Gravity - Which Hit The Ground First?

 

(The link to the photo above: http://en.wikipedia.org/wiki/Marble_(toy))

Yesterday my partner and I conducted an investigation about gravity using certain objects like:

• Marble
• Rubber
• Flat Paper
• Crumpled Paper
• Feather
• Paper Clip
• Pencil
• Ping Pong Ball

We used these objects (names above) to see which hit the ground first. But before we went straight into it we had to predict which of the objects we think will hit the ground first. So we grabbed two objects, leveled them to see if its on an equal height then dropped them both at the same time to see what results we’ll get.

The table below shows my results:

Object Dropped		Which hit the ground first?	Which actually hit the ground first?
Marble	Ping pong ball	Marble	Marble
Rubber	Paper Clip	Rubber	Rubber
Marble	Pencil	Marble	Same time
Flat Paper	Feather	Flat Paper	Paper
Crumbled Paper	Feather	Crumpled Paper	Crumpled Paper
Feather	Paper Clip	Paper Clip	Paper Clip

Science - Fizz and Foam

W.A.L.T:  Observe and report on the chemical reaction that occur when combining substance together.

Today we used test tubes and beakers. We used two of the test tubes and pour lemon juice in one tube and malt vinegar in another one. We had a table that has citric acids, tartaric acids, baking soda, chalks and cordial (raro) to mix with our ingredients.

We took our glass beakers and plastic spoon to the table with all the dry ingredients and took a spoonful of one ingredient and mixed it with one of the acid liquids. (eg; citric acid and lemon juice).

Hypothesis: (Prediction)

• Baking Soda + Malt Vinegar = The baking soda and malt vinegar together created  bubbles = Reaction
• Tartaric Acid + Lemon Juice = The tartaric acid and lemon juice together created fizzing bubbles = Reaction
• Citric Acid + Malt Vinegar = The two combine together will make bubbles = Reaction
• Raro + Lemon Juice = These two products mixed together will make no reaction, but a nice smell and  a sweet and sour taste =  No Reaction
• Chalk + Malt Vinegar = These products together will make a mushy and disgusting look but a nice wine smell.
• Raro + Citric Acid + Malt Vinegar = The two dry ingredients and the vinegar together will make yucky look of bubbles but a nice smell.  Also when you put a finger tip of the products together, it feels like it is pinching your tongue.
• Malt Vinegar + Citric Acid + Chalk = This combine together will make fizzing bubbles and make it look mushy. It also tastes like vinegar.

Sink Or Float?

Equipment:

• Plastic Container
• Water 3/4
• Table salt
• Teaspoon
• Eyedropper
• Clay

Instructions:

1. Fill the container 3/4 full with water.
2. Put a small piece of clay around the bottom of the eyedropper. DO NOT BLOCK THE OPENING!
3. Float the eyedropper in the water.
4. Now squeeze the bulb of the dropper to let the air out one drop at a time, testing after each drop to see if the dropper will sink.
5. Once the dropper sinks, stir in teaspoons of salt into the water one at a time - until it floats again.
6. Record how many teaspoons of salt it took to make the eyedropper float again.

It took 11 teaspoon of salt to make the eyedropper float again.

Hypothesis: Even a little piece of clay will just make the eyedropper sink in fresh or salt water.

We carried out a Science investigation to find out what affect adding salt to water would have on an object that was weighted down in water.   

The purpose why we did this experiment was to see adding salt to the water will make the eyedropper float again if it sunk.