Flying Hovercraft

Flying Hovercraft

★Friction is the force that stops/prevents an object from moving on forever. In this experiment, we will find out how the hovercraft works with and without friction.

★Time: 15 minutes (including setup and clean up)

★Cost: $2

★Area of Science and Topic:Physics

★Learning Objectives: Students will be able to learn how objects move differently when either there is friction or no friction. They would also get to know more about friction.

★Materials:

1. CD

2. bottle

3. balloon

4. scissors or cutter knife

5. glue gun

★Procedure:

1. First, get all materials needed.

2. With the scissors, cut the top part of the bottle.

3. Glue the part of the bottle to the center of the CD with a glue gun like this:

4. When the glue is dry, pull the balloon over the bottle top like this:

5. Through the hole at the bottom of the CD, blow the balloon.

6. Try sliding the hovercraft on a smooth surface. Observe what happens.

★How does this experiment work?

When the balloon is blown, the air comes out through the hole at the bottom of the CD. The air pushes the ground, which makes the hovercraft float. When it floats, there is no contact between the ground and the CD, thus there is no friction. When friction is not present, an object moves faster and smoother. As the air from the balloon is slowly used up the CD would also slowly land on the ground, making friction present. Eventually, the hovercraft would stop at rest.
Watch this video below and compare the movement of the CD with the balloon and the CD without the balloon. How is the presence of air(balloon) related to the presence of friction in this experiment?

★Tips for making the experiment work best with kids: 

Ask an adult for help when using the glue gun.

So that the kids could have some fun, let them blow the balloon.

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.

Color Changing Milk

Color Changing Milk

★Time: takes around 5 minutes

★Cost: around $5~6

★Materials:

 

- Milk (whole)

- Dinner plate

- Food coloring (red, yellow, green, blue)

- Dish-washing soap (Dawn brand works well)

- Cotton swabs

★Area of Topic : Chemistry

★Learning Objectives:

  Students can learn about chemical reaction.

★ Procedure

1. Pour some milk in the dinner plate.

2. After pouring some milk, add one drop of each of the four colors of food coloring in the center- red, yellow, blue, and green.

3. Put drop of liquid dish soap on the tip of the cotton swab.

4 And touch the surface of the milk (in the middle) with the cotton swab and hold it there for 10 seconds and see what it happens.

★Explanation:

How does it work?

Milk is mostly water but it also contains vitamins, minerals, proteins, and tiny droplets of fat suspended in solution. As fats and proteins are sensitive to changes in the surrounding solution when it adds the soap, it weakens chemical bonds that hold the proteins in solution are altered. Therefore, the food color molecules are bumped and shoved everywhere.

There's another reason the colors explode the way they do.

 http://liferaydemo.unl.edu/c/document_library/get_file?uuid=4c050aa6-f073-4475-8235-feb704ffc1c8&groupId=313877&.pdf

Making organ? Not difficult

Have you wondered about how we can breathe? This experiment is going to show you how we breathe in and out.

Time: 10~15minute

Cost: 200peso

Area of Science and Topic: Pressure and heat

Learning objectives: Mechanisms of the body parts, pressure

Materials: Knife, 1.5L plastic bottle, clay, Straw, balloon

Procedure:

1. Cut plastic bottle into half
2. Put two straws in the bottle through the opening and close the gap with clay
3. On the other side of straw, attach two ballons.
4. Cut one ballon in the half.
5. Stretch the half piece of ballon and tie the bottom of the bottle
6. Stretch the bottom piece of the ballon and you will find two ballons blowing up

Why does this happen? Basically, as ballons and clay covers the openings of the bottle, the bottle becomes air locked.this means that the oxygens can niether get inside or come out. If the half piece of the ballon gets stretched, the space inside the bottle increase and more volume will be requied inside. As a result, more volume will be required. Thus the two ballons attached to ballon will suck air to fill the space inside the ballon. Like the human body, the ballons which fuction as lungs will blow bigger.

★Tips on the experiment
Do not let the kids use the knife when cutting the bottles.

Accompanying worksheet