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MMWD Blog: Think Blue Marin

Welcome to our blog! Written by staff at MMWD, “Think Blue Marin” explores all things water in south and central Marin—water supplies, conservation, new projects, watershed management, and more.

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Jul 01

Pop Quiz

Posted on July 1, 2016 at 8:55 AM by Ann Vallee

by Charlene Burgi

It has been some time since a pop quiz appeared in the blog. Since I tend to like exercising my brain cells, I thought you may also find this challenge fun.

True or False

1. T    F    Typically plants that have silver-colored foliage use less irrigation water.
2. T    F    Lawns use more irrigation water than most any other plant in the garden.
3. T    F    Programming irrigation controllers is only necessary when installing.
4. T    F    Bulbs are a lot of work for the little time they bloom.
5. T    F    Plants listed as deer-resistant could be eaten by deer.
6. T    F    Bats are harmful to a garden.
7. T    F    The healthiest way to sheet mulch is to layer bark on top of black plastic.

Multiple Choice

8. Water weighs _________ pounds per gallon.
    a.    3.3    
    b.    5.7
    c.    8.35

9. Drip systems emit:
    a.    gallons per minute
    b.    gallons per hour
    c.    a or b, depending on the emitter

10. As water is piped uphill, water pressure:
    a.    increases
    b.    decreases
    c.    remains the same—elevation has nothing to do with water pressure

11. One inch of rain on a roof measuring 1,000 square feet equals __________ of rain water catchment.
    a.    55 gallons
    b.    120 gallons
    c.    600 gallons

12. A good combination of low-water plants is:
    a.    lavender, salvia, and rosemary
    b.    impatiens, cactus, and rosemary
    c.    all annual color

1-T, 2-T, 3-F, 4-F, 5-T, 6-F, 7-F, 8-c, 9-c, 10-b, 11-c, 12-a

Number Correct

1 - 4: Read more garden blogs
5 - 8: Garden is looking pretty healthy
9 - 12: Garden expert

Have a very happy 4th of July!


Anonymous User
July 1, 2016 at 10:38 AM
Loved the quiz. Keep em coming..... Could you please reveal the equation for question 11? I am a landscaper who's....not so good at math. Cheers
Charlene Burgi
July 8, 2016 at 10:43 AM
Great question! The formula is: square feet of impermeable surface x inches of rain x 0.62 gallons. So more precisely: 1,000 x 1 x 0.62 = 620 gallons.

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