Water management | Science homework help


Question 1 (4 points)

Which of the following water has highest density?

a. Lake water at 100 °C

b. River water at 20 °C

c. River water at 0 °C

d. Lake water at 4 DEGREE CELCIUS

2. Compare water evaporation from a natural water (e.g., a lake) with that from an evaporation pan set up nearby, which one has higher evaporation rate?

a. Natural water

b. Evaporation pan

c. About the same

d. Not comparable

Which of the following water flow form is NOT an incoming flow to a lake basin, when doing a water budget analysis?

a. Surface Runoff

b. Precipitation


d. Inflows

What gases you may NOT find dissolved in water at the bottom of ocean or lake?

a. Oxygen gas

b. Hydrogen Sulfide

c. Methane

d. Carbon Monoxide

What type of clouds usually indicates a good weather?

a. High Clouds

b. Middle Clouds

c. Low Clouds

d. Clouds always indicate bad weather

Which of the following statement is true about water molecular structure?

a. Water is alike to benzene because of the same polarity

b. Hydrogen and oxygen atoms in a water molecule are bonded together through covalent bond

c, Hydrogen bond is weaker at 4 °C than that at 100 °C

d. All above are true

Compressibility of the water is:

a. Small, but is not negligible.

b. Zero, water cannot be compressed at all.

c. Greater than that of air.

d. Totally dependent on the amount of substance that dissolves in water.

When measuring humidity with psychrometer, compare the dry bulb temperature with the wet bulb temperature when reading is stable:

a. Dry bulb temperature is high

b. Wet bulb temperature is high

c. The same

d. Depends on conditions

Which of the following crops has the highest transpiration rate?

a. Fescue grass harvested every two month during winter in Texas

b. Fescue grass harvested every two month during summer in Texas

c. Fescue grass harvested seasonally during summer in Texas

d. All about the same

What makes water unique in its properties when compared to H2S or H2Se?

a. Molecular weight

b. Hydrogen bond

c. Van Der Waal’s bond

d. None of the above

When do you expect to have highest humidity during a day?

a. Noon

b. Early morning

c. Evening

d. About the same

Which of the following conditions will affect the boiling point of water?

a. dissolved substance

b. atmospheric pressure

c. both a and b

d. neither a nor b

Which of the following statements is NOT true?

a. Evaporation is a heat absorption process

b. Evaporation can be used as a wastewater disposal method

c. Evapotranspiration cannot be estimated by evaporation pan

d. Evapotranspiration is a combination of evaporation and transpiration

Which of the following tools could be used to measure the evapotranspiration?

a. Thermometer

b. Lysimeter

c. Neutron probe

d. Psychrometer

Which of the following property of water explains the mild weather in coastal area?

a. high surface tension

b. water as an universal solvent

c. high boiling point

d. high specific heat

Explain how to use evapotranspiration to dispose wastewater.

Your answer:

Sketch out the structure of hydrogen bond in water molecule and label

 a. oxygen atom, 

b. hydrogen atom, and 

c. hydrogen bond.

Your answer:

At 20 °C, sugar has a solubility of 203.9 g, how much water we need at minimum to dissolve 100 g sugar?

Your answer:

Match following terms with corresponding phenomena.

Column A


Surface Tension:

Surface Tension





Minerals dissolve in water:

Minerals dissolve in water





Heat Capacity:

Heat Capacity

Column B

a.Water used for cooling and heating

b.Cold drink sweats in summer

c.Water level in straw is higher than that in glass

d.Outdoor statue outlines become blur

e.Water drips from faucet in spherical shape

Bonus Question 

List five processes that form the water cycle.

Your answer:

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