WALT to be scientists and use the scientific process

We explored fresh water by looking at it, smelling, tasting, and feeling it.  Then we added salt to the water and did the same thing.  Then we compared the fresh water and salt water using a Venn diagram.  The only things that were the same were that they both are liquid and runny and cold!

                                                    



Question:

Then we wondered what would happen if we froze the fresh water and the salt water, so we set up an experiment.

Hypothesis:

12 of us thought the fresh water would freeze first.  12 of us thought the salt water would freeze first!

Experimentation:

We made the test fair because the only thing we changes was salt in one bottle.

We put the bottles into the freezer, and checked them every hour.  We recorded what we saw.

Conclusion:

The fresh water froze first.  We thought this might be because there is nothing extra in the water.

We also discovered that the salt water started to melt very quickly, and that icy condensation formed on the outside of the bottle.  The fresh water condensation was just water. The fresh water took all day to melt.

Come in and see all the photos of our experiment, and our recording in our Connected Curriculum books.