Water Soluble Science
Students will be able to investigate and identify some solids that dissolve in water.
Introduction (5 minutes)
- Explain to the students that they will be mixing some solids with water today.
- Write the word "dissolve" on the board, and ask them if they know what it means.
- Explain the meaning of dissolve, a solid being incorporated into a liquid, to the students.
- Ask the students if they know of anything that dissolves in water.
Explicit Instruction/Teacher Modeling (5 minutes)
- Ask the students to come together so that they can watch your demonstration.
- Show the students a cup of water and tell them you are going to put some pepper in it.
- Make a prediction if the pepper will dissolve or not and draw it on chart paper in a fashion similar to how the observation worksheet is set up.
- Put in the pepper and stir.
- Record your observations on the chart paper.
Guided Practice/Interactive Modeling (10 minutes)
- Repeat your test with with a different solid of your choice.
- Ask students to make a prediction and draw it on the chart paper.
- Have a student put the solid in the water and stir.
- As a class, discuss the result and record it on the chart paper.
- Tell the students that they will now get to do this experiment with 4 different solids in small groups.
Independent Working Time (15 minutes)
- Put the students in small groups and ask them to make and draw their predictions first before mixing.
- Remind the students to take turns putting in the solids and to not taste the solids.
- Hand out the To Dissolve or Not Dissolve worksheet and containers of solids to each group. Cups with water can be filled before class and set aside for the experiment.
- Tell the students to begin the experiment.
- Walk around the classroom to assist and have conversation with the students about their discoveries.
- Have the students make sure their solids are back in their containers at the end of the experiment.
- Enrichment: To challenge students, give them additional solids such as powdered milk, flour, rice, and coffee beans.
- Support: Get the students to test a smaller number of solids.
Assessment (5 minutes)
- Listen to the student conversations and check their results of the experiment.
Review and Closing (10 minutes)
- Bring the students back together and go over the results they got.
- Ask them if there were any surprises.
- Ask them if they have any unanswered questions and write them down for use in a future experiment.