Layered Liquids

★What do you think would happen if various liquids are poured into a cup?

★Time: 30 minutes (including set up and cleaning up)

★Cost: $3 (However, you could find most of the materials at home)

★Area of Science and Topic: General Science

★Learning Objectives: Students will be able to learn which liquid has the most density and which has the least.

★Materials:
1. a cup
2. dish washing soap
3. corn syrup
4. honey
5. ethyl alcohol
6. vegetable oil
7. food coloring (optional)
8. Water

★Procedure:
1. First, get all materials needed.
2. In order, pour the following liquids into the cup.
   i. honey
   ii. corn syrup
   iii. dish washing soap
   iv. water
   v. vegetable oil
   vi. ethyl alcohol
3.See what happens!
4. Don't forget to clean up your area when you are done.

★Tips: To get the kids more involved, let them pour the liquids.
Don't pour in the liquids too far/high from the cup.

Bubble Bomb

Materials:

l  water

l  measuring cup

l  zipper-lock plastic bags

l  paper towel

l  tablespoon

l  baking soda

l  vinegar

Procedures:

Step 1- Figure out where you want to explode your Bubble Bomb. Sometimes the bags make a mess when they pop, so you may want to experiment outside.

Step 2- Tear a paper towel into a square that measures about 5 inches by 5 inches. Put 1 1/2 tablespoons of baking soda in the center of the square, then fold the square as shown in the picture, with the baking soda inside.

Step 3- Pour into your plastic bag:

l  1/2 cup of vinegar

l  1/4 cup of warm water

Step 4- You need to drop the baking soda (in the paper towel) into the vinegar and zip the bag closed before the fizzing gets out of control.

Step 5- Shake the bag a little and stay away from it!!!

Water Fountain

★Let's make our own water fountain!

★Time : about an hour (including setup and cleanup) 

★Cost $: suppose to be $0, if every materials are in the home.

★Area of Science and Topic: General Science / Physics 

★Learning objectives (what kids should learn as a result of performing this experiment): Students will learn about the movement of air.

★Materials: 
＊3 transparent plastic bottles
＊straws that can be bent
＊strong tape
＊a cutter and a pair of scissors (to make a whole and to cut) 
＊glue gun

＊water

★Procedure: 
1. Stick bottoms of two bottles together.


2. Cut the bottles in half. Upper half of this bottle is not used, so you can throw it away.


3. Make two hole on the lower half of the bottle we just cut so that straws can pass through. Do not glue them yet!


4. stick the cut bottle to a side of the other bottle in procedure 1.




6. Make a hole below the attached bottle. (upper bottle)


7. Make another hole on the lower part of the bottle. (lower bottle)


8. Connect the bottles with straws and glue them.

9. On the other side of the bottle, like the way we did, make holes on the upper bottle and the lower bottle and connect them with straws and glue them.

10. Fill water in the upper bottle. (not so much that water comes out of the straw)

11. Pour water in the cut bottle and observe the water coming out!


★Tips for making the experiment work best with kids: 
 - Using a glue gun needs careful attention.



 - The holes must be glued carefully that there is no leaking of air or water.

Why does it float?

 ★ If you drop an egg into water, egg usually sinks to the bottom, but what if you add salt into water? The egg will start to float slowly. This experiment can be explained by the differences in density. When you add salt into water, then salt water becomes denser than the normal water. And denser water is floating goods easier than normal water. This can be also found in real life, which is sea water. Seawater makes you to float easier in river or lakes.

★Time: about 5minutes (set up and cleaning included)

★Cost: $0 (if you have all the materials and water in the house)

★Area of Science: General Science

★Learning Objectives: Students can understand the differences in density of liquids.

★Materials :

1. One egg

2. Water

3. Salt

4. A Tall Drinking Glass / Transparent water bottle

★Procedure:

1. Pour water into the glass.

2. Gently drop an egg into glass and watch what happens

3. Stir in lots of salt (about 6 tablespoons). Be careful not to break egg.

4. Watch what happens to egg.

 ★Tips to make kids most successful in this experiment

1. Remove egg from the water cup before you stir salt into water.

2. Make sure not to use broken eggs.

3. Both raw and hard boiled eggs are fine.

http://www.sciencekids.co.nz/experiments/floatingeggs.html

(Similar experiment in same concept but not the same experiment)