SLIME TIME...!!!

Slime is fun material that you can make yourself using common household ingredients. The ingredients start out as liquids, but when you mix them together chemical bonds form between the molecules in the slime, forming a substance known as a polymer. You encounter polymers every day. Examples of common polymers include the cellulose in paper and trees, keratin in hair and nails, and all types of plastics.

YOU WILL NEED.

¤ Elmer's glue
¤ Disposable cup
¤ Food coloring (you pick the color)
¤ 100 grams of corn starch
¤ 100 mL of water
¤ Table spoon

WHAT TO DO.

1. Put 100 mL of water in a cup,
2. Dissolve 100 grams of corn starch and stir it until it mixed properly.
3. Put 2 drops of food coloring and heat up the mixture
4. Wait until the mixture turned to become slime
5. Wait until the mixture is cooling down (once it cooled down, store it in a tight-air container)
6. Your slime is ready to play.



HOW DOES IT WORK.


Now for the SCIENCE part...!!! this polymer is very unique because it has the both properties of solid and liquid. It can take shape its container as a liquid, also you can hold it in your hand and pick it up like a solid does. As we know the particles of solid are tightly packed together, liquid particles break apart and spread out. As a polymer, the molecules are CHAIN together as a huge molecule (they can strecth and bend  like chains) and that makes them very special. Rubber band, plastic soda bottles, sneaker soles are example of polymers. The polymer that you made need to be kept in a tight-air container when you are not playing with that. Have fun!

Learning Video

Here is a video of Periodic table.
http://www.youtube.com/watch?v=0RRVV4Diomg

assessment schedule GRADE 9L Chemistry IGCSE

MONDAY, September 8th 2014
-- Written test 

TUESDAY, September 9th 2014
--Practical test 

LEARNING VIDEO

LEARNING VIDEO
this video will help the students to learn about elements, compounds and mixtures
https://www.youtube.com/watch?v=Tm-M4OFSaCU

Learning video

Elements, compounds and mixtures learning video.
https://www.youtube.com/watch?v=JIxHz81iXV8

Make A Crystal Snowflake

Learn how to make a snowflake using borax and a few other easy to find household items. Find out how crystals are formed in this fun crystal activity, experiment with food coloring to enhance the look and keep your finished crystal snowflake as a great looking decoration! What you'll need: 1)StringWide mouth jar 2) White pipe cleaners 3) Blue food coloring (optional) 4) Boiling water (take care or better still get an adult to help) 5) Borax 6) Small wooden rod or pencil Instructions: 1) Grab a white pipe cleaner and cut it into three sections of the same size.  Twist these sections together in the center so that you now have a shape that looks something like a six-sided star. Make sure the points of your shape are even by trimming them to the same length. 2) Take the top of one of the pipe cleaners and attach another piece of string to it. Tie the opposite end to your small wooden rod or pencil. You will use this to hang your completed snowflake. 3) Carefully fill the jar with boiling water (you might want to get an adult to help with this part). 4) For each cup of water add three tablespoons of borax, adding one tablespoon at a time. Stir until the mixture is dissolved but don’t worry if some of the borax settles at the base of the jar. 5) Add some of the optional blue food coloring if you'd like to give your snowflake a nice bluish tinge. 6) Put the pipe cleaner snowflake into the jar so that the small wooden rod or pencil is resting on the edge of the jar and the snowflake is sitting freely in the borax solution. 7) Leave the snowflake overnight and when you return in the morning you will find the snowflake covered in crystals! It makes a great decoration that you can show your friends or hang somewhere in your house. What's happening? Crystals are made up of molecules arranged in a repeating pattern that extends in all three dimensions. Borax is also known as sodium borate, it is usually found in the form of a white powder made up of colorless crystals that are easily dissolved in water.When you add the borax to the boiling water you can dissolve more than you could if you were adding it to cold water, this is because warmer water molecules move around faster and are more spread apart, allowing more room for the borax crystals to dissolve.When the solution cools, the water molecules move closer together and it can't hold as much of the borax solution. Crystals begin to form on top of each other and before you know it you have your completed crystal snow flake!

Solids, Liquids, and Gasses

http://m.youtube.com/watch?v=pmHxYE_vDBs&desktop_uri=%2Fwatch%3Fv%3DpmHxYE_vDBs