Objectives:

State Performance Indicator 0507.9.3  Describe factors that influence the rate at which different types of material freeze, melt, or evaporate.

State Performance Indicator 0507.Inq.1 Select an investigation that could be used to answer a specific question.

*Factors that influence the rate at which different types of material freeze, melt, or evaporate include surface, heat, and volume.

**Start with a question about one of the factors listed above.  Design a simple investigation that would answer the question.  Complete the experiment and write a report.  Your report should have the same parts as the one we did together on page 64 of your science notebook. Write your report neatly on a piece of notebook paper that is not crumpled, folded, or has the holes torn out. We will share and display these. You should be able to get the report on one side of the paper, but if you need more room use a second piece of paper.  Do not use the back.

***You may select one of the following simple and easy ideas.

1. To investigate heat, put two pieces of ice in separate containers. Leave them in two different places that have different temperatures and see how long it takes each piece to completely melt.  You might put one in the house and one outside, or you could put one under a light.  Be sure to find out the temperature in your house and outside and include these in your report.

2. To investigate surface, use two different containers.  One should have a narrow opening and one a wide opening. Put the same amount of water in each and place in the freezer. Observe to see how long it takes each one to completely freeze.

3. To investigate volume, use two containers that are exactly alike.  Put different amounts of water in each. Place them in the freezer and observe to see how long it takes each one to completely freeze.

****Be sure to keep all conditions the same in your experiment except the one factor(variable) that you are investigating in your question.  Measure amounts with measuring cups or spoons.  Use a clock or watch to measure time.

*****Are you creative?  You may design a different investigation than the ones listed above. Be sure to keep it simple.  Also, you must follow the rules listed below.

Students may not use the stove for any reason. If a student wants to investigate a question that involves boiling water, an adult parent or guardian must conduct the experiment while the student watches. NO EXCEPTIONS!

Students may not use liquids that are not edible.  For example, a student cannot investigate liquids such as rubbing alcohol or ammonia. The investigation shown on page 290-291 of the textbook is interesting, but it is only acceptable if an adult parent or guardian is present and helps conduct the experiment.  NO EXCEPTIONS!