Magnetism
____ = 0.5 x m x v x v
What is kinetic energy?
This type of energy is stored energy, such as energy in a stretched spring or a battery.
What is mechanical potential energy/elastic energy?
This is the factor that the scientist purposely changes in an experiment. (I change)
What is the independant variable?
True or false: Potential energy increases as an object gets closer to the ground
What is False? Potential energy increases when height increases
When a toaster is plugged in, electrical energy changes mainly into this type of energy to toast the bread.
What is thermal energy?
This is the factor that is measured or observed in an experiment. (changes and is measured)
What is the dependant variable?
This region around a magnet is where magnetic forces can be detected.
What is a magnetic field?
The gravitational acceleration constant?
What is 9.8m/s2?
In a moving car, chemical energy from gasoline transforms first into this type of energy that makes the car move.
What is mechanical/motion energy.
These are the factors that must be kept the same to ensure a fair test.
What is controlled variables?
This type of magnet is created when electricity flows through a wire.
What is an electromagnet?
If you double an object’s speed, this happens to its kinetic energy
What is quadruples (x4)?
When you turn on a lamp, electrical energy transforms into these two forms of energy.
What is light/radiant energy and heat energy.
If a scientist tests how sunlight affects plant growth, the amount of sunlight is this type of variable.
What is the independant variable (I change)?
How can magnets help to convert electric energy into motion energy in a motor?
What is permanent magnets and electromagnets interact to spin an axel converting the electricity from the electromagnet into motion energy.
Calculate the kinetic energy and potential energy of a 8kg ball that is 6m off the ground, traveling at a velocity of 12m/s.
What is kinetic energy of 576Joules and potential energy of 470.4joules?
A skateboarder standing still at the top of a ramp drops in, rolls down, and slows to a stop because of friction. During this ride, energy changes from this type at the top, to this type at the bottom, and finally some of it changes into this type because of friction.
What are potential energy, kinetic energy, and thermal (heat) energy?
FINAL JEOPARDY:
A group of students wants to investigate how the color of a surface affects how much heat energy it absorbs from a lamp.
They place one black piece of paper and one white piece of paper the same distance from a heat lamp. Both papers are the same size and thickness. A thermometer is placed on each paper. The lamp stays on for 10 minutes, and the students record the temperature of each paper every 2 minutes.
Identify the:
Independent variable, Dependent variable,Controls
Correct Response:
Independent variable: What is the color of the paper?
Dependent variable: What is the temperature change (amount of heat absorbed)
Constants: What are the distance from the lamp, size of the paper, type/thickness of paper, same lamp, same time under the lamp (any two)?