WAVES
A student wants to know if the weight of cart affects its speed at the bottom of a ramp. If he changes the weight of the car by adding different number of marbles, and he can change height. What should he change for what he wants to compare?
The number of marbles and keep the same height!
Angle of Incidence = Angel of Reflection
Drawing should look the same
What are the three most important steps in an investigation?
repeating, experimenting, reporting results accurately
A wet shirt will dry when it is left in the sun. Which process occurs to make this happen?
Evaporation
From the top of hill rolling to the bottom of the hill
A person is in a dark room and can clearly see the kids playing outside through the window. But a person cannot see the person inside. Why?
There is NO light being REFLECTED into your eyes
Sound waves and light are similar in what way?
Both sound and light waves change speed in different materials
water transfer heat to the ice
What energy occurs in a rubber band when is it is stretched and let go?
POTENTIAL TO KINECTIC ENERGY
What energy transformation occur in an electric fan?
____-->________-->_______-->
heat energy, mechanical, and sound energy only
How is light absorbed in a blue shirt?
all colors are absorbed except blue because it is reflected
Why do rainbows form after a shower rain?
Because raindrops act as a prism and separate white light in sunlight
Why does the leaf of a plant look green?
all colors absorbed and green light is reflected?
A boy is skating board up a hill where he speeds up going down the hill. What is the energy transformation?
Potential energy into kinetic and thermal energy
Which object can convert energy into mechanical energy?
Kerosene Heater
blender
Oven
Blender
Gas
Why do we see lighting before we hear thunder?
because sound travels slower than light
Becky is desining an experiment to determine if temperature effects the amount of sugar that can be dissolved in a glass of tea. What is the independent variable?
temperature
A student rubs the palms of their hands together. What is the energy transformation? (3)
chemical--> Mechanical--> heat
What is the energy transformation that occurs in solar panel?
____-->____
radiant to thermal
A student wants to know if the weight of cart affects its speed at the bottom of a ramp. If he changes the weight of the car by adding different number of marbles, and he can change height. What should he change for what he wants to compare?
The number of marbles not the height
What is the difference between electromagnetic spectrum?
wavelength
What violates the law of conservation of energy?
a ball dropped
A block sliding
A child playing on a swing
A block sliding
What happens to the light rays from the sun when it is going into Earth?
Absorbtion or reflected in the atmosphere
What is the energy transformation wind turbine?
_____--->_____
Solar energy---> mechanical energy