Description

Which period ended 570 million years ago?
What was the first geological period in the Paleozoic Era
which scientific law says that the youngest of rocks layer is on top and the oldest is n the botom
which method to determine the age of earth materials uses radioactive elements
the determination of the age of an object with reference to a specific time scale is
The arrangement of artifacts to determine the age of that object
the largest division of geologic time
a period of time marked by a specific Characteristic
a point of time distinguished by a particular event
A large specified portion of time
a molten fluid rock that comes out of a volcano
A molten material beneath the earths crust
A vent in the earths crust through which lava
The two sub-layers of the earth's crust that move and float
the surface of the earth is broken up into ___________
a planar fracture
the study of earth is ____________
the process of witch the surface of the earth is being eroded
the chemical processes that cause exposed rock to decompose
organic matter deposited by water,
the state of being deposited or precipitated
lift up, raise or elevate.
a process in which new ocean floor is created
any of several seismically active submarine mountain
Rock that has formed through the deposition of sediment
Rocks formed by the solidifying of molten materials.
Rock that was once one kind of rock but has changed to another under the influence of heat
a process by which rocks are created
the outer layer of the earth
an remaining of a living thing as a skeleton or imprint
a widely distributed fossil

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Earth's History

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What is a crossword?

Crossword puzzles have been published in newspapers and other publications since 1873. They consist of a grid of squares where the player aims to write words both horizontally and vertically.

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Some of the words will share letters, so will need to match up with each other. The words can vary in length and complexity, as can the clues.

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Crosswords are a great exercise for students' problem solving and cognitive abilities. Not only do they need to solve a clue and think of the correct answer, but they also have to consider all of the other words in the crossword to make sure the words fit together.

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If this is your first time using a crossword with your students, you could create a crossword FAQ template for them to give them the basic instructions.

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We have full support for crossword templates in languages such as Spanish, French and Japanese with diacritics including over 100,000 images, so you can create an entire crossword in your target language including all of the titles, and clues.