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Description
Flashcards by McKynley Johnson, updated 5 months ago
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Created by McKynley Johnson
5 months ago
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| Question | Answer |
| 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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