Potential or Kinetic?
Everything that is moving.
What is kinetic energy?
This type of energy can be is produced by the back and forth vibrations or movement of an object.
What is sound?
You have an unplugged lamp and a light bulb. What kind of energy will you use FIRST to make the lamp work?
A. Electrical
B. Light
C. Mechanical
D. Sound
C. Mechanical is correct because you will need to screw the light bulb into the lamp FIRST before it will work.
Describe how light travels
In waves, in a straight line
The greatest source of energy for the planet Earth.
What is the sun?
Stored energy.
What is potential energy?
This form of energy is made of waves and travels in a straight line.
What is light?
This renewable energy source is affected by the time of day.
What is solar?
See Diagram #10 which procedure can a student use to turn on the blue and green lights only?
Close switches A and C and leave B open
What claim best explains the behavior of light as it travels through a prism?
A. It is reflected from the prism creating a rainbow
B. It bounces off the prism in different colors.
C. Colored light enters the prism and is changed into white light
D. Light refracts as it passes through the glass prism.
D
Snow on top of a mountain.
What is potential energy?
When you rub your hands very quickly together, you can feel kinetic energy being changed to this type of energy.
What is thermal or heat energy?
Windmills use moving air to turn their blades. The moving blades create energy that is used for pumping water, grinding grain, and generating electricity. A windmill uses the same type of energy as -
A. A solar panel
B. An Iron
C. A fan
D. A pinwheel
D. A Pinwheel is correct because it too requires moving air (mechanical energy) to work.
Draw a diagram representing light and the path the light would take as it is being reflected in a mirror.
The light will bounce off the mirror at the same angle it entered the mirror only going the opposite direction. Angle in = Angle out
When using a solar powered calculator what source of energy is being used to power the calculator?
A. Electrical
B. Light
C. Mechanical
D. Sound
B. Light
Legs pumping the pedals of a bike.
What is kinetic energy?
Which two objects use electrical energy to move an object?
A. A fan and a pencil sharpener
B. A radio and a Stove
C. A lamp and a Television
D. A camera and an ipod
A. A fan and a pencil sharpener both use electrical energy as a source to convert into mechanical energy to move an object.
See Diagram # 9
How many bulbs would turn on if a student closed switches B and C?
Zero Because the switch A is still open the electric current can not flow back to the battery from any light bulb.
If a laser pointer is being reflected in a mirror at a 90 degree angle where will the laser beam reflect to?
A. off of the mirror at a 45 degree angle
B. it will go through the mirror because the mirror is transparent
C. it will bend as it passes through the mirror
D. It will reflect back at a 90 degree angle striking the laser pointer from where it originated.
D Angle in = Angle out
a 90 degree right angle will reflect straight back to the source of the light
See Diagram #11
What can be done it turn off the bell but keep the bulbs lit?
Remove wire 2 only
Opening a window uses the same type of energy as...
A. Playing the drums - mechanical
B. Burning wood - thermal
C. Lighting light bulbs - electrical
D. Talking to someone - sound
A. playing the drums; because that requires mechanical energy which is the same type of energy required to open a window.
Using water to turn turbines in a Hydroelectric power plant is an example of which form of energy being used to produce electricity?
What is Mechanical Energy?
Name the clean alternative energy sources we learned about?
(Clue: Silly Boys Go Hunting on Weekends)
What are Solar, Biofuels, Geothermal, Hydroelectric, and Wind?
Which object best demonstrates refraction of light?
A. A fire
B. A mirror
C. A hand lens
D. A shadow
C. a hand lens = all lenses bend light refracting it either inwards or outwards
Which statement correctly explains which objects reflect light?
A. All objects absorb and reflect light, but its easier to tell when objects are shiny
B. Reflection is the bending of light as it passes through a different medium.
C. An object must be shiny to reflect light.
D. Objects cannot reflect light.
A - Obviously shiny objects reflect light the best but remember a green leaf only looks green because it is reflecting green light and absorbing all other colors. Things that are white reflect all colors and things that look black absorb all colors of light.