to remember

• the relationship between distance and gravity is the further the distance, the less gravity affects
• the relationship between mass and gravity is that the larger the mass the more gravity affects ti
• an asteroid is a small rocky body orbiting the Sun
• the universe is 93 billion light years big
• the universe was created from a singularity to expansion, first particles, first atoms, first elements, first stars, continuous expansion
• the nitrogen cycle is nitrogen fixation, nitrification, assimilation, consumption, decomposition, denitrification
• the carbon cycle is photosynthesis, consumption, respiration, decomposition, fossilization, combustion
• gravitational forces include slab pull and ridge push
• solid sphere model was made by dalton
• energy levels in relation to atomic structure are where the electrons move along with different energy levels depending on how close they are to the nucleus
• plum pudding model was made by thomson
• commensalism is one organism is unaffected and one is benefited
• the life cycle of a massive star is nebula, protostar, main sequence, red/blue supergiant, supernova, white dwarf, black dwarf
• quantum model is made by Schrodinger and suggests electrons have no set position
• nuclear model was made by Rutherford
• the theory of plate tectonics shows that tectonic plates move around the lithosphere by mantle convection, which explains continental drift through the three different plate boundaries; convergent, divergent, and transform
• some scientists that helped create theories about space are Kepler, Copernicus, Galileo, and Newton
• atomic number is the number of protons in the nucleus
• atomic mass is the average mass of the protons and neutrons within an atom
• Atoms are the smallest unit of an element that cannot be broken down chemically.
• electrons have a relative mass of 0, while protons and neutrons have a relative mass of 1