Science - Earth Science
Standard 4 Objective 3
2 class periods of 60 minutes each
This lab is a "station" lab where students move from one small experiment to another. There are seven stations dealing with properties of sea water.
Note: you may want to set up more that one set of materials at each station so that groups can be smaller.
Time Needed: 110 minutes, including time for discussion and for students to answer analysis questions.
This activity demonstrates a variety of sea water properties. Density is addressed by station 1, 4, 5, and 6. The ocean is a layered system with the coldest, saltiest water at the bottom because it is most dense.
Station 2 illustrates a property of salt water that is meaningful in polar areas. Water with salt in it has to be much colder for it to freeze.
Station 3 shows how water pressure increases with depth.
Station 7 shows that waves do not move water but wind does.
Station 1: Set up two stations for this one. Place them on a counter near a sink. Have the hot plate nearby to heat the red water in a large beaker. Students should perform the experiment in the pie plate or cookie sheet so that if they spill, it doesn't go anywhere. Stream tables can be used also but are harder to empty.
Station 2: Set up two stations. The thermometers should be in the ice in labeled cups. Add quite a bit of salt to cup #2.
Station 3: Set up two stations. Needs to be next to a sink so students can fill the bottle with the tape on and then rip the tape off so that the water goes in the sink. The liter bottle needs to be prepared by melting with a hot nail 4 or 5 holes up the side so that a single piece of tape can cover them.
Station 4: Set up 3 stations for this one because it is the most time consuming. The solutions need to be available and students will need a disposal beaker when they are done.
Station 5: Set up two stations of this one because it doesn't take long.
Station 6: Set up two stations and have a bucket for disposal. A Styrofoam cup will keep the red ice frozen for the period.
Station 7: Set up two stations and do not give students many of the paper circles at a time. They tend to waste them.
Students complete each station personally……………………………….4
Students record data accurately…………………………………………….4
Students correctly answer analysis questions……………………………4
Lesson Design by Jordan School District Teachers and Staff