1. The organic molecules in living things undergo chemical reactions.
ADP ATP
Energy
ADP  ATP
Energy O O O
BURNING GLUCOSE
A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction.

2. Another chemical reaction:
Chemical Reactions
Photosynthesis
Energy
CO2 O2
A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction.
H2O

3. Chemical Reaction
A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction.
Process that transforms one set of chemicals into another.
Ex: burning glucose and photosynthesis.

4. Living things depend on chemical reactions to obtain energy.
A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction.

5. In the reaction below, glucose and oxygen are the reactants.
Chemical Reactions
ADP ATP O
ADP  ATP O O
A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction.

6. Reactants Chemicals that are present at the start of a reaction. O O O
Chemical Reactions
ADP ATP O
ADP  ATP O O
A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction.
Chemicals that are present at the start of a reaction.

7. Reactants are transformed into products.
Chemical Reactions
ADP ATP
ADP  ATP O O O
A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction.

8. Products Chemicals that are present at the end of a reaction. O O O
Chemical Reactions
ADP ATP
ADP ATP
Energy
ADP  ATP
Energy O O O
A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction.
Chemicals that are present at the end of a reaction.

9. Burning glucose: C6H12O6 O2 + H2O CO2 + Energy Released
Chemical Reactions
C6H12O6 O2 +
H2O
CO2 +
Energy
Released
A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction.

10. Label the reactants and products.
Burning glucose:
Chemical Reactions
C6H12O6 O2 +
H2O
CO2 +
Reactants
Energy
Released
Products
A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction.

11. Photosynthesis: Chemical Reactions
A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction.

12. Use the diagram below to write out the photosynthesis reaction.
Chemical Reactions
Energy
CO2 O2
A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction.
H2O

13. Photosynthesis: CO2 H2O + C6H12O6 O2 + Energy Absorbed
Chemical Reactions
Energy
Absorbed
CO2
H2O +
C6H12O6 O2 +
A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction.

14. Photosynthesis: CO2 H2O + C6H12O6 O2 + Energy Absorbed Reactants
Chemical Reactions
Energy
Absorbed
CO2
H2O +
C6H12O6 O2 +
Reactants
Products
A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction.

15. The animation below shows iron rusting
The animation below shows iron rusting. What are the reactants and product?
Chemical Reactions Fe + O
Fe2O 2
Reactants
Product Fe Fe Fe Fe O Fe Fe Fe Fe
Some chemical reactions occur slowly, such as the combination of iron and oxygen to form rust (iron oxide). This reaction can take years to complete. Fe Fe Fe Fe Fe Fe Fe Fe

16. Bonds always change during chemical reactions (old bonds break and new bonds form).
ADP  ATP O O O
Some chemical reactions occur slowly, such as the combination of iron and oxygen to form rust (iron oxide). This reaction can take years to complete.

17. Copyright Pearson Prentice Hall
Since bonds are made from energy, a change in bonds = a change in energy.
Chemical Reactions
Other reactions occur quickly. For example, when something is burned, the reaction is rapid and sometimes explosive. LIGHT CANDLE. But what exactly does it mean to “burn” something? Like rusting, burning means combining material with oxygen. When I burn the candle, I am combining it with oxygen. PLACE GLASS OVER CANDLE. This is why a flame will go out if it doesn’t get any air – it needs oxygen to burn. However, unlike rusting, when something is burned, it reacts with oxygen very rapidly. Burning also happens in our bodies. We eat food and breath in oxygen. We burn the food by combining it with oxygen . But how is the burning reaction in our bodies different from burning a candle? Our bodies can control the rate of the reaction so that we don’t burn up our food all at once. Instead, we burn it slowly. Our 98.6 degree body heat is a result of this slow burn.
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18. Copyright Pearson Prentice Hall
Energy is either released or absorbed during chemical reactions.
Chemical Reactions
Other reactions occur quickly. For example, when something is burned, the reaction is rapid and sometimes explosive. LIGHT CANDLE. But what exactly does it mean to “burn” something? Like rusting, burning means combining material with oxygen. When I burn the candle, I am combining it with oxygen. PLACE GLASS OVER CANDLE. This is why a flame will go out if it doesn’t get any air – it needs oxygen to burn. However, unlike rusting, when something is burned, it reacts with oxygen very rapidly. Burning also happens in our bodies. We eat food and breath in oxygen. We burn the food by combining it with oxygen . But how is the burning reaction in our bodies different from burning a candle? Our bodies can control the rate of the reaction so that we don’t burn up our food all at once. Instead, we burn it slowly. Our 98.6 degree body heat is a result of this slow burn.
Energy released
Energy absorbed
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19. Exothermic
OUT
A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction.
Chemical reaction that releases energy. Ex: burning glucose.

