What type blood is the universal donor. what type blood is the universal recipient.

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?

Aflashlight battery is an example of a) potential energy b) kinetic energy c) thermal energy d) solar energy

Which of the following is a period in the paleozoic era? devonian cambrian permian all of the above