Types of energy
What is the ability to cause a change
Energy
What is the conversion of one type of energy to another
Energy transformation
What are simple machines?
Machines that do work using one movement
What is a longitudinal wave that can only travel though matter
Sound wave
What is the difference between convex and concave
Convex bends outward and concave bends inward
What is nuclear energy
What device is a great example of potential and kinetic energy going back and forth between the two forms of energy
Roller Coaster
What is the ratio of output work to input work
Efficiency
What is how high or low a sound seems called
Pitch
Explain why a red object is red
A red object absorbs all other colors of light besides red. Red is not absorbed but is reflected so this is why we see red
What is mechanical energy?
Mechanical energy is the sum of potential and kinetic energy
How much work is being done when a student lifts up a bag using 50N of force for a distance of 1.2m
W=Fd
W=50Nx1.2m
W=60J
What is more than one simple machine working together called?
Complex machine
What kind of wave is light?
Electromagnetic wave
What is the colored part of our eye called?
The iris
What is the difference between kinetic energy and a potential energy
Kinetic energy is movement energy where potential energy is stored, possible energy
What is the equation to find work?
W=Fd
Work= Force(in Newtons) times distance (in meters)
What is the equation for efficiency?
Wout
___ x 100%
Win
What is the difference between transparent, translucent, and opaque?
Transparent- allows almost all light to go through clearly
Translucent- Allows light through, but forms a blurry image
Opaque- Light does not pass through this
Explain what the cones and rods of our eyes do
Cones allow us to see color
Rods help us see in the dark
Where does geothermal energy come from?
Geothermal energy taps into the Earth and uses heat that is coming from inside the Earth
What states that energy can be transferred from one form to another, but it cannot be created or destroyed
The law of conservation of energy
Daily Double! 1000 points. List all 6 types of simple machines and provide an example where you would find each
Screw- on a desk, car, bookshelf
Wedge- Scissors, knife, axe
Inclined Plane- Ramp to a building
Lever- desk, door hinge
Wheel and axle- car
Pulley- Weight lifting machine
Explain what happens in the outer, middle, and inner ear
Outer ear- sound waves are collected in the ear
middle ear- Sound waves are amplified
Inner ear- Sound waves are converted to signals to be sent to the brain
Explain what happens to the pupil when it goes from light to dark and back to light
When the pupil encounters bright light it will shrink down because it will not have to work as hard.
When you go into the dark the pupil has to work harder so it will expand in size