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| A solid nonliving substance that is made up of elements and is found in the earth is a |
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| The type of rock that forms when magma from a volcano cools and hardens on the earth's surface is |
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| The type of rock that forms due to pressure and heat within the earth is |
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| The type of rock that forms when tiny particles of older rock become cemented together is |
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| The three main types of rocks (igneous, metamorphic, sedimentary) are classified by |
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| to arrange by putting into classes or groups. |
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| One tool used by scientists to help classify rocks is a |
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| The process that causes one type of rock to become another type of rock is called the |
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| Fossils are often found in |
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| Most of the rocks in the Earth's outer layer are |
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| The age of the Earth is approximately |
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| Scientists can get information about past life on Earth and also about the age of rocks from |
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| The preserved remains of an ancient plant or animal is a |
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| The outermost, thinnest and most solid layer of Earth is the |
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| The solid center of the Earth is the |
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| The middle layer of the Earth, between the crust and the core is the |
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| The liquid layer of Earth between the inner core and the mantle is the |
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| The crust and the mantle of the Earth are made up mostly of |
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| The core of the Earth is composed of two very heavy elements called |
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| The gradual wearing or washing away of soil and rock by glaciers, water or wind is |
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| The breaking down of rock into smaller pieces is |
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| Sediment, clay, sand and rock fragments are some of the materials produced by |
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| The molten rock that rises from within the earth and explodes from volcanoes is |
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| The method used by scientists to determine the age of rocks that have fossils in them is called |
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| The Earth's crust and mantle are broken into large continent-sized slabs called |
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| A boundary of the earth's plates is called a |
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| The theory that the Earth's crust and upper mantle move across the Earth's surface due to convection currents in the partially melted mantle is known as |
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| When the edges of two plates buckle up at a convergent boundary, the formation that occurs is a |
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| A coming together or seeming to come together, or the place at which this takes place. |
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| A carrying or passing along, as of hear in air, gas, or liquid currents. |
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| Boundaries where the Earth's plates come together are |
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| A line or thing that marks the outside edge or limit. |
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| When two plates move apart and magma from within the Earth fills in the space between the plates, the formation that occurs is a |
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| When the edge of one plate at a convergent boundary slips beneath the edge of another plate and begins to melt, the formation that occurs is a |
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| When two plates meet at a fault, the Earth's surface stretches and compresses. This causes |
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| To press or squeeze closely together; press into a smaller place. |
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| Boundaries where the Earth's plates separate are |
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| Boundaries where the Earth's plates move horizontally past each other are |
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| Many scientists believe that the Earth's land masses moved across the Earth's surfaces into their present positions. This is called |
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