Flexibility test....

We had to do a test to see everyones flexibility, we had to sit down and put our feet against a box with a negative and positive ruler on it.

In our first test I came second, so in my group I was the second most flexible. But in our second test I improved but everyone else improved more, I came last.

Before we done our second we done some training we had about 30 laminated cards with different exercises on them. When Mrs Roil says swap we go round in a circle doing different exercises.

Those exercises would have helped improve our flexibility. When you do the stretches you have to hold then for a long time to make the stretch work. Thats why athletes take heaps of time to train and get good.

Holiday project- crossbow!

Holiday project! Crossbows are very cool to have. Crossbows make several sounds, but not much. The main sound of a crossbow would probably be when it fires, it makes big shot noise. One of the main sounds you might hear if you haven't built or bought a good enough crossbow. That sound would be a snap, which would be the limbs snapping. But hopefully you won’t have to hear that sound. The scope also may make a clicking sound if you have a scope on you crossbow.

Crossbows come in all different shapes and sizes. For example my homemade crossbow is the shape of a normal looking gun. It has a fat sicky-down shoulder rest with a nice curve at the end and a long barrel for the string to have more power to fling and fire the arrow or bullet. Some crossbows have big bits of wood all over the sides of the crossbow but those are rare.

Since there are different types of crossbows they all feel different, crossbows sometimes are really smooth. It would probably be because the people that made it has sandpapered the sides and other parts of the crossbow. Its best not to feel the barrel when you're about to shoot. Your hand would be hurt for days.   

Egg Drop

EGG DROP - NEWTON’S LAW OF INERTIA

Demonstrate gravity, motion, and other forces with this incredible science trick.

      

The Egg Drop is a classic science demonstration that illustrates Newton's Laws of Motion, namely inertia. The challenge sounds so simple... just get the egg into the glass of water, but there are a few obstacles. The egg is perched high above the water on a cardboard tube, and a pie plate sits between the tube and the water. Still think it's easy? Sir Isaac Newton does.

Materials

• Cardboard tube
• Pie pan
• Eggs
• Water
• A large drinking glass
• Tray (optional)
• Coloring Tablets (optional)

EXPERIMENT

Warning: Always wash your hands well with soap and water after handling raw eggs. Some raw eggs contain salmonella bacteria that can make you really sick!

1. Fill the large drinking glass about three-quarters full with water.
2. Center a pie pan on top of the glass.
3. Place the cardboard tube on the pie plate, positioning it directly over the water.
4. Carefully set the egg on top of the cardboard tube.
5. With your writing hand, smack the edge of the pie pan horizontally. Don't swing up, and don't swing down! It’s important that you hit the pie pan horizontally and use a pretty solid hit, so plan on chasing the plate and tube.
6. Your astonished guests will watch the egg plop nicely into the water. It’s even more fun to watch someone else try to drop the egg. Science is so cool!

TAKE IT FURTHER!

• Try setting up a tray (like one that you would get from a fast food restaurant) on top of five glasses. USe five tubes and five eggs and see if you are an egg drop master! *HINT* The angle that you hit the tray from can make all the difference.
• Add coloring to the water in your egg drop for added effect.
• Try testing longer tubes, more or less water, different liquids in the glass, different water containers, and heavier or lighter falling objects.

HOW DOES IT WORK?

Credit for this one has to go to Sir Isaac Newton and his First Law of Motion. He said that since the egg is not moving while it sits on top of the tube, that’s what it wants to do - not move. You applied enough force to the pie pan to cause it to zip out from under the cardboard tube (there’s not much friction against the drinking glass). The edge of the pie pan hooked the bottom of the tube, which then sailed off with the pan. Basically, you knocked the support out from under the egg. For a brief nanosecond or two, the egg didn’t move because it was already stationary (not moving). But then, as usual, the force of gravity took over and pulled the egg straight down toward the center of the Earth.

Also, according to Mr. Newton’s First Law, once the egg was moving, it didn’t want to stop. The container of water interrupted the egg’s fall, providing a safe place for the egg to stop moving so you could recover it unbroken. The gravity-pushed egg caused the water to splash out. Did someone get wet?

- See more at: http://www.stevespanglerscience.com/lab/experiments/egg-drop-inertia-trick#sthash.OJhXOOfl.dpuf

Why it worked: The egg experiment worked because when you pulled the paper plate the gravity forced the egg down and into the glass. In my group it was JJ first. Mrs Roil only let our group have one egg so if we broke it, we won't get a new one. Down below are the results of who succeeded.

JJ- *Success*

Kory- *Success*

Jaidyn R- *Success*

Samuel- *Fail*

Ethan. *Fail*

We still used the egg when I cracked it so that Ethan would get a turn. The egg landed on the side of the glass when I pulled the paper plate.