Physical sciene semster review

Supernova

Explosion of a big star

P-waves (5 km/s)

What is the fastes type of seismic wave

reduces the friction

How does a wheel and axle make work easier

Radio waves

Example of electromagnetic energy

Energy cannot be destroyed or created

What does the law of the conservation of energy state

F=Ma

What is the equation for force

Velocity is speed with direction

What is velocity and how is it different from speed

An object that isnt moving

What is a refrence point

Distance and time

What two factors affect an objects speed

Velocity

When graphed what measurment is slope of any distance time graph equal to

V=d/t

Equation for velocity

Rate at which veloctiy changes

Defintion for accelration

Decreasing change in speed

What is negative accerlation

time and veloctiy

What two facts affect accelration

accelration

When graphed what measurement is the slope of any velocity time graph equal to

Every second our speed is increasing

what does a postive accelration slope mean

a

what is the symbol for accelration

A=Vf-Vi/time

equation for velocity

m/s/s

Unit for accleration

Push or pull of an object

What is the definition of a force

Forward force

What does anf F→ mean

Friction

What does F

Weight

What does W or Fw mean

No movement

What does a balanced force mean

There is Movement

What does an unbalanced force mean

An object at rest stays at rest an object in motion stays in motion

Newtons first law

Force equals mass times accelration

Newtons second law

There is an equal reaction to every action

Newtons third law

Resistance to change movement (Lazy)

What is inertia

Friction always acts opposite to the motion

In what direction does friction react?

a force by which a planet or other body draws towards an object

What is gravity

Weight is the measure of force

What is weight

Mass is the quantity of matter

What is mass

Downwards

In what direction does weight act

9\.8m/s/s

What acceleration is given to the force of gravity

Newtons

What unit is force measured in

F

What is the symbol for force

W=Mg

What is the equation for weight

Quantity of motion

What is momentum

Snowball rolling down a hill

What is a real life example using momentum

P

What is the symbol for momentum

P=mv

What are the equations for momentum?

kgm/s

What unit is momentum measured in?

Move some distance in the direction of force

What is the definition of work

Force and distance

What two facts are used to calculate work

W

What is the symbol for work

W=Fd

What is the equation for work

Joules

What unit is work measured in

Ablility to do work

What is energy

Energy of an object in motion

What is kinteic energy

KE

What is the symbol for kinteic energy

Joules

What unit is kinetic energy measured in?

Energy of position

What is potential energy

PE=mgh or PE=wh

What is the equation for potential energy

PE

What is the symbol for potential energy

Joules

What unit is potential energy measured in

Hammering a nail

Example of Mechanical energy

warmth from the sun

Example of thermal energy

burning a fire

Example of chemical energy

Flashlights

Example of electrical energy

Electricity

Example of nuclear

Rate of doing work

What is power

Watts

What unit is power measured in

P

What is the symbol for power

P=W/t

What is the equation for power

Increases the force, increases the distance, changes the direction of the force

What are three ways a machine makes work easier

Increases the force

How does a pulley make a machine easier

Increases the force applied to an object

How does a wedge make work easier

Decreases the amount of force but increases distance

How does a screw make work easier

increases the force

How does a lever make work easier

reduces force but increases the direction

How does an incline plane make work easier

 allows humans to perform tasks much easier in terms of the force they need to apply

What is the purpose for calculating Ma

MA= output f/ input force

What is the equation for MA

MA

What is the symbol for MA

No units

Units of MA

Force is multiplied

If MA>1 then

Machine only changes direction

If MA=1 then

Distance is multiplied

If MA

igneous, sedimentary, metaforphic

What are three familys of rocks

3-5 cm per year

Approximately how fast do plates more

no

Do all plates move at the same speed all the time

Sea floor spearding, Age of sea floor, ocean trenches, mantle convection

5 pieces of evidence for the theory of plate tectonics

Crust, mantle, outer core, inner core

What are the four layers of the earth

Outer core is liquid inner core is solid

Which layer is solid which layer is liquid

Divergent, convergent, transform

What are main types of plate boundaries

Volcanoes

Where are divergent plates found

Mountains

Where are convergent plates found?

Earthquakes

Where are transform plates found?

Faster moving stream since it has more kinetic energy

Will fast moving stream or a slow moving stream be able to carry larger particles

Resistance to scratching and using Mohs scale

How is the hardness of a mineral estimated

Sedimentary rocks

In which family of rocks are fossils most likely to be found

Oxygen

The most abundant element in the earths crust is

liquid

S-waves cannot pass through

Solids

P-waves can pass through

Tidal waves- Shallow water by gravitonal pull

Tsunamis- Ocean wave triggered by large earthquakes

How are tsunamis and tidal waves different

P, S, and Surface waves

What are 3 waves produced by an earthquake?

Jerking motion that occurs while 2 objects slide past each other

What is the slip-stick motion and what does it cause

Focus

The zone of the surface of the earth where an earthquake originates is called the

Fault

The zone of the surface of the earth where rocks rupture or break due to an earthquake is called the

A volcano that is erupting or likely to erupt

Define Active volcano