1. Definition of Explanation:
Description:
Definition of Explanation:
noun
A statement or an account describing something:
Example: a vivid description of the game.
noun.
The act or process of explaining
A mutual clarification of misunderstandings

2. Lesson Starter #3

3. DO NOT SWALLOW ANY OF THE CRAKER!!!!
Cracker Activity
DO NOT SWALLOW ANY OF THE CRAKER!!!!

4. Elements Essential for Life

5. Elements:
Elements are any substance that cannot be broken down into simpler substances.
Atoms are the smallest unit of an element.
What is an example of an element?

6. “Served with a grain of salt”
Elements found in living things that are essential for the survival of living things include:
“Served with a grain of salt” N
CHOPS CaFe

7. Raffle Ticket Showdown!
N C H O P a F e
Raffle Ticket Showdown!

8. Using the list of essential elements on the next slide:
Estimate the percentage of each element that is found in the human body. (Remember only 100% total)

9. Phosphorous Oxygen Carbon Nitrogen Calcium Hydrogen
Estimate Percentage
Actual Percentage
Phosphorous Oxygen Carbon Nitrogen Calcium Hydrogen

10. Oxygen 65% Carbon 18. 5% Hydrogen 9. 5% Nitrogen 3. 2% Calcium 1
Oxygen 65% Carbon 18.5% Hydrogen 9.5% Nitrogen 3.2% Calcium 1.5% Phosphorous 1%

11. What role do the various elements play?
Molecules that compose living things are called organic molecules.
Organic molecules are built from the elements NCHOPS CaFe.

12. Organic Compounds found in living things:
A. Carbohydrates -- energy rich
organic compounds. They store
energy.
Importance:
1--Provide cells in living organisms with a source of energy.

13. B. Proteins are large organic molecules made of carbon, hydrogen, oxygen, nitrogen, and in some cases sulfur.
Importance:
The cell uses proteins to change the information in DNA into cell parts.

14. ●Amino acids are small molecules that make up proteins.
●Enzymes are types of proteins that speed up chemical reactions in living things.
●If living organisms did not have enzymes, chemical reactions that are necessary for life would not occur or take too long to occur.

15. Brain Break!
Think about that mushy cracker!
Why did it become mushy?

16. Importance: Lipids are energy-rich
◊ The major function of lipids to store energy.

17. D. Nucleic Acids are very large organic molecules made of carbon, hydrogen, nitrogen, and phosphorous.
◊ Importance:
Nucleic acids contain the instructions that cells need to carry out all the functions of life.

18. ◊ Two types of nucleic acids:
1—DNA (deoxyribonucleic acid) carries genetic Information.
2—RNA (ribonucleic acid) is
important in protein
production.

19. E. The Other Elements (calcium (Ca) and iron (Fe))
Calcium is an important structural component. Bones and teeth contain calcium. It’s also critical in keeping body chemistry in balance.
Iron is important in the synthesis of hemoglobin, which is responsible for carrying oxygen in blood.