Have you ever noticed that salt is sold in the store when we have snow and ice on the roads? If you have ever wondered about salt and what effect it has on water. If you put salt on the frozen ice in the road it seems to melt so does it keep water from freezing? You have just discovered a science project for the school fair.
Science projects are right under our noses and can be as simple to find as looking at what we do every day in our lives.
This experiment will not cost you anything except a little bit of ordinary table salt.
Get together 3 containers that you can put water into and freeze. They should be plastic that will freeze well. Also you do not want them to be too large. If you can use a sour cream container or a few small plastic cereal bowls that works well.
Fill each container half full with water from the faucet.
In the first bowl put in 2 teaspoons of salt and stir well to dissolve most of the salt In the second container put in 1 teaspoon of salt and stir to dissolve In the last cup only have water and no salt.
Make sure the water is room temperature.
Now place them all on a baking sheet and place in the freezer in a stable place that will not tip over.
Leave these there all day or over night. In the morning remove the containers and make a visual observation.
Were all the containers frozen solid? If not were they somewhat frozen? Did any not freeze at all?
Did the amount of salt in the water effect how much the water froze?
Make sure to document your information and take photos. This project is not a demonstration that you can do immediately at a fair but you can show what happened to the salt and water combination in the science project.
By: Lesa Bolt
Posts Tagged ‘Baking Sheet’
Kids Science Project for 7th Grade
April 30th, 2010Cool Science Experiments For Kids
April 9th, 2010
There are dozens of cool science experiments that you can do at home. Many cool science experiments require a day long process and careful observation. If you like weather there are a number of cool science projects you can try at home. Finding out what is in the rain is one of those experiments.
Experiment: Find Out What is in Rain
Category: Meteorology/Environmental
Materials:
Microscope
Container
Funnel
Tape
Pie Dish
Filter Paper
To begin this science experiment you will need to place a clean and completely dry container outside on a day that it is raining. Put the container out in the open away from trees and buildings and leave it there for several hours. Bring the container in after it has collected an adequate amount of rain for examination.
When you get the water inside you will need to filter the rain water. You can filter the rain water using a piece of filter paper in your funnel. Collect the water that runs through the filter and funnel in a separate clean dry container.
Next, you will need to dry your filter paper so that the water is evaporated from it. To do this quickly you can put the filter paper on a clean baking sheet in the oven for 15 minutes at 100 degrees Celsius. While you are waiting for your filter paper to dry out take the excess water you collected and pour it into the pie dish.
Once the water has evaporated from the pie dish and the filter paper you can find out what is in rain. Take your filter paper and look at under the microscope. Take a piece of clear tape and stick it to the bottom of the pie dish once the water has evaporated. Look at the tape under the microscope. Try to figure out what particles were in the rain you collected.
By: Dee Schrock
