3. Which of the following is true about food webs? A. Food webs are not as realistic as food chains.
B. Food webs are not as good as energy pyramids because you cannot see how multiple components can be affected by an ecological event.
C. The predator(s) in a food web may be in more than one food chain because food webs show more feeding options.
D. Food webs are only useful in ecosystems with hundreds of organisms.

What prevents odyssey from killing the sleeping cyclops

Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.

Sally and sue were investigating the topic of friction in science. they used a small car and a ramp as seen in the picture to test what they were learning. they knew that they slipped easily on waxed floors but not on carpet, so they decided to change the material on the surface of the ramp to see what happened. they planned to use glass, carpet, aluminum foil, and sandpaper and run the car down the ramp over each surface. what would be the best research question to guide the girls' experiment? a) does the amount of surface area affect the friction on the moving car? b) will the car travel fastest on the glass surface? c) how does the angle of the ramp affect the speed of the car? d)do rougher surfaces tend to create more friction than smooth surfaces?