What is the spinning of a body, such as a planet, on its axis? O Revolution
O Rotation
O Axis
O Day

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

One function of the immune system is to attack the foreign cells to protect the body. in organ translate , the body recongnizes that the new organ is made of foreign cells. wha kind of medicine would you give a patient to increase the chances of transplate success

Identify two examples of chemical reactions that you have encountered during the last week. identify an exothermic and endothermic reaction. explain.