You need: A polyethylene bag, some ordinary pencils, water.
The experiment: Fill about half the polyethylene with water. Pierce the bag using the pencils in the places where it's filled with water.
Explanation: If you pierce the bag with the pencils and only then pour in the water, it will seep out through the holes you've made. But if you fill it first and then insert the pencils, the water will not seep out at all. This is a result of the fact that when the polyethylene is broken apart its molecules move closer together. In this case, the polyethylene tightens around the pencils.
The experiment: Light a match and hold it about 2-3 inches away from the wall. Shine a flashlight over your hand holding the match. You'll notice that only the shadow of your hand and the matchstick itself will appear on the wall - the flame will not appear.
Explanation: Fire does not produce a shadow, because it doesn't impede the passage of light through itself in the same way that physical materials do.
Courtesy Holly Bailey Hudson on Facebook: (I) wanted to do something original to really motivate the kids for good grades. They love games and surprises, so I made a Mystery Report Card Reward Jug...... for each A they receive on their Report cards, they choose a stick, and a 4.0 gets an extra draw! Prizes written on the sticks range from 50 cents to $2.00, get out of chores free card, one small DQ blizzard, choice of dinner one night, as well as a few "Prizes" such as puzzles or candy that we bought. They LOVED it!
1. Put game pieces or cards inside. Perfect for when the students need to draw a new card without having to worry about trying to keep the cards in a neat pile. 2. Keep on a table or desk for used tissues and other trash, when the trash can is on the other side of the room. 3. Great storage for scissors or pencils, or other supplies. 4. Ideal for tactile games such as "What's inside?", where students have to reach inside and try to describe or identify the object that's inside without being able to look at it. 5. Keep plastic grocery bags inside for those students who forget their backpacks and need to pack home past work.
From the website (link here): Sparky the Fire Dog's ® brand new app is loaded with games and activities perfect for teaching your early learner how to stay safe in case of a fire, plus early math, reading and literacy skills.
Discuss what this is a picture of. Where would you normally find waves? But this isn't the beach, and these aren't ocean waves. How can you tell this isn't the ocean? What do you think is causing these waves?