C
A change in matter in which a new substance is not formed
physical change
A change in one or more substances, caused by a reaction that forms new and different substances.
chemical change
List some of the Physical properties of matter
color, taste, texture, shape, size, order,
Examples of a Mixture
Oil and water
salad
granola
cinnamon and sugar
SOLUTION or MIXTURE
Salt water
a bowl of carrots, broccoli and cauliflower
Lemonade
A bag of assorted balls
solution
mixture
solution
mixture
The larger part of a solution that dissolves other substances
The larger part of a solution that dissolves other substances
solvent
A chemical change
chemical reaction
a change of state
when heat is added or removed
Examples of a solution
Examples of a solution
salt water lemonade, hot cocoa
air some metals
MS. Johnson wants to make hot chocolate. She added two spoonfuls of cocoa powder, 3 spoonfuls of sugar and a handful of marshmallows to hot water.
Identify solvent and solutes
solvent - hot water
solutes - cocoa powder, sugar and marshmallows
A combination of two or more different substances that keep their identities
mixture
If a car rust, does the mass change?
Does a new substance form?
does not change
yes forms a new substance
Compare Mixture and Solutions
Both contain more than one substance which keep their chemical properties combined
Why do some of the marshmallows melt in the cocoa?
Heat from the hot water is transfer to the marshmallows making them melt
The substance that dissolves when making a solution
solute
What substance will rust?
What substance will tarnish?
What substance will burn?
car
copper
wood
If wood burns, does the mass change?
Does a new substance form?
No change
Yes chemical change
Contrast mixture and solution
In solution substance are evenly mixed
In a Mixture not evenly mixed
There were 10 candles on Susan's birthday cake when her parents carried it to the table. She made a wish and blew out the candles. Later, she put them away.
IDENTIFY TWO PHYSICAL CHNAGES
wax melting
wax hardening when it cools
A mixture that has the same composition throughout because all the parts are evenly mixed
solution
Signs of chemical change
rust, burning, tarnishing
What causes steel wool to rust?
How can you stop it from rusting?
oxygen and water
take away one thing
Difference between chemical and physical changes?
Chemical: produces new substance
Physical: does not produce a new substance
When you light a candle on a cake and blow it out, what three chemical changes happened?
wick burning
formation of heat and light
formation of smoke