RFMS Science: KE Calculations & Energy Impact Review Lesson

​Expectations (READ):
-You are to complete this Quizizz from the beginning to the end. If you do not complete it in class, you will need to have it completed by Friday. THIS IS FOR A GRADE.
-DO NOT SKIP SLIDES OR QUESTIONS.
-You are working on your own computer, and you are NOT on any other website. NO HEADPHONES. You may use your reference guides and a calculator if needed.
-If you happen to finish this Quizizz, you can work on CC 1, CC 2, CC 3, Profile of a Scientist, or Types of Energy/Transformations Practice.
-You should be on your BEST behavior. If your name is left in a negative way, it's a step! If your name is left in a positive way, you will like it! See you Wednesday (no school tomorrow)! Love you BIG! :)

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The energy an object has due to its motion is called kinetic energy.

• Mass is a measure of the amount of matter in an object. In Science, it is typically measured in kilograms (kg).

• The speed of an object is the distance the object travels in a unit of time. In Science, it is typically measured in meters per second (m/s).

• Kinetic energy is measured in joules (J).

• Velocity is another word for speed.

How to Square a Number: multiply the base by itself however many times the exponent says

Example: 3² (3 is the base, and the small 2 is the exponent) = 3 x 3 = 9
Example: 4² (4 is the base, and the small 2 is the exponent) = 4 x 4 = 16

​Exponents represent repeated multiplication.

Electrical Energy Impact:

• Electricity is the constant flow of electrons.

• There are two types of electricity: static and current.

• Static: an electric charge that collects or builds up on the surface of an object. Some examples are being shocked from a trampoline and lightning.

• Current: the flow of electric charges carried through a material such as a wire or other conductors. Some examples are power lines, computers, and appliances.

• Circuits are a path along which electricity moves.

• Simple circuits have three parts: energy source, wires (conductors), object it operates (load)

• There are two types of circuits: open and closed.

• Closed circuit: these circuits have a complete path to follow. There are no openings in the path. The result of a closed circuit is the load operates successfully.

• Open circuit: these circuits do not have a complete path to follow. The power cannot pass from the energy source to the load. The load will not operate with an open path.

• An electrical conductor is a material in which charges CAN move easily. Most metals are good conductors because some of their electrons are free to move around. Conductors are used to make wires. Examples of good electrical conductors: metal, copper, and silver

• An electrical insulator is a material in which charges CANNOT move easily. Insulators do not conduct charges very well because their electrons cannot flow freely. The electrons are held tightly inside an insulator. Examples of good electrical insulators: rubber, glass, and wood

• A switch allows two pieces of metal to touch and electrons to flow. Switches are used to open and close the circuit. A switch is only required to control the flow of energy; it is not required for a circuit to work successfully.

• Thermal energy can also be impacted by conductors and insulators.

• Heat can travel easier through thermal conductors, because these conductors allow the heat to travel throughout the object easily due to molecules freely moving. Examples of thermal conductors: metal, thermos, ceramic dish

• Heat does not travel as easily through thermal insulators, because these insulators do not allow the heat to travel easily due to the molecules being tightly compacted. Examples of thermal insulators: oven mitt, fleece/cotton jacket, Styrofoam cup

• Glass has the ability to be a thermal conductor or thermal insulator, depending on the temperature of the glass and the environment the glass in (example: glass baking dish in oven conducts heat, but as the glass cools, it insulates and keeps the food warm)