| td> | | | | between the water and the tissue any more, so the |
| Do you want your kids to love science? If so, make | | | | water reached the tissue and made it whet. |
| sure they do science fair projects kids will find fun. Kids | | | | The case of the airlock |
| will not be interested in projects that are not very | | | | After you have completed this, one of our science fair |
| visual and that are not very easy to do. They want to | | | | projects kids will love to do, you should be able to |
| see the results in a very short time; I've seen that over | | | | answer the following questions: |
| and over again with my little granddaughter Anabel. | | | | 1. What do you do when you seal the opening of the |
| She loses interest very soon if things are moving too | | | | bottle with the adhesive clay? |
| slow! | | | | 2. What happens when you pour the water in the |
| So, here is a science fair projects kids will find fun and | | | | funnel while the bottle is sealed? |
| easy. It actually is two experiments that can be done, | | | | 3. Why do you think it happens? |
| first the one and on the next day the other so it does | | | | 4. Why doesn't the air escape through the opening in |
| not take too long. | | | | the funnel? |
| Does air take up space? | | | | 5. Why do you keep the top opening of the straw |
| The case of the dry tissue paper | | | | closed at first? |
| After you have done this experiment you should be | | | | 6. What happens when you take away your finger |
| able to answer the following questions: | | | | after you have inserted the straw in the opening of |
| 1. How does the tissue paper feel after the first part of | | | | the funnel? |
| the experiment? | | | | 7. Why do you think it happens? |
| 2. What do you see when you turn the glass slightly? | | | | 8. What does it tell you about the properties of the |
| 3. What causes these bubbles? | | | | water as well as the air? |
| 4. What happens to the tissue paper now? | | | | What you need for this experiment: |
| 5. What do you think stopped the tissue paper from | | | | * A funnel with a short stem |
| getting whet the first time? | | | | * A bottle with an opening that the funnel fist snuggly in |
| 6. What was there between the tissue paper and the | | | | * Adhesive clay |
| water? | | | | * A straw |
| 7. Look around, is there air around you? | | | | * A jug |
| Can you see the air? | | | | * Water |
| What you need for your project: | | | | What to do: |
| * One tissue | | | | 1. Place the funnel in the bottle |
| * A glass | | | | 2. Seal the rim of the bottle with adhesive clay making |
| * A bowl | | | | sure it is completely sealed and no air can escape |
| * Water | | | | 3. Put the water in a jug and pour some of it into your |
| How to do this experiment: | | | | funnel and observe what happens. |
| 1. First you have to crumple the tissue and place it in | | | | 4. Now you take the straw and while keeping one end |
| the bottom of the glass making sure there is a | | | | closed with your finger, push it into the funnel. |
| relatively big space between the rim of the glass and | | | | 5. Remove your finger |
| the tissue. | | | | 6. Observe what happens now |
| 2. Now you have to turn the glass up side down and | | | | Conclusion: |
| submerge it in the water making sure you keep it | | | | The air in the bottle is trapped and prevents the water |
| completely vertical. | | | | from running into the bottle. No air can escape through |
| 3. Take the glass out of the water and feel the tissue. | | | | the water as the water molecules in the opening of |
| 4. Now do the same, but turn the glass slightly so the | | | | the funnel because of the surface tension in the water. |
| air can escape. | | | | (What is this?) When you insert the straw in the bottle, |
| 5. Take it out again and feel the tissue. | | | | you hold one opening closed to prevent the water |
| 6. Now and try all the questions on top. | | | | from the funnel to go into the straw. When the straw |
| Conclusion: | | | | is through the water layer and you remove your finger, |
| Air takes up space and it is all around us. The tissue | | | | the air in the bottle can escape through the straw and |
| stays dry in the first part because the air between the | | | | the water starts pouring into the bottle. |
| water and the tissue prevent the water from reaching | | | | These two science fair projects kids will love to do |
| it and making it whet. In the second part you allowed | | | | can be turned into a very good science fair project. |
| the air to escape and water could fill that space left by | | | | Pay attention to the scientific method and your display. |
| the escaping air. The air was not there to form a layer | | | | |