Atoms
What is an atom?
The basic unit of matter
What subatomic particle is positively charged?
Proton
What is thermal energy?
Energy that is associated with temperature
What unit is used to measure energy and work?
Joules
What is energy transformation?
The change of energy from one for to another
Who was the first scientist to propose a model of an atom?
JJ Thomson
What is the charge of an electron?
Negative charge
What is electric energy?
Energy that is associated with electric charges
What does a Joule tell you?
How much energy is needed to perform work, stored in an object, and used to perform work
During energy transformation:
Energy is not created nor destroyed
What atomic model is most used today when studying atoms?
Rutherford-Bohr Model
What is the mass of a neutron?
1 atomic mass unit
Which form of energy is stored in food and fuel?
Chemical energy
Calories are most often used to measure:
The amount of tared energy food
A lamp converts electrical energy into:
Light energy
Is a proton negatively or positively charged?
Positively charged
What is the difference between a proton and an electron?
An electron is negatively charged, and it is on the outside of the nucleus. A proton is positively charged, and it is in the nucleus
What is the difference between light energy and sound energy?
Light is carried by light waves and sound energy is carried by sound waves
Calorie is used to raise 1degreeC of water = 1,000 calories
A calorie is used to raise 1degreeC of water
Describe the energy transformation that takes place when a windmill harness energy from wind to produce electricity.
Mechanical to electrical
(True or False)Electrons have zero charge
False
How does electromagnetic force hold an atom together?
It orbits the outside of the nucleus
What type of energy is carried by wind?
Mechanical energy
What is the difference between a Joule and a watt?
Joule=energy
Watt=power
Describe the energy transformation that takes place when a car burns gasoline to power its motion.
Chemical to Mechanical