Which of these is a demonstration of a chemical change?
a. ice melting into water
b. wood becomes charred and black from burning
c. water evaporates from a sugar solution, leaving behind sugar crystals
d. a balloon suddenly popping
explain the answer : )

Which type of fossil does this image depict?

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.

What would happen to a volleyball left outside in the winter? o o o o a. it would expand. b. it would lose air. c. it would shrink. d. it would explode.