Answer:
(a) Muscle B contracts and muscle A relaxes
(b) The Heart
Answer:
nuclear science, marine science
1. the digestive system breaks down food and take the nutrients your body needs
The answer is A because the heart pumps blood from the heart through pulmonary artery that is low in oxygen and high in carbon dioxide concentration, to the lungs.
Answer:
cooling of lava or magma makes igneous
sedimentary rock is formed when sediment gets deposited, and is hardened by compaction and cementation.
any rock can turn into a metamorphic rock when exposed to extreme heat and pressure
