Unit 3 TEST - The Ground Beneath Us

What is Earth’s deepest valley?

• the Bermuda Triangle

• the Grand Canyon

• the Mid-Atlantic Ridge

• the Mariana Trench

What is Earth’s thickest layer?

• the crust

• the inner core

• the mantle

• the outer core

What is the cause of Earth’s magnetic field?

• cosmic rays

• the gravitational attraction to the Moon

• the motion of iron within the liquid outer core

• sunspots

A compass needle points toward​ (a)  

• magnetic declination

• magnetic north
• the magnetosphere

• true north

What is the most common type of map projection we see?

• Polyconic projection

• Mercator projection

• Robinson projection

• Peters projection

What is latitude?

• the change in degrees of a compass reading from true north

• the distance in degrees of any point east or west of the prime meridian

• the distance in degrees of any point north or south of the equator

• the average height above or below sea level

What is the function (purpose) of contour lines on a topographic map?

• to connect points that are the same distance

• to connect points that are the same direction

• to connect points that have equal air pressure

• to connect points of equal elevation

What does the Mohs’ scale measure?

• the streak of minerals

• the hardness of minerals

• the cleavage of minerals

• the luster of minerals

Which of the following statements is NOT true of minerals?

• They are all inorganic

• They are all natural

• They are made of one or more key elements

• They are noncrystalline solids

When magma cools before it reaches Earth’s surface, what type of rock is formed?

• extrusive igneous rocks

• intrusive igneous rocks

• extrusive metamorphic rock

• intrusive metamorphic rock