Tech Week Reflection

Below is a video reflection of Term 3's Tech Week.

Science Fair

Science Fair

Why I picked this topic

We picked this topic for science fair because one of the hardest stains to get out is the tomato sauce stain. Also mothers have a very hard time getting these horrible tomato sauce stains out so we compared products from Vanish to Sprite and picked the best one.

What was the most interesting part of this project - why

The most interesting part of this topic was because Vanish did not work as well we thought it would, in fact it was the worst product we used. Also we was not surprised that bleach worked the best, but we learned that bleach also as well as cleaning but also wrecks the cloth.

What was the hardest thing about the investigation - why

The hardest thing was figuring out what to use instead of a washing machine because if we used a washing machine the products would have mixed, so we ended up using a scrubbing brush. Next time we think we should use something else instead of a washing machine and a scrubbing brush.

What would you do differently next time - why

We think next time we should find a better solution of cleaning the stains instead of a washing machine and a scrubbing brush. Also we think that instead of using cloth for the tests we should use actual white clothing.

We went to the science fair on the 9th August with my class and Room 4 to look if we got anything. Unfortunately we got nothing but it was fun making it.

Scientific Writing

This week we have been creating our science investigation, but we did not know the parts of a science investigation and how to write it up. So Mrs Hancock taught us the proper way of writing up our science investigation, we did an egg experiment to learn how to write it up.

Egg Experiment

Aim: My aim is to find out what happens to an egg submerged in vinegar.

Hypothesis: I believe that the egg will bounce and the shell will dissolve, based on this information the acetic acid in the vinegar will dissolve the eggshell made of calcium carbonate. And it makes a chemical reaction.

Equipment:

Plastic cup x1

White Vinegar

An  Size 6 Egg

Method:

1. Put the plastic cup on a flat surface.
2. Place an egg in the cup.
3. Pour the white vinegar in the cup until the egg is submerged in vinegar.
4. Wait for four days.
5. After the four days see what has happened.

Results: I took the egg onto the grass to test what the vinegar had done to the egg. I held the egg about 15 centimeters off the ground and let it fall, it bounced a few times then stopped, but when I dropped it about 1 meter off the ground and it cracked.

Conclusion: Overall my hypothesis was correct because I thought that the eggshell will dissolve and it would bounce. It was cool seeing the shell disappear. My main finding was the chemical reaction, when the acetic acid (in the vinegar) and the calcium carbonate (the eggshell) combined it creates a chemical reaction and causes the shell to come off.