Thermometers are used to measure the temperature of things. They are often used to measure the temperature of the human body, but they can also be used to measure the temperature of the air, water, or other objects.
You can make your own thermometer at home with a few simple materials. Here’s what you’ll need:
- A clear plastic bottle
- A straw
- Rubbing alcohol
- Water
- Red food coloring
- A marker
- Modeling clay or tape
Instructions:
- Wash the bottle and straw thoroughly.
- Fill the bottle about 1/4 with water.
- Add an equal amount of rubbing alcohol to the bottle.
- Add a few drops of red food coloring.
- Insert the straw into the bottle so that it is about 1/2 inch from the bottom.
- Secure the straw in place with modeling clay or tape.
- Use the permanent marker to draw a line on the outside of the bottle where the liquid level reaches.
Now you have a working thermometer! You can use it to measure the temperature of different things, such as the air, water, or food. Just watch the liquid level rise or fall. The higher the liquid level, the warmer the temperature.
Making a homemade thermometer is a fun and easy science experiment that you can do with your friends or family. It is a great way to learn about temperature and how thermometers work.
