Drawing Graphs

Drawing Grapghs

Properties of Materials

• Density
• Strength 
• Hardness
• Flexibility
• Electrical Conductivity
• Thermal Conductivity
• Boiling Point

Elements & Compound

Elements are

• the basic building block of matter
• one type atom
• may exist as atoms or molecule
• Periodic table-Group-Period-ZigZag line

Compound	Constituent elements
Water	2 atoms of hydrogen + 1 atom of oxygen
Sodium Chloride	1 atom of sodium + 1 atom of chlorine
Carbon Dioxide	1 atom of carbon + 2 atoms of oxygen
Sulphur Dioxide	1 atom of sulphur + 2 atoms of oxygen
Hydrogen Chloride	1 atom of oxygen + 1 atom of chlorine

Periodic Table

This is the source http://www.elementsdatabase.com/.

THIS IS A PERIODIC TABLE WITH GROUPS AND PERIOD

Diffusion & Osmosis

“from more to less”

Small Molecule- Salt, Water, Glucose

Large Molecule- Starch, Glucose, Urea

particles movefrom more to less-then become evenly distributed-randomly moving

Diffusion is a slow process, and might need other processes to speed it up

Bouncy Raw Egg

1. Place a quail's egg in a beaker. Fill the beaker with dilute hydrochloric acid.

• Observations

1. The shell starts to dissolve and get off
2. Efferbesence has occured

THE RESULTS

	Before Putting Egg in Water	After Soaking the Egg For 30 Minutes in Water	After Soaking the Egg For 24 hours in Water
Hardness if Egg (soft, hard)	Hard	Soft	Soft
Length of egg/cmd	3.7	3.5	3.7

3-8-11 practical Artificial intestines

Procedures
Test for Starch

1. Place 1cm^3 of the unkown sample in the test tube
2. Add a few drops of iodine solution
3. Shake well
4. If starch is present, the solution in the test tube will turn blue-black
5. If starch is absent, the content in the test tube will be yellowish

Test for Reducing Sugars

1. Place 2cm^3 of the unknown sample in a test tube
2. Add 2cm^3 of Benedicts Solution
3. Place the test tube in a beaker of boiling water
4. If reducing sugars is present, a precipitate will form, and will turn from yellow to orange to brick red

*If reducing sugars is absent, the content of the test tube will be blue
Factors that Affect Solubility

• Temperature
• Nature of Solute (Sugar, Salt)
• Nature of Solvent (Water, Oil)
• Rate of dissolving
• Rate of Stirring
• Temperature of Solution
• Size of solute particles