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Science Unit 2 Green

The Sun, Energy, and Atmosphere

QuestionAnswer
What can you estimate when measuring? You can measure one more digit than is given.
Does the sun ever reach zenith in Wellesley? No, the sun never is 90 degrees to Wellesley.
What gas makes up the sun? Mass of incandescent gases, copper, iron, carbon, nitrogen, helium (10%), and hydrogen (90%).
What is an element? A substance that cannot be broken down into a simpler substance by chemical or physical means.
How many elements are there in the periodic table? 112
What is earth mostly comprised of? Earth is mostly Oxygen and Silicon (but also Aluminum, Iron, Calcium, and Sodium)
What are elements made of? atoms
What are the main parts of an atom? central nucleus (protons and neutrons) and an electron cloud with little mass
What is nuclear fusion? When you smash two atoms' protons together
What is the formula for nuclear fusion? 4H-> 1He, 2H.......and gives off energy (E=MC^2)
Created by: korinna.garfield
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