Earthquake
What's the definition of earthquake?
Shaking of Earth's surface that can cause land to rise and fall.
What is the definition of volcano?
A mountain made of cooled lava, ash, or other materials from eruptions.
What is a flood?
A change that happens when streams, rivers, or lakes get too full and overflow.
A Glacier is...
A large, thick sheet of moving ice that slide along slowly.
What causes erosion?
The process of moving weathered rock and soil from one place to another.
Most earthquakes are too ________ to be felt, but strong earthquakes can cause a ______________ change to Earth's surface.
Weak, big
Melted rock is called ____________, it moves _________.
magma, upward
What happens to a cliff when waves crash against it?
The waves weather and erode the cliff.
Moving water carries rocks and ____________ downstream.
Soil
What is the process that makes a landform?
Delta
How long did the largest recorded earthquake last?
10 minutes, it was the Sumatran-Andaman earthquake
What's as big as a mountain with so much smoke that you can see it from space?
Volcano
What is the effect of a flood?
Entire towns can be destroyed.
Many plants may die and animals may have to find new homes.
Growing ____________along the riverbanks may become loose.
Plants
Weathering and erosion are two processes that _____________ the shape of Earth's surface.
Change
Why do earthquakes happen?
Two pieces of crust may push together, pull apart, or slide past each other.
What volcano erupted just after an earthquake.
Mount St. Helens
What happens during a landslide?
The sliding down of a mass of earth or rock from a mountain or cliff.
Tree _________ may be uncovered, causing the trees to fall.
Roots
What causes erosion?
Water, wind and ice
Where in the United states is the highest earthquake risk?
San Fransisco
What is melted rock on the Earth's surface called?
lava
What would be one reason why a lighthouse would need to be moved?
The land keeps getting smaller and smaller.
The rocks and soil may be deposited , forming a...
Delta
What is one benefit of Erosion?
Soil that is washed away from one place which can help plants in another place.