Unit 2 Lesson 1

Question 1

Energy

Answer 1

The ability to cause change
There are 2 types of energy: kinetic energy
potential energy

Question 2

Kinetic Energy

Answer 2

Energy that is due to motion

The amount of kinetic energy depends on its mass and speed.
It increases as the mass increases
It increases as the speed increases

Question 3

Potential Energy

Answer 3

Energy that an object has due to its position, condition, or chemical composition

Question 4

What are the forms of energy?

Answer 4

Mechanical Energy = kinetic energy + potential energy

Sound Energy = kinetic energy caused by vibration of particles in a medium such as steel, water, or air

Electromagnetic Energy = energy transmitted through space in electromagnetic waves. Examples: x-rays, microwaves, sun

Electrical Energy = energy that results from the position or motion of charged particles . Examples: lights

Question 5

What are the forms of energy? (Continued)

Answer 5

Chemical Energy = a form of potential energy which is stored in the bonds between atoms.Depends on the kinds of atoms and their arrangements
Example: batteries, matches, food

Thermal Energy = the kinetic energy of the particles in an object. The faster the molecules move, the more thermal energy. The more particles you have, the more thermal energy.

Nuclear Energy - comes from the nucleus of an atom. The energy from the sun is nuclear energy

Question 6

Energy Transformation

Answer 6

When energy changes from 1 form into another form

Question 7

Law of Conservation of Energy

Answer 7

Energy cannot be created or destroyed. It only changes form

Question 8

Heat

Answer 8

The energy transferred from an object at a higher temperature to an object at a lower temperature

Question 9

Closed System

Answer 9

A group of objects that transfers energy only to one another