What is a boundary.
border or edge!
Whats lava?
magma that flows from a volcano!
How is a glacier formed?
Glaciers begin forming in places where more snow piles up each year than melts. Soon after falling, the snow begins to compress, or become denser and tightly packed. It slowly changes from light, fluffy crystals to hard, round ice pellets. New snow falls and buries this granular snow!
What does it mean when something expands?
How many layers does the earth have?
Four layers!
Whats a fault?
a break in Earth's crust where blocks of rock are moving in different directions!
Whats magma?
hot, liquid rock that comes from Earth's mantle!
What makes a glacier slippery?
Meltwater!
Whats weathering?
the breaking down or wearing away of rocks by water or wind!
List three facts about earths plates.
(At least get one right!)
There are eight large plates, they are always moving, they are broken into many irregularity shapes!
Name three ways that plates can cause earthquakes?
Colliding, moving apart, sliding past each other!
Whats a chamber?
a pocket under the volcano that fills with magma!
Whats a basin?
a large hole or depression in the ground that can contain water!
Whats erosion?
The moving of rocks and soil by water, wind, ice or gravity!
Whats the earths first layer called?
The crust!
A measure of the amount of energy released by an earthquake?
magnitude!
small pieces of broken rock, lava, and other materials blown out during an eruption.
A debris!
ridges of loose rock and soil created by a glacier and left behind when the glacier melts.
moraines!
Rainwater can carve ______ in the soil.
a channel!
Whats the mantle?
The mantle is the mostly-solid bulk of Earth's interior. The mantle lies between Earth's dense, super-heated core and its thin outer layer, the crust. The mantle is about 2,900 kilometers (1,802 miles) thick, and makes up a whopping 84% of Earth's total volume!
What tool records movement in the earths crust?
seismometer!
An opening in a volcano through which lava can flow?
A vent!
movement backwards.
retreat!
Over time, erosion and weathering can cause canyons to become __________.
deeper and wider!
Whats the difference between the outer core and the inner core?
Ones a solid and ones a liquid!