To be or not to be, that is the Circuit
A team of Fantastic scientists separately connected two light bulbs separately to a closed circuit. Bulb A had an intact filament while Bulb B had a broken filament.
Explain why Bulb A lit up, but not Bulb B.
The filament in Bulb A is a closed circuit.
The filament in Bulb B is broken, it is an open circuit.
In the class lab we used golf balls on the board to show energy transfer. When we pulled a ball back and released it what happened to the energy?
The energy transferred from the moving ball to the one it hits, which transfers energy to the next ball, and so on until the last ball is pushed to the right.
Conduction
Plastic Straw
Nah, this is an insulator.
Stops Electrical flow, NO energy transfer
I can conduct investigations to explore the patterns of ___?____
hint: A push or pull that causes an object to move, stop, or change direction
Force
Complete this Circuit;
------_closed switch_ -------(light bulb)
Energy source (Battery)
Some Fantastic 4th graders attempted to roll a ball across a metal surface, grass, and sandpaper.
What would accurately describe the motion of the ball?
The ball will roll at a faster speed on the metal surface because there is less friction.
What is the HEAT flow direction?
Hot-->Cold
Paper clip
yes!
I can investigate & identify ___?____, by objects in motion, by waves in water, & by sound.
Transfer of Energy
A battery connected to rubber insulated metal wire connected to a lit light bulb will illuminate a room.
True
A baseball bat hits a baseball.
What is the correct energy transfer?
light-sound-waves-object motion-electrical
Object Motion
Some Fantastic 4th scientists heats four different materials up to 100*C to determine which material is the best thermal insulator. The data shows temperature change after 15 minutes,
material 1 drops to 73*C
material 2 drops to 90*C
material 3 drops to 94*C
material 4 drops to 62*C
The best thermal insulator is, material 3
Rubber insulated, copper wire
Yes
I can identify ____?____ and ___?___ of thermal energy & electrical energy
hint: allows/resists
Conductors and Insulators
If a Fantastic scientists were to observe a circuit with a battery, a bulb and an open switch, all connected with insulated metal wires. This electric circuit be completed by ______
Closing the switch
A tuning fork is a device made of steel. It has two prongs. When someone holds the handle and strikes the prongs, it causes the tuning fork to vibrate and produce a sound.
What would you observe if someone struck the prongs of a tuning fork and then placed the prongs into a bowl of water?
The sound waves coming from the vibrating tuning fork would transfer energy to create visible waves in the water.
Energy transfer pathway.
Energy Source (Chemical energy/Battery)---Pathway (copper wire circuit)---Toaster (receiver appliance)------- Pop Tart receives ____?_____ (Final transfer)
Thermal Energy, Radiation
FANTASTIC DOUBLE!!
Thermal Conductivity: A Great Absorber, But a Poor Conductor is__?____
hint: 1 oxygen 2 hydrogen
WATER!
Water molecules are held together tightly by hydrogen bonds, meaning they love to absorb and hold onto heat energy rather than pass it along to neighboring molecules.
I can demonstrate and describe how ___?___ ___?___ travels in a closed path that can produce light energy and or produce thermal energy.
Electrical Energy
Trace the wire circuit path.
Switch1 open---Switch2 closed---light bulb off---buzzer sounds
Will the light bulb illuminate and or buzzer go off?
Only the buzzer has a completed circuit.
The buzzer will go off, because it is on the switch1 pathway
Imagine a rock skipping across a pond. What do the ripples in the water demonstrate?
When the rock hits the water, some of the energy from the moving rock is transferred to the water. This causes it to move in ripples.
The weather outside is frightful and my hands they feel like ice molds... Rubbing them together makes them not so cold because...
Mechanical movement (rubbing hands together) creates friction. Friction converts kinetic motion into thermal heat energy in skin.
All of the following objects are conductors of electricity EXCEPT –
Aluminum Nail
Glass Marble
Copper Penny
Steel Fork
Glass Marble, good conductor of Heat
Describe Flow of Electrical Energy
Electrical Energy: energy resulting from the flow of ___?___ through a conductor on a Closed Circuit pathway that allows an electric current to flow freely resulting in light energy or thermal energy.
Electrical Charge
Battery/Energy source