Assume that in an ecosystem, 90% of the available
energy is lost at each trophic level (level at which organisms are eaten
by those at the next level). If the producers (plants and photosynthetic
bacteria) capture 10,000 Joules per day, how much energy is available
to the 4th level of the food chain?
10,000 Joules
1,000 Joules
100 Joules
10 Joules
On Dune, after the duel with Paul, Jamis’s
body produced 33 liters of water for the sietch. Assuming that all the
water of Jamis's body was recovered, how many pounds did Jamis weigh?
(See your handout for conversions.)
55 pounds
37.5 pounds
121 pounds
182 pounds
Which process does human technology add to the
natural water cycle?
precipitation
evaporation
condensation
irrigation
At high desert temperatures (above human body
temperature), the energy required to cool the body through perspiration
is 207 Watts. A leg-worn device reported in the journal Science (comparable
to the energy pumping device of a stillsuit) harvests 5 Watts from walking.
Is this enough to run a stillsuit?
Yes, the stillsuit has 40 times the energy needed.
Yes, the stillsuit has 4 times the energy needed.
The answer cannot be determined from the data given.
No, the stillsuit needs 4 times as much energy.
No, the stillsuit needs 40 times as much energy.
Energy can be created.
True
False
In energy transformation, some energy always escapes
as
waste
heat
water
none because energy tranformations are always 100% efficient
There is no water in the atmosphere above deserts.
True
False
A dew collector invented
at the Hebrew University of Jerusalem collects dew nightly in a pan 1 square-meter
(m2) set on a roof at a 30-degree angle to horizontal. If the
pan collects 33 liters of dew per year, how much water does it collect daily?
90 liters
2.75 liters
2.75 ml (milliliters)
90 ml (milliliters)
If a person drinks 1.5 liters per day, how many
1-m2 pans would they need to collect all their drinking water?
Less than one pan
17 pans
265 pans
170 pans
Primary producers use what type of energy?
nuclear
solar
chemical
nuclear and solar
solar and chemical
What do you expect to happen to a fat-soluble
toxin as it travels through a series of consumers in the food chain?
It becomes neutralized.
It becomes more concentrated.
It becomes less concentrated.
The concentration stays constant.
What is the first step in the hydrological cycle?
condensation
evaporation
precipitation
disintegration
The water content of air at sea level can get
as high as 3% at 30 degrees C, but no more than 0.5% at 0 degrees. This
difference is due to the changing partial pressure of water vapor in air
as temperature changes. A conclusion you can draw from this is
Warm air can contain more water than cold air.
Cold air can contain more water than cold warm.
Air contains the same amount of water regardless of the
temperature.
No conclusions can be drawn.
Relative humidity is the measured amount of water
content of air divided by the maximum water content possible at that temperature.
Based on your conclusions in the previous question, if the relative humidity
is 10% in two different locations (e.g., the Sahara and the North Pole),
does this mean that the amount of water in the air is the same in these
two locations?
Yes, 10% is 10% no matter where you are.
No, because air can hold more water vapor at warmer temperatures.
In the United Kingdom, per capita consumption
of energy is 5200 Watts. Suppose energy use in the UK were to double every
twenty years. How much energy would each person use by the year 2100?