Complete: The four parts of a circuit are: wire, energy source, switch and:
load
100
What energy transformer occurs in a battery when it is in a closed circuit?
Chemical energy produces electricity.
100
Give 2 examples of metals
[any 2 metals]
100
Name an energy transformer that produces electricity that is not a battery.
generator, solar cell
100
It takes 45 Newtons to rake the leaves a total distance of 20 meters. How many Joules (J) of work does it produce to rake the leaves?
900
200
The pathway through which electricity passes is a:
circuit
200
What part of a circuit acts as an energy transformer, changing electricity into other forms of energy?
the load
200
What type of material is a good conductor?
metal
200
Electricity is made of what particles?
electrons
200
The test model in the engineering process is called the:
prototype
300
What transformer uses electricity but does not use wires?
cow fan, flashlight
300
!!! DAILY DOUBLE !!!
When you wound a spool toy, what energy transformation occurred?
Mechanical energy --> Elastic energy
300
Name 2 more metals.
any 2 metals
300
What charge do electrons have?
negative (-)
300
There are 304 steps in the Leaning Tower of Pisa. How much work is done to climb them? [It takes 35 Newtons of force to climb a stair.]
10640 Joules (J)
400
Why does electricity not go through an open circuit?
The gap in the circuit prevents electrons from flowing.
400
Name two devices that do this:
Electricity --> Mechanical energy
fan, clock, computer, etc.
400
What is in all devices that do this?
Electricity --> Mechanical energy
electric motor
400
Students in Mr. Umfress' class worked as engineering groups to build a prototype. After modifying them, the prototypes produced this energy transformation:
Elastic energy --> Mechanical energy
What were the prototypes?
toy cars
400
What word means to change a prototype?
modify
500
Name all 4 parts of a circuit.
load, wire (conductor), energy source, switch
500
The eminent inventor Dr. Natalia Longoria built an experimental model that used two pieces of metal twisted together. One end of the model was placed into heat. The device produced electricity. p. 430
What energy transformation occurred?