Earth Science: The Water Planet, Book H

Chapter 2: Freshwater at Earth's Surface

Solve One-Step Equations

1
A small bay in a large lake averages 120 cm deep. How long will it take for the bay to become land if it drains at a rate of 0.1 cm per year?
A)130 y
B)1200 y
C)1250 y
D)1100 y
2
How long will it take a bay to fill at a rate of 0.3 cm per year if the bay is 100 cm deep?
A)360 y
B)125 y
C)333 y
D)350 y
3
A small bay in a large lake averages 130 cm deep. How long will it take for the bay to become land if it drains at a rate of 0.2 cm per year?
A)650 y
B)600 y
C)550 y
D)520 y
4
How long will it take a bay to fill at a rate of 0.2 cm per year if the bay is 125 cm deep?
A)640 y
B)600 y
C)660 y
D)625 y
5
A small bay in a large lake averages 115 cm deep. How long will it take for the bay to become land if it drains at a rate of 0.2 cm per year?
A)550 y
B)600 y
C)575 y
D)625 y
6
How long will it take a bay to fill at a rate of 0.15 cm per year if the bay is 130 cm deep?
A)910 y
B)900 y
C)845 y
D)867 y
7
A small bay in a large lake averages 125 cm deep. How long will it take for the bay to become land if it drains at a rate of 0.3 cm per year?
A)417 y
B)400 y
C)425 y
D)430 y
8
How long will it take a bay to fill at a rate of 0.1 cm per year if the bay is 160 cm deep?
A)1550 y
B)1600 y
C)1490 y
D)1225 y
9
A canoeing inlet has an average depth of 300 cm. The area is losing water at a rate of 5 cm/y. How long will canoes be able to use the inlet if the lowest water level is 100 cm?
A)38 y
B)35 y
C)40 y
D)39 y
10
A canoeing inlet has an average depth of 300 cm. The area is losing water at a rate of 5 cm/y. How long will canoes be able to use the inlet if the lowest water level is 150 cm?
A)30 y
B)35 y
C)40 y
D)38 y
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