1. Burning Toast
2. Glass Breaking
3. Chocolate Melting
4. Baking Soda/Vinegar
5. Frozen Water
1. Burning Toast
Chemical Change - gas formation, color and taste
change
2. Glass Breaking
3. Chocolate Melting
4. Baking Soda/Vinegar
5. Frozen Water
1. Burning Toast
Chemical Change - gas formation, color and taste
change
2. Glass Breaking
Physical Change - substance is the same, just smaller
3. Chocolate Melting
4. Baking Soda/Vinegar
5. Frozen Water
1. Burning Toast
Chemical Change - gas formation, color and taste
change
2. Glass Breaking
Physical Change - substance is the same, just smaller
3. Chocolate Melting
Physical Change – change in state of matter solid to
liquid, but still chocolate until it starts to burn
4. Baking Soda/Vinegar
5. Frozen Water
1. Burning Toast
Chemical Change - gas formation, color and taste
change
2. Glass Breaking
Physical Change - substance is the same, just smaller
3. Chocolate Melting
Physical Change – change in state of matter solid to
liquid, but still chocolate
4. Baking Soda/Vinegar
Chemical Change – gas formation and temp change
5. Frozen Water
1. Burning Toast
Chemical Change - gas formation, color and taste
change
2. Glass Breaking
Physical Change - substance is the same, just smaller
3. Chocolate Melting
Physical Change – change in state of matter solid to
liquid, but still chocolate
4. Baking Soda/Vinegar
Chemical Change – gas formation and temp change
5. Frozen Water
Physical change – change in state from liquid to solid
but still water
6. Water evaporating
7. Burning Wood
8. Baking a Cake
9. Roasting Marshmallow
10. Making Lemonade
6. Water evaporating
Physical change – change in state from liquid to gas, but still is
H2O
7. Burning Wood
8. Baking a Cake
9. Roasting Marshmallow
10. Making Lemonade
6. Water evaporating
Physical change – change in state from liquid to gas, but still is
H2O
7. Burning Wood
Chemical change – new substance produced (ash/charcoal),
gas formation and color change
8. Baking a Cake
9. Roasting Marshmallow
10. Making Lemonade
6. Water evaporating
Physical change – change in state from liquid to gas, but still is
H2O
7. Burning Wood
Chemical change – new substance produced (ash/charcoal),
gas formation and color change
8. Baking a Cake
Chemical change – from cake batter to cake, cannot get batter
back into original form
9. Roasting Marshmallow
10. Making Lemonade
6. Water evaporating
Physical change – change in state from liquid to gas, but still is
H2O
7. Burning Wood
Chemical change – new substance produced (ash/charcoal),
gas formation and color change
8. Baking a Cake
Chemical change – from cake batter to cake, cannot get batter
back into original form
9. Roasting Marshmallow
Chemical change – as it’s melting, the change is physical, but
when it starts to turn brown a chemical (color) change occurs
10. Making Lemonade
6. Water evaporating
Physical change – change in state from liquid to gas, but still is
H2O
7. Burning Wood
Chemical change – new substance produced (ash/charcoal),
gas formation and color change
8. Baking a Cake
Chemical change – from cake batter to cake, cannot get batter
back into original form
9. Roasting Marshmallow
Chemical change – as it’s melting, the change is physical, but
when it starts to turn brown a chemical (color) change occurs
10. Making Lemonade
Physical change – sugar crystals are still in the water and can
be retrieved by evaporating the water. No new substance.
Anything dissolved in water is a physical change.
