"Extra" science homeworkfor Week 5

SKMBT_C45110081611590

Week 4's "Extra" science homework

Click 'fullscreen' to see in full, or download the SKMBT file below.

Have fun!

Thanks to "101 Cool Science Experiments" by Helen Chapman, where I got this science activity from. Published by Hinkler Books, 2002.

SKMBT_C45110080911370

making Oobleck

Oobleck is a strange substance. when you touch it, it feels dry and hard, like a solid. When you stop touching it, it spreads out slowly, like a liquid!

Here's how to make it:

Put 2 tablespoons of cornflour in a bowl. Add a tablespoon of water to the cornflour, stirring it well. Keep adding a few drops of water at a time until the mixture is thick an creamy. Pick up the oobleck and roll it between your fingers. What do you notice? Stop rolling it. What happens?

Origami Homework

HI Everyone,

Here is the link I promised:

http://www.origami-instructions.com/origami-for-kids.html

Make sure you scroll DOWN the page and click on the little pictures.

Don't click on the writing at the top of the page because they are ADVERTS!

Making Casein PLastic

Make Casein Plastic

Casein is a plastic that is made from milk. It was one of the first plastics ever made and was used for making things like buttons.

What you need:

An adult to help you

2/3 of a cup of milk

8 teaspoons of vinegar

a pot

a plate

a stirring spoon

What you do:

Pour the milk into the pot and get an adult to help you bring it gently to the boil. When the milk begins to steam and bubble, dribble in the vinegar, stirring the milk all the time. You will see lumps begin to form.

When the little lumps clump together to make a big solid lump get the adult to pour off the liquid and then tip your casein plastic lump onto a plate.

When it cools a little bit mould it into a shape, like a button then leave it to harden over night.

You’ll end up with hard casein plastic. The first plastic that was ever invented - it’s a bit different from the plastic we’re used to!