Read the following scenarios. Then explain how natural selection will occur in each. Include the four principles of natural selection (overproduction of offspring, adaptation, variation, and descent with
modification) as well as what condition(s) drive natural selection,
1. Some worms eat at night (meaning they are nocturnal) and some
worms eat during the day (meaning they are diurnal.) Most birds
eat only during the day, so they are only eating diurnal worms, due
to the fact that the nocturnal worms are burrowing during this time.
Each spring when the worms reproduce about 500 offspring are
born but only 100 of them live long enough to reproduce
themselves,

Acceleration is a direct result of a.) balanced forces b.) unbalanced forces c.) gravity d.) velocity hurry!

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?

20 the main source of energy for our planet comes from the