Midterm study cards

Questão	Responda
How would you define a science experiment?	An organized procedure under controlled conditions to study something.
List the steps on the scientific method?	Finding a problem/question from observations. Form a hypothesis. Plan an investigation. Collect and interpret data. Draw conclusions.
What is a scientific law?	A statement that tells about a natural phenomena and what is supposed to happen every time under certain conditions.
How is a scientific law different from a scientific theory?	A law tells and a theory explains.
What can cause theories to change?	New evidence and data from new experiments.
Why do scientists use models?	They use models for representations of things that are too small or large to see. Visual or mathematical models.
List the layers of the Earth:	Crust, mantle, inner core, outer core.
What is the lithosphere?	The solid, outer layer of the Earth. Consists of the crust and rigid upper part of the mantle.
What is the theory of plate tectonics?	The theory of plate tectonics is that the plates are constantly moving and changing and over time they form land forms and cause natural events.
Define continental drift:	All the continents used to be a part of one large landmass, and over time have drifted apart.
Define tectonic plates:	A part of the lithosphere that constantly is in motion.
Compare oceanic plates and continental plates -	Oceanic plates are thicker and denser than continental plates. Oceanic plates are under the ocean, continental plates are under the land. Both create the same land forms. They are both a part of the crust.
List three causes of plate movement	1. Mantle Convection 2. Ridge Push 3. Slab Pull
List the three types of plate boundaries	1. Divergent 2. Transform 3. Convergent
List the three classes of rock.	Igneous, sedimentary, metamorphic.
What is the rock cycle?	The process rocks go through, in which rocks form, change from one type of rock to another, are destroyed, and form again from geological processes.
How do tectonic plate motions affect the rock cycle?	Tectonic plates form new land forms, and then weathering and erosion and deposition form sediments.
What is a fossil?	The preserved remains or trace of remains of a once living organism. Mostly found in sedimentary rock.
What Earth’s processes can change Earth’s surface?	Weathering, erosion, and deposition.
How old is Earth?	4.6 Billion.
What can geologic changes tell us about Earth’s history?	What can geologic changes tell us about Earth’s history?
What can the rock layers tell us about life on Earth?	Rock layers tell us about life because the fossils tell us how life changed over time.
What is the Law of Superposition?	Younger rocks on the top, older rocks on the bottom.
What is the difference between relative and absolute dating?	Relative dating is finding the approximate age of a rock, like if it is younger or older. Absolute dating is finding the exact age.
What is a half-life?	Half-life is the amount of time it takes for half of the radioactive substance to decay.
How do you determine the absolute age of a rock?	Radioactive isotopes, radioactive dating
he higher the parent isotope percentage in a sample, the_____________ the sample is. The higher the daughter isotope percentage in a sample, the ______________ the sample is.	younger, body

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	Criado por McKynley Johnson 12 meses atrás