What is the constant forming breaking down and reforming rocks?

Why do plants need the process of photosynthesis and respiration to grow and develop? What are single cells that some plants produce instead of seeds? How long is 1 kilometers in miles? The p orbitals are shaped like? What is the type of plant that reproduces without seeds? What metal is used when the flame turns purple? What are the three roles of microscopic organism? How do the isotopes deuterium and tritium different? Are Tonga's islands on converging plate boundaries? Which describes what occurs during psychotherapist? Explain why scientists use models to to study atoms? What would you call a liquid at the end of a experiment? How many watts does a photocopier machine use? Where does light reaction occur in a of the chloroplast? How quickly does snow fall in the heaviest snow storm? Do flea bites always itch? How do you measure your croch start? What fiburus tissue has with cells? Which direction does the sun rise from Brisbane? What are all organisms made up of?