Page 52 - York Global Science 4 - Earth & Space
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Glossary
Glossary
Active volcano – A volcano that can erupt.
Continental plate – A plate under the land parts of Earth.
Crust – The rocky top layer of the Earth.
Deep ocean trench – A deep valley under the ocean.
Earth event – Something that changes the Earth.
Earthquake – When the ground suddenly moves.
Erosion – When wind, water or ice move rocks or rock particles to a different
place.
Fault – A long, thin space that can open in rock near the edge of a plate.
Flood – When water covers ground that is usually dry.
Fossil –The shape of a living thing from long ago left in a rock.
Gravity – A force that pulls things down.
Hazard – A danger.
Ice – Solid, cold water.
Igneous rock – A rock made when hot, liquid rock cools.
Index fossil – A fossil that helps us find out the age of rocks and other fossils.
Lava – The magma that comes out of a volcano.
Magma – Liquid rocks inside the Earth.
Map – A drawing of part of the Earth. It shows where things are.
Melts – When a solid gets hot and changes to a liquid.
Metamorphic rock – A rock made when other rocks change underground.
Mid-ocean ridge – A mountain range under the ocean.
Mountains – Very tall parts of the land.
Mountain range – A long line of mountains, e.g. Himalayas, Alps, Andes.
Mud – A brown material made from water mixed with soil.
Ocean – A large sea, e.g. Atlantic, Pacific.
Oceanic plate – A plate under the ocean parts of Earth.
Particles – Very small pieces.
Plates – Pieces of the Earth’s surface. They can move.
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