Electrical Circuits
Electrical Energy
Energy Transformation
Reflection/ Refraction
Light Travels
100
What is an electric current?
The flow of electricity through a conductor.
100
What is a battery?
a device that produces an electric current due to the changes to the materials inside it.
100
A hair blow dryer produces heat and blows air. What does the hair dryer demonstrate about the transformation of energy?
The device transforms electric energy into thermal energy and energy of motion.
100
What is "absorb" in the context of light?
is to soak up or take in (when sunlight strikes an object, some of the colors are absorbed)
100
Looking through a magnifying glass is an example of what?
Refraction
200
What is an electric circuit?
a closed path through which an electric current can flow.
200
Read the image below. Will this circuit light the lightbulb as it is set up currently? Explain why or why not. What needs to be done to fix it?
No, this circuit will not light the lightbulb as it is set up because the wires are both connected to the same side of the battery. There needs to be one wire on the positive (+) side and one wire on the negative (-) side.
200
Ms. Weeks and Mrs. Herrera are making fruity smoothies for a snack. They are using a blender to make them! What energy transformations are happening when the blender turns on?
The blender begins with electrical energy. This energy is then transformed to energy of motion and sound energy.
200
What is reflection? Give examples
The bouncing of light off of a surface. For example, looking in a mirror at yourself. Another example is the trees reflected on the water of a pond.
200
Which materials does light travel through in a straight line? List all that apply. (air, mirror, concave lens, or glass)
air and glass
300
What are the three parts required in an electrical circuit?
An energy source (battery), an electric appliance or device (toaster), and a conductor (wires)
300
What is refraction? Give an example.
is the bending of light as it passes from one transparent material to another, such as through air into glass or from air into water. For example, a rainbow after rain ALSO when at the pool, a beam of light from the sun travels through air into water and bends.
400
What is a complete circuit?
A system that when the switch is closed, creates a closed path through which an electrical current flows.
400
List the 4 types of energy that can be produced by electricity. List examples of each.
Light energy- lamp
Sound energy- phone
Energy of motion- fan
Thermal energy- blow dryer
400
What happens to the light when you point a laser pointer light at a concave lens?
The light bends outward, which is refraction.
500
Give an example of electrical energy being transformed into thermal energy?
The toaster uses electrical energy to heat the piece of bread to toast it
500
On a hike in the woods, you discover a lake. There are trees all along the water. You notice you also see those trees on the water itself. What is happening?
The image of the trees is being reflected on to the water.