or a negative charge
The girl is using an electric hair dryer that has a motor.
Which energy transformation is she using?
electrical energy into heat energy and energy of motion
electrical energy into sound energy and chemical energy
sound energy into electrical energy and energy of motion
energy of motion into electrical energy and sound energy
electrical energy into heat energy and energy of motion
imagine there is a book sitting on a shelf.
Which type of energy does the book have because it is on the shelf?
chemical kinetic
electrical potential
Potential
An object has a type of energy due to the movement of electrons. Which type of energy is it?
chemical
electrical
mechanical
thermal
electrical
Which is true about how a charged object interacts with a neutral object?
The charged object becomes uncharged.
The neutral object remains neutral.
They repel each other.
They attract each other.
They attract each other
Cecilia is combing her hair. What will most likely happen when she holds the comb near a small, uncharged object?
The object will stay where it is.
The object will stick to the comb.
The object will be pushed away by the comb.
The object will gain a charge opposite that of the comb.
The object will stick to the comb
You use energy transformations every day. Which of these is a way that you would use the transformation of electrical energy to motion energy?
watching your favorite show on television
taking an elevator to the top of a tall building
listening to your MP3 player while you walk to school
turning on the lamp on your desk so you can see to do your homework
taking an elevator to the top of a tall building