Content Benchmark E.8.A.3

Students know the properties of water that make water an essential component of the earth system. E/S

Sample Test Questions

1st Item Specification: Understand that water exists in all three states of matter on Earth

Depth of Knowledge Level 1

  1. Before evaporating, water found in the Colorado River, Lake Mead, and Lake Tahoe is in what phase?
  1. Solid
  2. Liquid
  3. Gas
  4. Plasma
  1. What phase is water in if it is found as a glacier?
  1. Gas
  2. Liquid
  3. Plasma
  4. Solid

Depth of Knowledge Level 2

  1. A difference between freshwater and a glacier is that the freshwater has
  1. molecules that are moving slower.
  2. molecules that are moving faster.
  3. one part hydrogen and one part oxygen.
  4. one part hydrogen and two part oxygen.
  1. Which of the following describes the phase changes necessary to occur when water changes from: ocean water  glacier fresh water  water vapor?
  1. Freezing  melting  freezing
  2. Freezing  melting  melting
  3. Melting  freezing  freezing
  4. Freezing  melting  evaporating

2nd Item Specification: Understand why ice floats on water and its impact on aquatic life

Depth of Knowledge Level 1

  1. A sheet of ice would float on a freshwater lake because ice
  1. is more dense than water.
  2. is less dense than water.
  3. has less volume.
  4. has less mass.
  1. What is the result when water freezes and turns to ice?
  1. It expands
  2. It compresses
  3. It is more dense
  4. It has less volume

Depth of Knowledge Level 2

  1. What is an effect of an ice sheet melting in the Arctic Sea?
  1. Gain in freshwater
  2. Loss of ocean water
  3. Loss of habitat for land species
  4. Gain of habitat for land species
  1. Answer the following question using the graph below.

Approximately how many species may exist if there is 70 sq. meters of ice?

  1. 5
  2. 6
  3. 7
  4. 8

3rdItem Specification: Know clouds, precipitation, glaciers and polar ice caps are all sources of freshwater

Depth of Knowledge Level 1

  1. Which of the following is NOT a source of freshwater on Earth?
  1. Glaciers
  2. Clouds
  3. Precipitation
  4. Oceans
  1. Which of the following processes would increase the available freshwater on Earth?
  1. Decrease evaporation of ocean water
  2. Decrease precipitation
  3. Increase melting of pack ice
  4. Increase precipitation

Depth of Knowledge Level 2

  1. Which of the following would result if polar ice caps, glaciers and icebergs melted as a result of global warming?
  1. An increase in volume of freshwater
  2. A decrease in volume of freshwater
  3. Adecrease in volume of ocean water
  4. An increase in salinity of ocean water

  1. Answer the following question using the data table, below.

Water Source / % of Total Water on Earth
Oceans / 97.2
Ice Caps/Glaciers / 2.38
Groundwater / 0.397
Surface Water / 0.022
Atmosphere / 0.001

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Based on the data above, the majority of water on Earth exists as saltwater. Which water source would increase the most if ice caps and icebergsmelt?

  1. Groundwater
  2. Surface water
  3. Atmosphere
  4. Oceans

Constructed ResponseE.8.A.3

Base your answers to the graph below which describes phase changes of water.

(From:

  1. At which temperature does ice begin to melt?What is the maximum temperature that pure liquid water can reach beforeit turns to water vapor?
  1. Describe what happens to the spacing and movement of water molecules as ice turns to liquid water then to water vapor.

Content Benchmark E.8.A.3

Students know the properties of water that make water an essential component of the earth system. E/S

Answers to Sample Test Questions

1. B, DOK level1

2. D, DOK level1

3. B, DOK level2

4. D, DOK level2

5. B, DOK level1

6. A, DOK level1

7. C, DOK 2level

8. B, DOK level2

9. D, DOKlevel 1

10. D, DOK level1

11. C, DOK level2

12. D, DOK level2

Constructed Response E.8.A.3 Score Rubric:

3 points / Response addresses all parts of the question clearly and correctly.
1. Ice begins to melt at 0 degrees Celsius. Water turns to water vapor at 100 degrees Celsius.
2. Water as a solid has molecules that are arranged in a pattern that keeps their spacing further apart then when it is in the liquid form and are moving slowly. As ice reaches a temperature of 0 degrees Celsius and melts, the molecules begin moving faster and move closer together compared ice. As water increased in temperature to 100 degrees Celsius, the molecules begin moving faster and becoming even further apart until they become water vapor at which time the molecules are very fast moving and free of each other.
2 points / Response addresses all parts of the question and includes only minor errors.
1 point / Response does not address all parts of the question.
0 points / The response is totally incorrect or no response provided.