Question: Which material conducts heat  fastest?


Hypothesis:
I think that aluminum will melt the
wax first, then iron, and lastly glass.


Materials:
Gas cooker, candle, matches, thumb tacks, glass rod, iron rod, and  aluminum rod.


Procedure:
1. Melt wax onto rods and stick a thumb tack to each.
2. Place rods over  flame.
3. Wait and observe which tacks fall first.
 
Results:
1 minute 17 seconds
Aluminum

1st- Aluminum
2nd- Iron
3rd- Glass

We learned about circuits in class today. 

A circuit has to be a complete CIRCLE!

We even did an experiment:





Title: Bulb Brightness
Question: What happens when you add bulbs to an electrical circuit?
Hypothesis:
1. Some girls thought the bulbs would not work.
2. Some girls thought the bulbs would get brighter.
3. Some girls thought the bulbs would grow dimmer each time.

Materials:
4 Batteries
4 Battery Boxes
5 wires
5 light bulbs

Procedures:
1. Assemble an electrical circuit with batteries and two bulbs (record data).
2. Add a third light bulb to the circuit (record data).
3. Add a fourth light bulb to the circuit (record data).
4. Add the 5th and final light bulb (record data).

Results:
2 Bulbs: Both bulbs lit up. They were pretty bright. About a 5 in brightness (scale 1-10).
3 Bulbs: All three bulbs lit up, but they were dimmer About a 3 in brightness.
4 Bulbs: Bulbs lit up, but just barely. About a 1.
[4 Bulbs (2nd class): Only three bulbs lit up a tiny bit]
5 Bulbs: No bulbs lit up.
[5 Bulbs (2nd class): A very small amount of orange showed up on 2 bulbs.

Conclusion: The more bulbs that were added to the circuit, the dimmer it became.

VOCABULARY:

Bulb or light bulb

Filament: Some wire that lights up when energy is sent through the bulb

Battery: A source of energy used to create a circuit

Battery Box: The box around the battery that helps send the energy in the right direction.

Wires: the metal covered connectors

Dim: Less light
Bright: More light