science intensive week - week ten

Science Intensive Week - Week 10 ROOM 9

Activity 1 - Inquiry - Wednesday 24/10/10

1.What is science? In the intervening period between the time mentioned and the time under consideration,typically the present.

2. What is matter? Physical substance in general, as distinct from mind and spirit, be important or significant.  

3. What are the three states of matter? The three states of matter are the three distinct physical forms that matter can take in most environments : solid, liquid, and gas. In extreme environments, other states may be present, such as plasma, bose-Einstein condensates, and neutron stars

1. 4. What is a chemical change? chemical change is any change that results in the formation of new chemical substances. At the molecular level, chemical change involves making or breaking of bonds between atoms. These changes are chemical: iron rusting (iron oxide forms) gasoline burning (water vapor and carbon dioxide form)

1. 5. What is a physical change? A physical change is any change NOT involving a change in the substance's chemical identity. Here are some examples: any phase change. Moving between solid, liquid and gas involves only the amount of energy in the sample this amount is the subject of future lessons.

     6. What is a solution?  A liquid mixture in which the minor component the solute is       uniformly distributed within the major component the solvent.

     7. What is a mixture? A combination different things in which the component elements are individually distinct.

1.      8. What is evaporation? Evaporation is a type of vaporization of a liquid that occurs from the surface of a liquid into a gaseous phase that is not saturated with the evaporating substance. The other type of vaporization is boiling, which is characterized by bubbles of saturated vapor forming in the liquid phase.

     9. What is condensation? water which collects as droplets on cold surface when humid air is in contact with it.

     10. What is transpiration? Transpiration is essentially evaporation of water plant leaves.

     11. What is the meaning of the word Hypothesis? A proposition, set forth as an explanation for the occurrence of some specified group of phenomena.

     12. What is precipitation? The action or process of precipitating a substance from solution.

Activity 2 - Chemical or Physical

Activity	Reaction	Reason
1.Burning	chemical	Because paper just burn then turns black and floats in the air like ashes.
2. Adding salt to water	chemical	When you fill up a cup of water and pour in salt it will just sit at the bottom of the cup.
3. Frying an egg	chemical	because sometime it will stick on the pan.
4. Melting an ice-block	Physical	the ice mix together and make stains on the table.
5. Rotting orange	chemical	If you leave the orange on the table for more than five days it will be rotten.
6. Rusting nail	chemical	if you try and build with a rusting nail it will break.
7.Firecrackers	chemical	you can fire them at night-time.
8. Baking	chemical	you can bake food for your whole family.
9. Raining	physical	when it is finished rain it will be going to the water cycle.

Activity 3 - How do we know a chemical reaction has taken place?

If there is a chemical reaction, one of the following will happen?

1. It will change colour
2. The temperature  will change.
3. It fizzes, meaning a given is given off.
4. There might be a different solid.