Which of these questions is a scientific question about skateboarding?
o
a. how fast does a skateboard move at the bottom of a ramp?
o
b. should skateboarding be allowed in shopping malls?
o
c. what is the best trick to do while moving backward?
o
d. which color of wheel looks best?

What belongs in the areas marked x and y? x: the internal energy of a piston system increases as heat is added and rises to a cool area y: as thermal energy is added to a container, some of the energy is lost to the environment x: as thermal energy is added to a container, some of the energy is lost to the environment y: the internal energy of a piston system increases as heat is added and rises to a cool area x: a cold spoon placed in hot liquid gets warmer y: thermal energy is converted to light energy x: thermal energy is converted to light energy y: a cold spoon placed in hot liquid gets warmer