A land form is a physical feature on Earth's surface.
100
Who is a geologist?
A geologist is a scientist who examines rocks to find out about Earth's history and structure.
100
What is an opening in Earth's crust?
A volcano
100
Where is the place where the slipping begins in an earthquake?
The focus
100
_______ weathering is caused by temperature changes, pushing, pulling, or rubbing.
Physical weathering
200
What is Earth's inner core made of?
Earth's inner core is made of solid metals.
200
What is magma?
Magma is hot melted rock in a volcano.
200
What are the three types of volcanoes?
Shield volcanoes, extinct volcanoes, and cinder-cone volcanoes.
200
What is the place called right above the focus?
Th epicenter
200
______ weathering is when chemicals break down rocks.
Chemical weathering
300
What are trenches?
Trenches are the deepest parts of the ocean floor.
300
What are fossils?
Fossils are the remains or signs of a once-living thing.
300
What is a stationary pool of magma called?
A hot spot
300
What happens when a large earthquake occurs underwater?
A tsunami
300
What is the process through which weathered rock is moved from one place to another.
Erosion
400
What is a relief map?
A relief map is a map that uses shading to show elevations.
400
As the ocean floor grows wider, the ______ move farther apart. What is ______?
continents
400
What is a line of volcanic mountains?
An island chain
400
What is a sudden shaking in earths crust?
An earthquake
400
What is the process which eroded materials are dropped off in another place?
Deposition
500
What are mid-ocean ridges?
Mid-ocean ridges are underwater mountain ranges.
500
Scientists have developed a theory called _______ to explain how forces deep within the Earth can cause ocean floors to spread and continents to move. What is ______?
Plate tectonics
500
What happens when ocean-floor plates are pushed under another ocean-floor plate?
An island arch is formed
500
A _______ is an instrument that detects and measures wave produced by an earthquake. What is ______?
A seismometer
500
What is particles of soil and rock that are carried along in water?