Introduction
Good morning! Today we are researching using the scientific method to determine whether an icecube would melt faster in fresh water or salt water. Tomorrow we will put our hypotheses and all of our research to the test in a lab!
- Ms. Zizzo
Task
- http://www.sciencekids.co.nz/videos/chemistry/icesnow.html Watch a video about snow in England. How does this information affect your prediction?
- http://science.howstuffworks.com/nature/climate-weather/atmospheric/road-salt.htm Salt lowers the _______ _________ of water. What temperature does the liquid need to be below to make icecream?
- https://www.brainpop.com/science/motionsforcesandtime/buoyancy/ What is density? What do we know about it?
- http://chemistry.about.com/od/howthingsworkfaqs/f/how-does-salt-melt-ice.htm If the temperature gets down to where the salt water can freeze, __________________________________________________. What happens?
- http://www.huffingtonpost.com/2012/12/26/salt-ice-burn-challenge-teens-video_n_2366619.html What is the danger of adding salt and ice together, to the skin? Why does this occur?
Evaluation
Now, take all of your research and put what you learned together. Will salt water melt an icecube faster, or will fresh water melt an icecube faster? Justify your answer.
Use the following format to help you create a hypothesis.
I think ________________________ because __________________________.