Water Cycle: Ocean Deep

• Difference between the salt water and fresh water
• Discovering the properties of salt water
• Looking into Oceans, Sea and Lakes

Salt Water vs.. Fresh Water

Majority of the Earth’s water is in the oceans but the water here is not pure.  Ocean water contains components and elements that have been dissolved in the water through time (water eroded the Earth’s surface). 

From here, I started to discussing why water in the ocean is called salty water and those in the lakes are called fresh water.  Note that the term “fresh water” can be misunderstood.  Water in the ocean is not good for humans as it is salty.  Too much salt in our body is not good because the body cannot take it out.  Same thing as water in the lake, though it may be called “fresh” or may look clear, it may still  have something in it that can be dangerous to our body.

Seen below is our “salty” water mixture.  It’s made up of clean warm water, plenty of salt and a blue food colouring for the ocean effect.

Create a salty water mixture as mentioned above and let them taste the salty water and the freshwater for comparison.

Properties of Salt Water (Ocean)

Around 70% of the Earth’s surface is covered by seawater (water, salt, and other substances and gases).  Seawater is more dense, meaning if you mix salt and fresh water without mixing, the salt water will stay UNDER the fresh water.  Other amazing facts about sea water includes:

• Easier to swim in salt water because it helps to keep our bodies higher in the water.
• It needs more heat to boil and more cold to freeze

To demonstrate this, we conducted a few experiments to see first hand the properties of salt water and fresh water.  Click on the image below to see our experiments!

 

Investigating Oceans, Sea and Lakes

Using our printed and painted map, we identified four major ocean bodies:  Indian Ocean, Atlantic ocean, Pacific Ocean and Arctic ocean. 

 

Also, we revisited our study of organisms that live in salt water and the fresh water and a refresher of our landforms (an island is part of the Earth, it doesn’t float in the water LOL).

Animals in the freshwater ecosystem: lakes, ponds and streams. Animals in the marine ecosystem which includes the seashore, temperate and tropical oceans.

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Simple Experiments: Sinker!

Objective:  This experiment was conducted to determine how density affects water movement. 

Sinker!

1.  Prepare your  materials: salt, 200ml of warm water for your salty ocean water and a half filled clear water (representing freshwater).

2.  Create a mixture of salty water for your ocean.  Make sure that your water is warm enough to dissolve all the salt.  Add more salt until it can no longer be dissolve in your water mixture.  Add food colouring, I used a blue colour to represent the ocean.

                        

3.  Pour your salty water in the bowl of clear water.

4.  Observe the bowl from the side as you pour the water (as your helper pour the salty water). 

                      

As you can see the coloured salty water sinks to the bottom of the container, forming waves under the clear water above it.  The salty water (ocean) is more dense than the clear water it will stay under the clear water.

Floater!

Now another experiment we performed was to test how the water density affects the ability of an object to float.  This case, we prepared another salty water (in a big bowl) and a clear water in a separate bowl.  We used a boiled egg, as our test subject.

Drop the egg in the bowl of clear water.  It sank into the bottom of the bowl right away.

Now we tested the same boiled egg in a bowl full of salty water.  Once dropped,  it sank for a second but then it started to float afterwards!! Mavi was in awe!!

 

In this case, it easier for humans to swim in the ocean because of the higher density of the salty water helps to keep our bodies higher in water :) 

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FREE Stamp Game Sheets

Like my Stamp Game sheets that were used in our Static Addition and Dynamic Addition activities?  You can get your copy now by clicking the image below. Or by clicking this link.


For the first page, I printed it multiple times. Then, I cut it in the middle and created a booklet.  For the second page, we used it to practice writing numbers as seen in my Static Addition post.  And the last page, I randomly wrote a number and Mavi has to indicate the correct number of thousands, hundreds, tens and units.

Colorwheel Flowers

I came across this project at Deep Sparkle and decided to try this with Mavi.  I love how simple the project is and it uses basic colour combinations.  Since the project involves the colorwheel, Mavi and I revisited our basic art lessons about colours a few years ago. We talked about the primary and the secondary colours and how the are organised in a wheel type figure so we can easily remember the colour combinations.

                      

Read about colour theory I and colour theory II.

Mavi worked on the red, orange, green and yellow combinations, while I painted a blue-violet flower combination.  And here’s how they looked like after we added  black and white paint details.

The flowers turned out really good and the colours were vibrant! You can see these hanging in Mavi’s room as of the moment.

For the details of the projects, click this link from Deep Sparkle.

Linking to:

Montessori Monday
TGIF Linky Party
Teach Beside Me
Preschool Corner
Teaching Mama
I Can Teach My Child
Home + School = Afterschool!
Share It Saturday
The Natural Homeschool