Rougher surfaces have more friction between them than smoother surfaces.  If Mona is comparing sandpaper with notebook paper and she determines that sandpaper is rougher then notebook paper, which object has less friction sandpaper or notebook paper?
notebook paper


The pupil automatically gets bigger or smaller to let more or less light in as needed.  Will's pupils grew larger as the night grew darker. This happens to let less or more light in?
more


Q: Lighter, more streamlined vehicles need less energy.  If Jon subtracts more weight from his car, he will need to use less or more energy?
A: less


Question: The rocket goes upwards because the hot gases shoot downwards out of the nozzle. The faster the gases go downwards, the faster the rocket goes upwards.  Will launches a rocket off the ground. As the speed of the gas that comes from the boosters decreases, the rocket's height reached decreases or increases?
Answer: decreases


*Question*
A given volume of a denser substance is heavier than the same volume of a less dense substance.  Compared to a box of feathers a box of bricks would be lighter or heavier?
**Answer**
heavier


Q: Alkanes with more carbon atoms have higher boiling and melting points, so some of them are solids at room temperature.  Kathy did some experiments on two different alkanes and one of the alkanes had twice as many carbon atoms than the other. She would notice that which alkane would require a higher temperature to melt alkane with fewer carbon atoms or alkane with more carbon atoms??
A: alkane with more carbon atoms?