20. Endothermic Chemical reaction that absorbs energy. Ex: photosynthesis.IN
A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction.
Chemical reaction that absorbs energy. Ex: photosynthesis.

21. Copyright Pearson Prentice Hall
Write in notes:
Chemical Reactions
Chemical Reactions
Energy absorbed
Energy released
Exothermic
Endothermic
Other reactions occur quickly. For example, when something is burned, the reaction is rapid and sometimes explosive. LIGHT CANDLE. But what exactly does it mean to “burn” something? Like rusting, burning means combining material with oxygen. When I burn the candle, I am combining it with oxygen. PLACE GLASS OVER CANDLE. This is why a flame will go out if it doesn’t get any air – it needs oxygen to burn. However, unlike rusting, when something is burned, it reacts with oxygen very rapidly. Burning also happens in our bodies. We eat food and breath in oxygen. We burn the food by combining it with oxygen . But how is the burning reaction in our bodies different from burning a candle? Our bodies can control the rate of the reaction so that we don’t burn up our food all at once. Instead, we burn it slowly. Our 98.6 degree body heat is a result of this slow burn.
Copyright Pearson Prentice Hall

22. Since living things require energy to live, most of the reactions that take place in our bodies are exothermic.
Chemical Reactions
Other reactions occur quickly. For example, when something is burned, the reaction is rapid and sometimes explosive. LIGHT CANDLE. But what exactly does it mean to “burn” something? Like rusting, burning means combining material with oxygen. When I burn the candle, I am combining it with oxygen. PLACE GLASS OVER CANDLE. This is why a flame will go out if it doesn’t get any air – it needs oxygen to burn. However, unlike rusting, when something is burned, it reacts with oxygen very rapidly. Burning also happens in our bodies. We eat food and breath in oxygen. We burn the food by combining it with oxygen . But how is the burning reaction in our bodies different from burning a candle? Our bodies can control the rate of the reaction so that we don’t burn up our food all at once. Instead, we burn it slowly. Our 98.6 degree body heat is a result of this slow burn.

23. (More common in living things)ds
Chemical Reactions
Chemical Reactions
Energy absorbed
Energy released
Exothermic
Endothermic
(More common in living things)
Other reactions occur quickly. For example, when something is burned, the reaction is rapid and sometimes explosive. LIGHT CANDLE. But what exactly does it mean to “burn” something? Like rusting, burning means combining material with oxygen. When I burn the candle, I am combining it with oxygen. PLACE GLASS OVER CANDLE. This is why a flame will go out if it doesn’t get any air – it needs oxygen to burn. However, unlike rusting, when something is burned, it reacts with oxygen very rapidly. Burning also happens in our bodies. We eat food and breath in oxygen. We burn the food by combining it with oxygen . But how is the burning reaction in our bodies different from burning a candle? Our bodies can control the rate of the reaction so that we don’t burn up our food all at once. Instead, we burn it slowly. Our 98.6 degree body heat is a result of this slow burn.
Copyright Pearson Prentice Hall

24. (More common in living things)
Draw in notes:
Chemical Reactions
Chemical Reactions
Energy absorbed
Energy released
Exothermic
Endothermic
(More common in living things)
Photosynthesis
Other reactions occur quickly. For example, when something is burned, the reaction is rapid and sometimes explosive. LIGHT CANDLE. But what exactly does it mean to “burn” something? Like rusting, burning means combining material with oxygen. When I burn the candle, I am combining it with oxygen. PLACE GLASS OVER CANDLE. This is why a flame will go out if it doesn’t get any air – it needs oxygen to burn. However, unlike rusting, when something is burned, it reacts with oxygen very rapidly. Burning also happens in our bodies. We eat food and breath in oxygen. We burn the food by combining it with oxygen . But how is the burning reaction in our bodies different from burning a candle? Our bodies can control the rate of the reaction so that we don’t burn up our food all at once. Instead, we burn it slowly. Our 98.6 degree body heat is a result of this slow burn.
Burning glucose
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