mixtures compounds molecules states of matter phases of matter inner planets simple machines phonics deposition erosion weathering comparative adjectives present tense neurons chemical changes elements properties of matter atoms matter moon phases lunar cycle lunar phases rotation what causes day and night seasons energy transformations energy transfers law of conservation of energy potential energy kinetic energy items in a series solids liquids gases physical change chemical reaction gravity control variables dependent variable change variables volta alessandro volta battery inertia friction gears wheel and axle wedge inclined plane fixed mindset growth mindset vs fixed mindset becoming smarter growth mindset how to read a clock how to tell time tell time telling time clocks oceans continents correlative conjunctions subordinate conjunction subordinate clause main clause past tense declarative interrogative negative charge superlative adjectives adjectives reflex action nervous system involuntary action voluntary action nerves brain spinal cord affixes anti- -al using commas with conjunctions fanboys coordinating conjunctions the suffix -ic the prefix in- saturn gas giants ice giants neptune uranus jupiter jovian planets
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