Online Science Class for Preschoolers: Looking Under Water

Today is the last lesson in my Online Science Class for Preschoolers.  I hope you have enjoyed it!  There are literally hundreds of activities you could do with each theme I touched on during the last few weeks...I hope you continue to explore and experiment with your preschoolers and toddlers!  Also, if you've been following along, I'd love to hear from you...I know you're out there because Google tells me so, but I would really love to actually hear from you.  Comments or emails are fabulous!  Each comment I get makes me even happier about all the time I've put into typing these lessons up!
WEEK 4: Oceans

Day 4: Looking Under Water
Overview: This lesson lets your child compare sea objects in the water and out of the water.  It appeals to the Verbal-Linguistic, Logical, Visual-Spatial, Bodily-Kinesthetic, Naturalist, and Intrapersonal intelligences.

  • empty metal can--about 10 ounces
  • duct tape
  • pliers
  • plastic wrap
  • big bucket or mixing bowl about 3-8 inches deep
  • outside objects like rocks and sticks
  • shells
  • seaweed
  • any plastic fish or other ocean toys
  • optional: real fish
  • Science Journals.  

  • Gather supplies.  
  • Empty and clean metal can.  Use can openers to remove both ends so it is a cylinder.  Use pliers to flatten any sharp metal edges.  Cover the edges with duct tape. 

Science Time!
  • Have you ever looked under water with your eyes open?  What was it like?  Water bends light, so things under water look different under water than in the air.  Today we're going to make an ocean scene and look at it under water!
  • First, let's put some water in the bowl.  Is ocean water salty?  Let's add some salt.  (You don't have to be technical, but if you're interested...seawater typically has about 3.5% salinity, which means it has 35 parts salts to 1000 parts water, so 8 tablespoons of salt {about 4 fluid ounces} mixed into a gallon of water {128 fluid ounces} is pretty close to real seawater.  Of course, if you look at seawater right where a river dumps fresh water into the ocean, the salinity will be much lower.)  If your child is interested, let her taste a little of the water by dipping her finger in the water and licking it.
  •  What shall we put in the ocean?  Let your child choose what rocks, sticks, shells, toys, fish, etc., to put in the "ocean" -- your big bucket or mixing bowl. 
  • Now, let's make a tool to look under the water.  I have this empty can, plastic wrap, and duct tape.  Help your child cover one end of the can with plastic wrap and use it to look at objects under the water.  Compare them to similar objects on the counter. 
  • Science Notebooks:  Draw or write about what we did today.