WorksheetsPre-quiz: Unit 2 Earthquakes, Forces, and Energy
Total questions: 15
Worksheet time: 15mins
Name
Class
Date
1.
1. Where are you most likely to feel earthquakes?
a)
In the middle of continents
b)
Along plate boundaries
c)
Deep in the ocean
d)
Near volcanoes
2.
2. What happens when unbalanced forces act beneath Earth's surface?
a)
The Earth becomes perfectly stable.
b)
The land stretches but doesn’t break.
c)
Stress builds, cracking and breaking the land.
d)
Mountains immediately form.
3.
3. Which of these best describes why land moves on Earth’s surface?
a)
Magic!
b)
Tiny earthquakes we can’t feel.
c)
Forces from Earth's interior.
d)
Surface winds blowing dirt around.
4.
4. What keeps a solid stable when forces are acting on it?
a)
Balanced forces
b)
A solid’s weight
c)
Only vertical forces
d)
Rapid rotation of Earth
5.
5. If an object is stable, what can you say about the net force acting on it?
a)
The net force is greater than zero.
b)
The net force is zero.
c)
The object must be moving.
d)
Gravity stops affecting it.
6.
6. Why do we use the Pythagorean theorem in free-body diagrams?
a)
To calculate total energy.
b)
To determine the direction of gravity.
c)
To break forces into components.
d)
To make the math more exciting!
7.
7. When do solids deform or break under stress?
a)
When forces are balanced.
b)
When forces are unbalanced.
c)
When forces are removed.
d)
When gravity is zero.
8.
8. What happens when you remove forces causing elastic deformation?
a)
Solids explode.
b)
Solids stay deformed forever.
c)
Solids snap back to their original shape.
d)
Nothing happens—it stays the same.
9.
9. Why do unbalanced forces deep inside Earth cause surface changes?
a)
They create windstorms.
b)
They build up energy that leads to cracks and deformation.
c)
They make rocks grow larger.
d)
They make the crust softer.
10.
10. What happens when too much energy is stored in fields during elastic deformation?
a)
The solid stretches infinitely.
b)
Bonds break, and cracks form.
c)
Particles freeze in place.
d)
The energy vanishes.
11.
11. How do forces between particles lead to earthquakes?
a)
Particles throw energy at each other.
b)
Bond breaking causes big shifts.
c)
Particles stack neatly.
d)
Earth vibrates because of magic.
12.
12. How does energy move during elastic deformation?
a)
It moves through sound waves.
b)
It jumps randomly between particles.
c)
It transfers through fields, affecting particle bonds.
d)
It gets lost in the cracks.
13.
13. Why are some solids more likely to break under stress?
a)
They are heavier.
b)
They experience higher forces.
c)
They contain too much water.
d)
They are colder than usual.
14.
14. What key factor determines if a solid stays stable or deforms?
a)
The material's weight.
b)
Whether forces are balanced or unbalanced.
c)
The amount of sunlight it receives.
d)
The size of the solid.
15.
15. What part of a force diagram shows the most stability?
a)
Forces acting at angles.
b)
Forces that cancel each other out.
c)
Large arrows pointing upward.
d)
The color of the arrows.
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