Geography Crossword

what is the mantle layer of the earth made up of?
The Earth's crust is broken into pieces called what?
A person who studies earthquake activity is called what?
The point beneath the surface where the earthquake happens is called the......
Smaller tremors that follow an earthquake are called.....
What is the name of the scale used to measure the strength of an earthquake?
What does O stand for in OS maps?
What is the name of someone who creates maps for a living?
What is the name given to the vertical lines on OS maps?
What is the name given to the horizontal lines on OS maps?
What type of volcanoes have not erupted for a long time but might erupt again?
What type of volcanoes erupt regularly?
What type of volcanoes will not erupt again?
What instrument is used to measure tremors in the Earth's crust?
What is the name of the fault line in California?
How many active volcanoes are there in Ireland?
What is the name of the huge wave created by underwater earthquakes?
What is the highest mountain range in the world?
What is the name of the largest mountain range in South America
What type of mountains are created when two plates collide?
Magma rises up from a......