1. Elements and our planet Earth

2. What do we already know?
There are more than 100 known elements. More than 90 of them are found in nature on Earth. The others can be produced in laboratories.

3. Elements:
a limited number of the many known elements comprise the largest portion of solid Earth, living matter, oceans, and the atmosphere.
SO What Exactly does this mean….

4. Which elements are most common on Solid Earth?
In Earth’s crust, the most common element is oxygen. The next most common is silicon, which is an important part of most rocks.

5. Which elements are most abundant in the Human body? Living Matter
Many compounds in living things include carbon. Hydrogen and oxygen are also important parts of these compounds. Sulfur and phosphorus occur in smaller amounts. Not all organisms have the same chemical composition. The graph shows the elements found in the human body.

6. Major elements found in all living matter:
The six most common elements in living things are carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur. Atoms of these elements combine and form thousands of large molecules. These large molecules make up the structures of cells and carry out many processes essential to life.

7. Which elements make up the Ocean?
The composition of Earth’s oceans varies from place to place. Since the oceans are mostly water, the elements hydrogen and oxygen are the most common. Sodium and chlorine are found in the salt in ocean water.

8. What element is most abundant in the Earth’s Atmosphere?
In Earth’s atmosphere, the most common element is Nitrogen. The next most common is oxygen, which is an important part of respiration for humans, animals and other living things.

9. What element is most abundant in the Earth’s Atmosphere?
Earth’s atmosphere is made up of a combination of gases, including nitrogen, oxygen, and carbon dioxide. They make up almost 99% of the atmosphere by mass. Argon makes up most of the rest of the atmosphere.

10. So What do you know?.....

11. Question #1
What total percentage of the human body is made up of oxygen, carbon, and hydrogen?

12. Question #2
Why are the structures of Earth’s crust and oceans different?

13. Question #3
What are the two main metals in the earth’s core?

14. Question #4
What is the second most common gas found in the air we breathe?

15. Question #5
How many naturally occurring elements are found on the earth in significant quantities?

16. Question #6
About 75 percent of the earth's solid surface is made up of...

17. Question #7
About 99 percent of the earth's atmospheric air is made up of...

18. Question #8
What are the main elements found in the human body?

19. Question #9
What are the main elements found in all living matter?

20. Brainpop: Sortify- Elements of the periodic table