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Friday quiz 1 10/3/14
Prispevano od: Smith
 Distance and time
Time and mass
Force and distance
Volume and time
Which two measurements are needed in order to 
calculate the speed of an object in motion?
 in an upward direction.
at a constant speed.
faster as time went on.
for a short amount of time.
Which type of energy transformaton occurs when a 
flashlight shines?
Chemical→thermal→electrical
Thermal→chemical→light
 Chemical→electrical→light
Chemical→electrical→chemical
A force of 20N is applied to an object with a mass of 
10kg for 5s of time. If the object does not move, the 
total work done in this situation in Joules is-
0 J
50 J
100 J
200 J
A food          is a series of events in which one 
organism eats another and obtains energy. A food
          consists of many overlapping              .
chain, chain, webs
 chain, web, chains
web, chain, webs
web, web, chains
Because the top of ther energy pyramid has the least amount of energy and 
only very few organisms can survive on such a small amount of energy.
When you use an energy pyramid to diagram energy flow, why are there usually fewer organisms at the top?
Since organisms at the top of the energy pyramid all consume more energy
than organisms at lwoer levels, there can be only a few organsms at the top.
 Since so much energy is lost going from one level up, the energy available at
the top level can support only a few organisms.
Because the energy pyramid is narrower at the top, ther is much less space, 
and so there is room for only a few organisms.
Animal cells have cell walls and chloroplasts. Plant cells have lysosomes,
which are rarely found in animal cells.
Animal cells lack cell walls but have chloroplasts. Plant cells have ribosomes, 
which are rarely found in animal cells.
 Plant cells have cell walls and chloroplasts. Animal cells have lysosomes, 
which are rarely found in plant cells.
Plant cells lack cell walls but have chloroplasts. Animal cells have ribosomes,
which are rarely found in animal cells.
Which statement summarizes the differences between a plant cell and an 
animal cell?
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