Which of the following has a greater density:
a bar of gold or a block of wood?
(assume that both the bar and the block have the same lengths, widths, and heights.)
bar of gold
they have equal densities.
block of wood
there is not enough information.

Ricardo notices that when he plays soccer in the rain, his ball does not seem to go as far after a kick. what is the best scientific question that ricardo could ask about this observation? is soccer better played in the rain or sun? how does rain affect the distance a soccer ball can travel? how does rain affect the speed of a soccer ball? is soccer affected by the rain?

Amniocentesis is a process in which amniotic fluid is taken from the mother's womb to identify any genetic abnormalities in the fetus. how would the discovery of the human genome contribute to this process?

Which enzymes break down carbohydrates?