The document discusses different types of energy and chemical reactions. It defines heat energy as energy transferred due to temperature differences, and light energy as coming from the sun and being given off in chemical reactions. It also discusses sound being produced in chemical reactions. Key chemical reactions covered include photosynthesis, respiration, rusting, and combustion, and it defines reactants as starting materials and products as substances formed.

1. Types of Energy and
Chemical Reactions

2.  Heat energy: Energy that is transferred
from one substance to another due to a
difference in temperature.

3.  Light Energy: energy that comes from the
sun. Chemical reactions give off light.

4.  Sound: Noise that is given off during a
chemical reaction.

5. Chemical Reactions
 Photosynthesis: Light energy is converted
into chemical energy. Light energy is
used to convert water and CO2 into O2 and
sugar.

6.  Respiration: The opposite of
photosynthesis. Sugar and O2 is
converted into H2O and CO2

7.  Rusting: when air reacts with water and
iron.

8.  Combustion: a compound reacts with an
oxidizing element, such as oxygen.

9.  Products: the substances formed from a
chemical reaction.
 Reactant: the starting materials in a
chemical reaction.
6H2O + 6CO2 ----------> C6H12O6+ 6O2
^ ^
Reactant Product

10.  Products: the substances formed from a
chemical reaction.
 Reactant: the starting materials in a
chemical reaction.
6H2O + 6CO2 ----------> C6H12O6+ 6O2
^ ^
Reactant Product