Motion & Force
When is an object in motion?
When its position changes when compared to another object.
What is the speed of an object?
The distance the object moves per unit of time.
What is the 1st law of motion?
An object at rest will remain at rest unless after upon by a non-zero net force.
What is a volcano?
A structure that forms in Earth’s crust when magma reaches Earth’s surface.
What is an igneous rock?
A rock formed from cooled magma or lava.
What is a reference point?
A place or object used for comparison to determine whether something is in motion.
The formula for speed is…
Speed = Distance/Time
What is the 2nd law of motion?
Net force = mass*acceleration
Where do volcanoes form?
Convergent boundaries OR mid-ocean ridges.
What is a metamorphic rock?
A rock changed by heat and pressure
Why is motion relative?
Motion is determined by a reference point that can change.
What is instantaneous speed?
The speed at a particular instant in time.
What is the 3rd law of motion?
For every action, there is an equal and opposite reaction
At convergent boundaries, how do volcanoes form?
Trapped water leaves the sinking plate and mixes mixes with the mantle, melting it, and causing the buoyant magma to rise toward the surface.
What is a sedimentary rock?
A rock formed from sediment cemented together.
What is the unit strength of force?
A Newton.
How do you calculate average speed?
Total Distance/Total Time
What does the 1st law state?
An object moving at a constant velocity will continue moving at a constant velocity.
What is a chain of volcanic islands called?
A volcanic island arc.
What is crystallization?
The process by which atoms are arranged to form a material that has a crystal structure.
What is a force described as?
It’s strength and the direction in which it acts.
How do you calculate slope?
Rise/Run
What is the resistance to a change in motion?
Inertia
How do volcanic islands form?
When a volcano at sea grows large enough.
What results in a rock forming?
The energy that flows through the Earth’s system.