Abird species known as the cattle egret is often found near farms in wet areas. the bird waits, sometimes even perched on a cow's back, until the cow kicks up a frog or fish while it walks. then, the bird strikes and eats the exposed prey. this is an example of what kind of feeding relationship?
a. detritus
b. parasitic
c. mutualistic
d. herbivorous

What evidence is there that convection occurs in earth’s troposphere?

4. discuss additional factors that some planets have that affect their seasons. 5. what fact about other planet’s seasons most surprised you and what did you find the most interesting? why?

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?