Download Chapter 1.2-Spheres

Do Now
 Take 5 minutes to work on the DO NOW at the top
of the page
Activity
 Outside Investigation & Observation!!!!
 1st: When we get outside we will group together and
THEN break into pairs
 2nd: You will have 5 minutes to make observations
about your surroundings and write down what you see
on the small cards provided.
 3rd: After 5 minutes we will regroup and return to the
classroom
 4th : Take a seat with your lab partner and you will be
working with the group behind you.
 5th : As a group of now 4, you will group your
observations together into piles based on categories
you decide as a group.
 6th : Once your piles are set, raise your hand and I will
come over to check your work.
 7th: When all groups are finished you will receive
further instruction.
Objectives:
1. Compare and contrast Earth’s 4 spheres
2. Identify the components and elements found in
each sphere
3. Explain how the spheres interact and change
Biosphere
 Definition
 Includes all living things and their environments
Hydrosphere:
 Contains all the water in the Earth’s system
 Including oceans, lakes, rivers, streams, and water
in the atmosphere
Hydrosphere
 Only 3% is fresh water; over 70% of freshwater is
locked up in glacial ice
 All water on earth is continually recycled
 Using your ESRT, which element is found in the
greatest percent by volume in the hydrosphere?
Element:
1. Hydrogen
Percentage:
66%
Humans and the Hydrosphere
Atmosphere (troposphere)
 Definition:
 The blanket of gases surrounding the earth
 Using your ESRT (pg 14), what is the name of the
bottom layer of Earth’s atmosphere?
 Troposphere
Atmosphere & ESRT
 Use your Reference Tables “Average Chemical
Composition of Earth’s Crust, Hydrosphere and
Troposphere” on pg 1
 Which 2 elements are found in the greatest percent
volume in the Troposphere?
 Element:
Percentage:
1. Nitrogen
78%
2. Oxygen
21%
What is the purpose of the
atmosphere
1. Provide O2 to living things
2. Absorb, alter, block harmful solar radiation
3. Maintain constant temperature suitable for life
Geosphere / (Lithosphere)
 Solid earth from surface to
its center
 Contains: rocks layers,
mountains, continental
plates, minerals, ocean
basin
Geosphere / Lithosphere Pg 10 ESRT
 Made up of 4 general layers
 1. Crust
 A) lithosphere
 B) asthenosphere
 2. mantle,
 3. outer core,
 4. inner core
 Using your ESRT, which element is found in the
greatest percent by volume in the crust?
 Element:
Percentage:

1. Oxygen
94%
 Using your ESRT, which elements are found in the
greatest percent by mass in the crust?

1. Oxygen

2. Silicon
Why might Earth have a magnetic field?
 The Earth’s core is made of iron which has magnetic
properties (See ESRT Inferred Properties of Earth’s
Interior)