Science Starter… Convection currents are present in which layer of Earth? A. Core B. Mantle C. Crust D. Lithosphere.

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Presentation transcript:

Science Starter… Convection currents are present in which layer of Earth? A. Core B. Mantle C. Crust D. Lithosphere

Let’s Discuss… There are 2 types of crust. What are they? How are they different? 1. Continental Crust 2. Oceanic Crust Thickness

Friday Quiz Time!!!

8.Which of the following compositional layers makes up the greatest percentage of Earth’s mass? A.Continental crustC. Mantle B.Oceanic crustD. Core 9.The part of the earth that is molten is the A.CrustC. Outer core B.MantleD. Inner core 10.The part of the Earth on which the tectonic plates move is the A.LithosphereC. Mesosphere B.AsthenosphereD. Crust

Goals:  I can describe characteristics of the Earth’s three layers.  I can recognize that plates move continually at a rate of centimeters per year.  I can describe the relationship between plate movements and earthquakes, mountain building, volcanoes, and sea-floor spreading.  I can evaluate the impact of man’s use of earth’s land, water, and atmospheric resources.

Have you ever looked at a map of the world and noticed how the coastlines on opposite sides of the oceans appear to fit together like the pieces of a puzzle? Do you think it is just a coincidence?

Wegener’s Continental Drift Hypothesis

Alfred Wegener—scientist who wrote about his hypothesis of continental drift Continental Drift—hypothesis that says continents once formed a single landmass, broke up, and drifted to their current locations Pangaea—huge, single continent that existed about 245 million years ago

How did fossils provide evidence for Wegener’s hypothesis of continental drift?

Pangaea Current

Guided Imagery

What element would most likely be found in Layer C?

Lithosphere Asthenosphere Continental Crust Oceanic Crust Mantle Outer Core Inner Core