1. Thursday, January 18, 2018
(Continue Discovery Education Unit - Studying the Hydrosphere; Concept - Ocean Water)

2. What is “salinity?” Describe the term as it applies to Earth’s oceans.
1/3
The Launch Pad
Thursday, 1/18/18
What is “salinity?”
Salinity is the amount of dissolved minerals in a given amount of water.
Describe the term as it applies to Earth’s oceans.
Ocean water averages 3.5% mineral content, or 350/oo ppt.

3. The Launch Pad 2/3 Thursday, 1/18/18
Determine the effects the following processes have on the salinity of the ocean water in their immediate area:
precipitation
decreases salinity
evaporation
increases salinity
formation of sea ice
increases salinity
melting of icebergs
decreases salinity
runoff from land
decreases salinity

4. The Launch Pad 3/3 Thursday, 1/18/18
What are the two major sources of dissolved minerals in our oceans?
chemical weathering of rocks on the continents and subsequent erosion and inflow from rivers
outgassing from volcanic eruptions

5. Announcements

6. Summative or Formative #
Assignment
Summative or Formative #
Date Issued
Gone Missing Day
Last Day Accepted

7. Continue Discovery Education Unit
Unit: Studying the Hydrosphere
Concept: Ocean Water
Go to and login.
Scroll down to the bottom of your homepage and click on the “Science Techbook” link.
Find the Unit titled “Studying the Hydrosphere” and click on it.
Choose the Concept titled “Ocean Water.”
Begin reading, watching the videos, and doing the activities.
When you reach the bottom of the page, click the NEXT button and proceed through the Concept.