Particle Theory of Matter- Convection

When particles are heated the distance between the particles increases. This means that objects will expand. When liquids or gases expand they become less dense. A gas or liquid which is less dense will rise through a more dense gas or liquid. This explanation for the well-known tendency of hot fluids to rise and cold fluids to sink. Scientists call this process convection.

Aim: To observe convection in a liquid.

Equipment:200 mL beaker, water, tweezers, a crystal of potassium permanganate, a drinking straw, Bunsen burner on a heat mat, tripod and gauze mat.

Method:

1. Set up a Bunsen burner on a heatproof mat. Put the gauze mat on the tripod but leave it just to one side of the Bunsen burner.

2. Fill a 200 mL beaker with 150 mL cold water.

3. Place the beaker on top of the tripod and gauze and allow it to settle for a few minutes.

4. Carefully insert a drinking straw down one side of the beaker, ensuring the straw is touching the bottom of the beaker. Be careful as you do not want to disturb the water too much.

5. Using tweezers, drop a crystal of potassium permanganate down the inside of the straw. Wait for the crystal to settle on the bottom of the beaker.

6. Very gently, so to not disturb the water, remove the straw.

7. Light the Bunsen and side it under the tripod so that you are only heating the outside of the beaker where the crystal is. Observe.

Here is the image that I took...And video...Umm sorry, I can't upload the video of it cause it's not working like the file is too big...

So this is the image and setup and you can't really see where is the Bunsen is like the flame of it it's behind the beaker it should be at corner but not all the way at the corner...  

What I'm I learning??

I'm learning about experiments and how to do experiments learning about different types of experiments.

What did I improve on??

I improved on doing experiments and on my blog as well I think I'm getting better at blog and science If I'm a better comment to me and tell me what do you guys think.

What I'm I wondering ??

I'm wondering what kind of chemicals are there in the science lab what are different types of chemical I know some but not all.

I hope you guys like my blog and pretty much understand my writing as well If you don't tell me I mean comment down below and tell me what to improve more... BYE :)