Grade 8. A powerpoint presentation about the transfer of energy in the ecosystem. An explanation on the role of energy in the environment.

1. ENERGY

2. ENERGY
It is the ability to do
work. It can occur
in various forms
and one form of
energy can be
converted to
another form.

6. STATES OF
MATTER

8. SOLID

9. LIQUID

10. GAS

11. PLASMA

12. CHEMICAL
REACTION
One or more substances change
to produce one or more
different substances. Energy is
absorbed or released when
chemical bonds are broken and
new ones are formed.

16. METABOLISM
Is the term used to describe all the
chemical reactions that occur in an
organism.

19. ACTIVATION ENERGY
The amount of energy needed to
start the activation energy for a
hypothetical chemical reaction.

21. CATALYSTS
These are certain chemical
substances that reduce the amount
of activation energy that is needed
for a reaction to take place.

25. ENZYME
Is a protein or RNA molecule that
speeds up metabolic reactions
without being permanently changed
or destroyed.

29. REDOX REACTION
These are reactions in which
electrons are transferred between
atoms are known as oxidations.

32. OXIDATION REACTION
A reactant one or more electrons
thus becoming more positive in
change.

35. REDUCTION
REACTION
A reaction gains one or more
electrons, thus becoming more
negative in charge.

37. ThankYou