YOU NEED OUT: Expo Marker White Board

QUICK WRITES Practice writing about our BIG IDEAS from this Unit! Practice makes perfect! Show what you know through good effort, well-written sentences, and using scientific talk/vocab (underline GOOD word choices)

Which statements are true? Identify the correct statements

Write only true statements on your whiteboard 1.) Temperature has no effect on how fast a chemical change occurs. 2.) Temperature has an effect on how fast a chemical change occurs. 3.) Lower temperatures allow for faster chemical reactions. 4.) Higher temperatures allow for faster chemical reactions. 5.) The production of a gas is evidence of a chemical change. 6.) The production of a gas is evidence of a physical change. 7.) Chemical changes actually change the properties of a substance. 8.) Physical changes actually change the properties of a substance. 9.) Ice cream melting is an example of a chemical change. 10.) A rotting strawberry is an example of a chemical change.

Write only true statements on your whiteboard ANSWERS

true statements 2.) Temperature has an effect on how fast a chemical change occurs. 4.) Higher temperatures allow for faster chemical reactions. 5.) The production of a gas is evidence of a chemical change. 6.) The production of a gas is evidence of a physical change. (if it is water boiling/evaporation which is changing state of matter) 7.) Chemical changes actually change the properties of a substance. 10.) A rotting strawberry is an example of a chemical change.

How do I know if a physical change occurred How do I know if a physical change occurred? Give examples of what you would see.

Physical changes can be reversed. No new matter is formed Physical changes can be reversed. No new matter is formed. Ex: dissolving (solubility), melting, changing shape, changing phases (solid to liquid to gas) crushing, compressing, breaking, malleable

How do I know if a chemical change occurred How do I know if a chemical change occurred? Give examples of what you would see.

Chemical changes cannot reversed because a new substance is formed Chemical changes cannot reversed because a new substance is formed. Ex: Flammability rusting, gas bubbles, a color change, rotting

How does temperature affect physical changes? Give an example.

Temp Phases Change Faster When temperatures get hotter, things will dissolve faster. When temperatures get hotter, states of matter will change faster Temp Solubility ? Temp Phases Change Faster

How does temperature affect Chemical changes? Give an example.

When temperatures get hotter, chemical reactions occur faster Temp Cemical reactions

Solute Solvent Solution. What is the difference Solute Solvent Solution? What is the difference? explain the differences and draw pictures with labels to support your answer