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Earth and Space Science Part 1. Abney Elementary K. Delaup. What are examples of the bodies of water found on Earth?. There are bodies of water found on Earth. They include: oceans, lakes, rivers, and streams. What is an ocean?.
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Earth and Space SciencePart 1 Abney Elementary K. Delaup
What are examples of the bodies of water found on Earth? • There are bodies of water found on Earth. They include: oceans, lakes, rivers, and streams.
What is an ocean? • Oceans are vast bodies of salt water that covers almost three fourths of the earth's surface.
What is a lake? • A lake is a large inland body of fresh or salt water.
What is a river? • A river is a large natural stream of water emptying into an ocean, lake, or other body of water.
What is a stream? • A stream is a steady flow of water; a small river.
How many layers make up the Earth? • The Earth is made up of three layers: crust, mantle, and core
What is the first layer of the Earth? • The crust is the layer of Earth we walk on. It is the thinnest layer. The crust features include mountains, valleys, plains, plateaus, and the ocean floor.
What is the name of the thickest layer of our planet? • The mantle(middle layer) is the thickest layer of the planet. Most of the mantle is solid rock. Some of the mantle is partly melted rock that flows like thick liquid.
What is the name of the layer deep inside the Earth? • Deep inside Earth is the core. The core is a dense ball made mostly of two metals, iron and nickel.
What is Earth made up of? • Earth is made up of materials such as rocks, minerals, and soil.
What are rocks made of? • Rocks are made of minerals.
What is soil made of? • Soil consists of rock and mineral particles mixed with organic matter.
What is a mineral? Minerals are solid, inorganic (not living) substances that are found in and on earth. Example of minerals are gold silver, copper, and gems. (Gems are cut and polished minerals.)
How do we test minerals? • Minerals undergo a hardness test to see how easily they scratch.
What is a fossil? • A fossil is the preserved remains of a plant, animal or other organism that lived on Earth long ago.
How do fossils form? • Most fossils form when an organism dies and is quickly buried by sediments. Eventually the sediments harden to form rocks. As time goes by, sediments form layers.
Are the oldest rocks always found at the bottom layers of the crust? • Sometimes the oldest rocks are not always at the bottom of the “stack.” Sometimes movement in Earth’s crust can twist or turn over stacks of layers so the oldest rocks might not be at the bottom.
What is a trace fossil? • A trace fossil is the preserved remains of the activity of an animal that lived long ago. Tracks, burrows, droppings, and worm holes are all trace fossils.
What does fossils do? • Fossils tell what the Earth was like long ago.
What do fossils tell? • Fossils tell what animals looked like long ago. Scientists study fossils and compare them to living things now.
What else do fossils tell? • Fossils tell how an animal moved. Fossil footprints can show how an animal walked. • Example: A T-Rex has four legs. The front legs were much shorter, so the animal probably walked on only two legs.
