How do sedimentary rocks form?, From melted lava cooling down, From layers of sand, mud, and small rocks pressed together over time, From heat and pressure deep underground, From ocean water disappearing, What natural forces move sediments?, By animals carrying them, By people moving them, By wind, water, ice, and gravity moving them from one place to another, By the sun heating them, Why can't animals cross large oceans to reach other continents?, Because they don’t like water, Because oceans are too large and they can’t survive the journey, Because continents are moving too fast, Because animals are not allowed to travel, What is the rock record?, A list of the hardest rocks, Layers of rocks that show Earth’s history, A type of very old rock, A tool used to study rocks, Name one major geologic event that can be found in rocks., A volcanic eruption, An earthquake, A mountain forming event, A meteor (asteroid) impact, What type of environment does coal usually form in?, Desert dunes with strong winds, Deep ocean floor with high pressure, Swampy, wet, low-oxygen environments with lots of plants, Mountain peaks with cold temperatures, What is radioactive decay?, The process where atoms break down and release energy, The melting of radioactive materials, The freezing of atoms, The creation of new elements in a lab, What’s the difference between absolute and relative age?, They both mean the same thing, Absolute age is about fossils only, Absolute age tells exact years, relative age compares which is older or younger, Absolute age compares rocks, relative age gives exact years, What is “Half-life”?, The age of a rock, The full life of an element, The time it takes to create an element, The time it takes for half of a substance to decay

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