11. Making Putty
12. Mixing Dye and Bleach
13. Cutting Grass
14.Fireworks Exploding
14.Food Spoiling
11. Making Putty
Chemical - new substance formed out of glue and borax
A precipitate was formed (solid)
12. Mixing Dye and Bleach
13. Cutting Grass
14.Fireworks Exploding
14.Food Spoiling
11. Making Putty
Chemical - new substance formed out of glue and borax
12. Mixing Dye and Bleach
Chemical – the bleach changed the green to blue
13. Cutting Grass
14.Fireworks Exploding
15. Food Spoiling
11. Making Putty
Chemical - new substance formed out of glue and borax
12. Mixing Dye and Bleach
Chemical – the bleach changed the green to blue
13. Cutting Grass
Physical– the grass is still grass just smaller
14.Fireworks Exploding
14.Food Spoiling
11. Making Putty
Chemical - new substance formed out of glue and borax
12. Mixing Dye and Bleach
Chemical – the bleach changed the green to blue
13. Cutting Grass
Physical – the grass is still grass just smaller
14.Fireworks Exploding
Chemical – gas formation, temp change, light/glow
15. Food Spoiling
11. Making Putty
Chemical - new substance formed out of glue and borax
12. Mixing Dye and Bleach
Chemical – the bleach changed the green to blue
13. Cutting Grass
Physical – the grass is still grass just smaller
14.Fireworks Exploding
Chemical – gas formation, temp change, light/glow
15. Food Spoiling – chemical, depending on food, can have
color change, taste and smell change, gas formation,
precipitate (milk)
What are the rules for writing chemical symbols,
which help you to identify whether a chemical
formula is an element or compound?
1. First letter is a capital letter
2. Second letter (if there is one) is lower case
3. No cursive --- always print!
To count the elements, remember every
capital letter represents an element ….. Just
count the capital letters!
Subscript ---- are the small numbers underneath.
Coefficient --- the large number in front
How many atoms in H2O? How
many elements?
Subscript ---- are the small numbers underneath.
Coefficient --- the large number in front
How many atoms in H2O? How
many elements?
Answer: There are two elements and three
atoms ….2 Hydrogen and 1 Oxygen
A Physical Change does not create a new
substance; the same substance or substances still
exist. Changes in states of matter from gas to
liquid to solid are physical changes. Clue words are
cutting, smashing, breaking, melting, freezing,
boiling.
During a chemical change, new substances are created
which have completely different properties than the
originals. Clue words --- burning, bubbling, fizzing,
change of color.
List the signs of a chemical change --- explain fully!
List the signs of a chemical change --- explain fully!
1. Gas formation --- new substance fizzes and bubbles.
List the signs of a chemical change --- explain fully!
1. Gas formation --- new substance fizzes and bubbles.
2. Solid formation (precipitate) --- a new substance
(silly putty)
List the signs of a chemical change --- explain fully!
1. Gas formation --- new substance fizzes and bubbles.
2. Solid formation (precipitate) --- a new substance
(silly putty)
3. Temperature change ---- not heating or cooling, but a
spontaneous change with no outside source
List the signs of a chemical change --- explain fully!
1. Gas formation --- new substance fizzes and bubbles.
2. Solid formation (precipitate) --- a new substance
(silly putty)
3. Temperature change ---- not heating or cooling, but a
spontaneous change with no outside source
4. Color change --- new substance forms in a different
color (anything that is burned produces a color
change)
List the signs of a chemical change --- explain fully!
1. Gas formation --- new substance fizzes and bubbles.
2. Solid formation (precipitate) --- a new substance
(silly putty)
3. Temperature change ---- not heating or cooling, but a
spontaneous change with no outside source
4. Color change --- new substance forms in a different
color (anything that is burned produces a color
change)
5. Change in taste/smell --- example would be rotting
food
List the signs of a chemical change --- explain fully!
1. Gas formation --- new substance fizzes and bubbles.
2. Solid formation (precipitate) --- a new substance
(silly putty)
3. Temperature change ---- not heating or cooling, but a
spontaneous change with no outside source
4. Color change --- new substance forms in a different
color (anything that is burned produces a color
change)
5. Change in taste/smell --- example would be rotting
food
6. Glow/light ---- examples are fireworks and glow sticks