Brief Lesson Plan Essay examples
How to Make a Homemade Thermometer
This project is really interesting and fun; however, it does need close adult supervision to complete it. This is a really fun addition to a homemade weather station!
Rubbing alcohol (do not drink this)
Clear, narrow-necked plastic bottle (11-ounce water bottles work well)
Clear plastic drinking straw
1. Pour equal parts of tap water and rubbing alcohol into the bottle, filling about 1/8 to a 1/4 of the bottle.
2. Add a couple of drops of food coloring and mix.
3. Put the straw in the bottle, (DO NOT DRINK MIXTURE) but don't let the straw touch the bottom.
4. Use the modeling clay to seal …show more content…
What To Do 1. Tie one end of the string to a chair or doorknob across the room from you. 2. Blow up a round balloon a couple of times to get it stretched out. Then blow it up and pinch the end closed so no air can escape. Holding the inflated balloon closed, have an assistant help you tape a straw to it. 3. Thread the straw onto the free end of the string. Hold the string taut and then let go of the balloon.
The air in the balloon is gas under pressure. The air pushes against the balloon, causing it to expand, but the balloon is also pushing back on the air. When gas or liquid is under pressure, it tries to escape. In the case of the balloon, it escapes out the open end. In a rocket, it escapes through an opening called a nozzle. As the gas escapes, it creates the thrust that propels your rocket forward (or a real rocket upward). This is because of one of Newton's Laws of Motion: for every action, like gas escaping from a rocket in one direction, there is an equal and opposite reaction, like the rocket moving in the other direction.
To do some more experimenting with your simple balloon rocket, test how far it will go with different amounts of air: full, half full, a quarter full, etc. (You can measure the actual volume of air inside the balloon by using a