Observing Convection 1
Equipment: 200 ml beaker, water, tweezers, a crystal of potassium permanganate, a drinking srtaw, Bunsen burner, heat mat, tripod and gauze mat.
Method:
- 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.
- Fill 200 ml beaker with 150 ml cold water.
- Place the beaker on top of the tripod and gauze and allow it to settle for a few minutes.
- 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 don't want to disturb the water too much.
- Using tweezers, drop a crystal potassium permanganate down the inside of the straw. Wait for the crystal to settle on the bottom of the beaker.
- Very gently, so to not disturb the water, remove the traw.
- Light the Bunsen burner and slide it under the tripod so that you are only heating the outside of the beaker where the crystal is. Observe.
Cold water:
Hot water:
No comments:
Post a Comment
To support my learning I ask you to comment as follows:
1. Something positive - something you like about what I have shared.
2. Thoughtful - A sentence to let us know you actually read/watched or listened to what I had to say
3. Something thoughtful - how have you connected with my learning? Give me some ideas for next time or ask me a question.
Note: only a member of this blog may post a comment.