HERE ARE EXAMPLES OF CHEMICAL REACTIONS.

2. GROWING CRYSTALS ON A STEEL BALL IS ALSO A PRECIPITATE
PRECIPITATE, IN
THIS CASE HAS
TURNED OUT
BLUE… THIS
PRECIPITATE HAS
FORMED/SUNK TO
THE BOTTOM
WHILST SOME
WILL FORM AT THE
TOP
When 2+ CHEMICALS COMBINE A SOLID/JELLY LIKE
SUBSTANCE CAN FORM THIS IS CALLED A PRECIPITATE

3. CLICK ON THIS LINK!!
GREAT VIDEO OF PRECIPITATE FORMING! 
CLICK THIS
LINK
http://www.georgiacenter.uga.edu/idl/webid/portfolio/video/test_tube.html
NB** THERE IS NO SOUND

4. A TEMPERATURE CHANGE IS WHEN 2+ CHEMICALS WORK TOGETHER TO CREATE A NEW
TEMPERATURE

5. A TEMPERATURE CHANGE IS WHEN 2+ CHEMICALS WORK TOGETHER TO CREATE A NEW
TEMPERATURE
e.g. WHEN YOU ADD MAGNESIUM TO HYDROCLORIC ACID YOU CREATE HYDROLIC GAS A
NEW SUBSTANCE!

6. WHEN YOU COMBINE CERTAIN
CHEMICALS A CHANGE IN COLOUR CAN
OCCUR. FOR EXAMPLE…. SOMETIMES
(DEPENDING ON CHEMICAL) YOU CAN
TAKE 2+ CLEAR CHEMICALS AND END
UP WITH A BLUE CHEMICAL!!
Chemical Chemical

7. GAS
LIGHT
HEAT

8. WHEN A NEW FORM OF ENERGY IS
RELEASED…….
GAS LIGHT HEAT
A GAS IS SOMETHING THAT LIGHT IS WHEN HEAT CAN COME FROM
IS A RESULT OF MULTIPLE CHEMICALS COMBINE SUBSTANCES BOILING
CHEMICALS COMBINING TO TO MAKE A BRIGHT TOGETHER OR FREEZING.
FORM A GAS IN THE AIR. A LIGHT, NOT WUITE AS E.G. WHEN MAGNESIUM IS
GAS CAN RANGE FROM COMMON AS HEAT AND ADDED TO HYDROGEN
OXYGEN RIGHT THROUGH GAS CHLORIDE IT BUBBLES AND
TO VERY RARE GASSES CREATES A SUBSTANCIAL
DIFFERENCE IN HEAT

9. » Irreversible change
» The opposite to a physical
change
» some examples are….
» temperature change
» release of energy
» permanent color change
» precipitate

10. BIBLIOGRAPHY
http://logos.simpleplants.com/Weather-
Seasons/thumbs/Weather-Seasons-
Thermometer_2.gif
http://www.georgiacenter.uga.edu/idl/webid/
portfolio/video/screen_cap_precip.jpg
http://www.scribd.com/doc/3964649/physical
-chemical-change

11. BY LUCY POLLOCK
8H