General Science Final
Earthquakes occur mostly where?
plate boundaries
A 5 kg box is sliding along a level floor. It is slowing down at a rate of 0.5 m/s2. What is the force of friction the floor is exerting on the box?
2.5N
A medicine ball has a mass of 10 kg and is thrown with a speed of 2 m/s. What is its kinetic energy?
20J
The law that states that every object maintains constant velocity unless acted on by an unbalanced force is
Newton's first law
The law that states that the unbalanced force acting on an object equals the object's mass times its acceleration is
Newton's second law
When objects are moved further apart from each other, the force of gravity
becomes weaker
The law of conservation of energy states that
cannot be created or destroyed
Subduction temp. of a star can be on what
color
A divergent boundary occurs where two plates
move away from each other
A zone where oceanic crust dives beneath continental crust is called a zone of
subduction zone
what is the stage after a supergiant
super nova
Hydrogen atoms combine to form
He
The equation for acceleration is
volume divided by time
A transform fault boundary occurs where two plates
will slide past each other horizontally
What is the acceleration of a car as velocity increases from 0 m/s to 20 m/s in 2 s?
10 meter per second square
What is the gravitational potential energy of a 40 kg box that is 3.0 m above the ground?
1176 J
The brakes on a car exert a frictional force of 8000 N in getting the car to stop. If the work done by the brakes is 100,000 J in coming to a stop, how many meters did the car travel after the driver applied the brakes?
12.5M
An object has a kinetic energy of 5000 J after falling a certain distance. If the mass of the object is 20 kg, what is the speed of the object at this time?
22.4 J
A man pushes a crate along a factory floor by exerting a force of 50 N. If the crate moves a distance of 5.0 m, how much work does the man perform?
250J
An object weighing 80 N is dropped from the top of a building and falls a distance of 35 m to the ground. How much work does gravity do on the object from the time it is dropped to the time it hits the ground?
2800J
Calculate the horizontal force that must be applied to a 1500 kg vehicle to give it an acceleration of 3.2 m/s2 on a level road.
4800N
A weightlifter presses a 200 N weight 0.5 m over her head in 2 seconds. What is the power of the weightlifter?
50 W
The efficiency of a ramp is 50%. If the amount of work input is 140 J, what is the amount of useful work output?
70J
Earth's temperature is moderated by its
Hydrosphere distance from the sun and atmosphere
The asteroid belt exists between Mars and
Jupiter
The tendency of an object at rest to remain at rest, or if moving, to continue moving at a constant velocity is
Inertia
Our solar system is what galaxy
Milky Way
In 1687-explained that gravitational forces hold the solar system together.
Newton
A geologic feature of divergent plate boundaries in oceanic crust is the formation of
Rift Valley
Earth's inner core is solid/liquid and hot/cold?
Solid and hot
A lunar eclipse occurs when positions of the sun, the moon, and Earth are such that one of these objects is between the other two. During a lunar eclipse, which object is between the other two?
The Earth
About 80 percent of Earth's volume is made up of
The mantle
Weight
The measure of the gravitational force exerted on an object.
The continental crust is deepest beneath
The mountains
All planets in the solar system revolve around
The sun
Oceanic crust is thinner or thicker than continental crust and also more or less dense?
Thinner and less dense
Most of the stars in the Milky Way galaxy will end there lives as
a white dwarf
Kepler correctly proposed that the planets orbited the sun in-orbits
elliptical
The inner planets are called terrestrial because they
have a compact rocky surface solid dense and rocks
A convergent boundary occurs where two plates
lithospheric plates collide
Earth's lithosphere is composed of
the brittle crust and the top part of the mantle upper mantle and crust
One hypothesis states that plate movement results from convection currents in the
the mantle
A geologic feature of divergent plate boundaries in oceanic crust is the formation of
the oceanic spreading ridges