Science

Aim: To

Method:
1. Set up and light a Bunsen burner
2. Smear a small amount of petroleum jelly on to the head of each drawing pin
3. Attach the drawing pins at even intervals along the length of the metal rod
4. Clamp one end to the metal rod to a retort stand
5. Position the retort stand so the unclamped end of the metal rod is in the Bunsen burner flame ans start the stopwatch
6. Record the time it takes for each pin to drop in the table below.

Discussion:
When we heated one side of the metal it started vibrating along the ling of pins. The Vibration was coming from the strong particles that are along the line of pins. After it would be transferred all the way to the end which made all of the pins fall down.

Results:

Science

Aim: To observe water as it changes state from solid to liquid and then to a gas.
Method: 
1. Collect enough ice so the your beaker is half full and place the thermometer into it while you set up the rest of the equipment.
2. Set up the retort stand and clamp alongside the tripod and gauze mat.
3.Place the beaker of ice on gauze mat and gently clamp the thermometer so that it is held upright and easy it see. The bottom of your thermometer should be low enough to still be covered by water when the ice melts, but not touching the bottom of the beaker.
4.Record the initial temperature of ice in the data table below.
5. Light the Bunsen burner and start timing with the stopwatch.
6. Measure and record the temperature every minute.
7. Continue measuring and recording the temperature until the water has been boiling for 2 - 3 minutes.

Discussion: The Ice is a solid and the particles are only slightly vibrating. Once the heat energy got in contact with the ice, the particles started to heat up as it melted. The ice melted into a liquid and once it reached about 110 in temperature (c) it boiled quickly. Before that it steamed up a bit before the boiling point. It boiled within 11 minutes approx.

Results:

Science

Aim: To observe diffusion in a liquid

Equipment: Petri dish, water, tweezers, a crystal of potassium permanganate.

Method:

1. Half fill your petri dish with cold tap water
2. Place the petri dish on your work bench and allow the water to become settled.
3. Using the tweezers, place a single crystal of potassium permanganate in the center of the petri dish.
4. Observe for 5 minutes.
5. Repeat the experiment using hot water.

Results: 

Observation: When we put the crystals in the water its slowly changed the colour and then would make the whole water purple. We did it with cold water and hot the cold one took longer to dissolve. The solute was the potassium permanganate and the solvent was the water.