Forces that Change the Earth

A force that will work against motion in every situation is—

• the normal force
• weight
• gravity
• friction

During a tug-of-war competition, neither team is able to gain an advantage. Which of the following explains the forces in this situation?

• The forces are balanced.
• The forces are overcome by air friction.
• The mass of the rope cancels the forces being exerted on it.
• The forces are unbalanced.

What determines the identity of a Beryllium atom?

• The atom has 4 protons.
• The atom has a mass of 9 amu.
• The atom has 5 neutrons.
• The atom has 4 electrons.

The most reactive metal is one with -

• 4 valence electrons
• 1 valence electrons
• 2 valence electrons
• 3 valence electrons

Which of these landforms would most likely be found at a divergent boundary?

• fault line
• Mid-Ocean ridge
• Volcanic island
• mountain

Which scientist is credited for first proposing Continental Drift Theory?

• Albert Einstein
• Alfred Wegner
• Abraham Ortelius
• Harry Hess

Which two continents did Alfred Wegener think looked like they fit together like puzzle pieces?

• North America and South America
• Europe and Africa
• North America and Europe
• South America and Africa

Which of these landforms is most likely to be found at a convergent boundary?

• fault line
• mid-ocean ridge
• mountain
• rift valley

In an area known as The Ring of Fire, volcanic island chains have formed in the Pacific Ocean. What most likely caused this to happen?

• Convergent plate boundary
• Divergent plate boundary
• Transform plate boundary
• Mantle hot spot

Scientists believe that convection currents within the____ are responsible for the movement of the plates that form the Earth's crust.

• Asthenosphere
• Lithosphere
• Inner core
• Outer core