Why does it become difficult to read old fossils?
a. older fossils are difficult to obtain because they’re extremely deep in the earth’s crust.
b. older fossils are biologically less important than newer ones.
c. older fossils provide less information about evolution.
d. older fossils are only formed by sedimentation.

What claim did thorne make? what evidence supported his claim?

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?

Explain how organisms could be harmed by high levels of salt from roadways?