Pre-flashcard: Unit 2 Earthquakes, Forces, and Energy

Front

Where are you most likely to feel earthquakes?

Back

Along plate boundaries

Front

What happens when unbalanced forces act beneath Earth's surface?

Back

Stress builds, cracking and breaking the land.

Front

Which of these best describes why land moves on Earth’s surface? Options: Magic!, Tiny earthquakes we can’t feel., Forces from Earth's interior., Surface winds blowing dirt around.

Back

Forces from Earth's interior.

Front

What keeps a solid stable when forces are acting on it?

Back

Balanced forces

Front

If an object is stable, what can you say about the net force acting on it?

Back

The net force is zero.

Front

Why do we use the Pythagorean theorem in free-body diagrams?

Back

To break forces into components.

Front

When do solids deform or break under stress? Options: When forces are balanced., When forces are unbalanced., When forces are removed., When gravity is zero.

Back

When forces are unbalanced.

Front

What happens when you remove forces causing elastic deformation?

Back

Solids snap back to their original shape.

Front

Why do unbalanced forces deep inside Earth cause surface changes?

Back

They build up energy that leads to cracks and deformation.

Front

What happens when too much energy is stored in fields during elastic deformation?

Back

Bonds break, and cracks form.