Where is our sun located in the Milky Way? O at the tip of one of the spiral arms
O within one of the spiral arms
O at the exact center of the galactic nucleus
O in the galactic halo

According to the cladogram, which organisms have roundworms as a common ancestor?

How do you date a sample of rock that you suspect as being one of the earliest on earth

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?