10.1 ANSWERS TO CHECK AND REFLECT
pg. 289
KEY CONCEPT REVIEW
1. Students’ answers may vary but could include the following:
a) ice, snow, hail, glacier, ice sheet, polar icecap, ice shelf, iceberg
b) ocean, river, stream, lake, pond, wetland, rain
c) water vapour, humidity
2. NOTE: For the Chapter 10 Quiz, you are expected to know that 97% of the Earth’s surface is
salt water and 3% of the Earth’s surface is fresh water. You are also expected to know the
various examples of fresh and salt water on Earth (locations on Earth category of the table).
Fresh Water
Salt Water
Less than 1 percent OR
3.5 percent OR higher than
extremely/very low salt
fresh water
concentrations
Freezing point
0°C
-1.8°C
Distribution on Earth
3%
97%
Locations on Earth
River, stream, lake, pond,
Oceans
wetland, ice, snow, glacier,
ice sheet, polar icecap, ice
shelf, iceberg
3. a) A watershed is an area of land where all the water (for instance, in its lakes, rivers, forests,
wetlands, and ground water) that flows across the land or through the land (such as from rain)
goes to a common water body such as a lake or river.
Salt concentration
-
b) The Rocky Mountains are the geographical boundary that creates a natural flow of water
toward one ocean or another. (They also collectively create a formation often called the
Continental Divide).
CONNECT YOUR UNDERSTANDING
5. Students’ answers may vary but could include the following: Spraying pesticides on your lawn
affects communities downstream because some of the pesticides run off the lawn into the storm
drains, which lead to a nearby river or lake. This flows to the communities downstream.
PRACTICE YOUR SKILLS
6. Sault Ste. Marie belongs to the Atlantic Ocean watershed.
7. The rivers in this watershed are all eventually flow to the Atlantic Ocean.