When measuring distance, the base unit in the metric system is the
Which would be the best unit for measuring the distance from here to New York?
An object is moving at a speed of 4m/s. What does this mean?
it takes the object 1 second to make it 4 meters.
The speed measured over the entire duration of a trip is called
A car's speedometer measures
An object is moving at a constant speed of 16.7 m/s. At first it is moving straight north, but then changes and moves northeast. Has its velocity changed?
True or false: acceleration can be defined as both speeding up and slowing down.
Velocity is speed with what?
Acceleration is what?
a change in speed.
In the eraser lab, the erasers experienced ___________ against the desk.
Friction ___________ an object's speed.
True or false: all matter has gravitational force upon all other matter.
The smoother the surface, the _____________ friction there will be.
What is the purpose of opening a parachute while skydiving?
increase air resistance forces to slow you down.
Why would a skydiver reach terminal speed quicker lower in the atmosphere?
there is more air lower in the atmosphere and therefore more air resistance.
What shape is strongest to withstand weight?
Air resistance is a _____________ force between the air and the object moving through it.
force that opposes the motion of touching objects.
force between 2 objects that have mass.
also known as normal force, it is in an upward direction.
Two main categoriest of friction:
kinetic and static.
_________ is stronger than any other material in compression forces.
_________ is the force of gravity placed on an object.
Newton's first law is sometimes called the law of _________, which is the tendency of an object to do what it is currently doing.
The unit for force is
What happens to the acceleration of an object if more force is applied?
Imagine this scenario: a train is traveling at a high speed between a power plant and a coal mine. It arrives at the coal mine and loads up coal in almost every car. On the return trip to the power plant, what happens?
the mass of the train is more, so more force is required to get it to accelerate.
What happens to the acceleration of an object if its mass increases?
What is work?
applying a force, gettnig an object to move in the direction you applied the force.
Does the following situation involve work being done by the person: Jane is trying to push a dresser across the floor, but it's not moving.
Does the following situation involve work being done by the person: A child is trying to ride his bike up a large hill, but keeps rolling backwards.
____________ power is required to do work faster.
An inclined plane wrapped around a cylinder.
Consists of 2 disks or cylinders of different diameters.
wheel and axle.
A plane surface set at an angle against a horizontal surface.
2 inclined planes together to make a point at one end.
A rigid bar able to move around a fixed point.
Contains a wheel with a rope, belt, or chain around it.
__________ is the rate at which work is done.
Thing that lifts an elevator
wheel and axle.
wheel and axle or inclined plane AND a lever.
wheel and axle.
wheel and axle.
A combination of 2 or more simple machines is a _________ machine.
When using a wheel and axle, you have to apply _______(more or less) force on the wheel to turn it over a _______(longer or shorter) distance.
Changes the direction of input force. (fixed, moveable, compound)
Changes the diection and amound of input force. (fixed, moveable, compound)
Changes the amount of input force. (fixed, moveable, compound)
Energy is measured in
The energy of motion is called _______ energy.
True or false: the higher an object is, the more gravitational potential energy it has.
True or false: the more mass an object has, the greater its kinetic energy will be.
True or false: the more speed an object has, the less its kinetic energy will be.
True or false: all known objects have heat energy.
When a nucleas is split to produce energy, it is nuclear __________(fusion, fission)
What type of nuclear energy does the sun use to produce light and heat? (fusion, fission)
What element is primarily used in nuclear power plants to harness energy?
What is absolute zero?
a point at which all atoms of a substance quit moving and zero degrees Kelvin.
Stored energy is called __________ energy.
Energy is definded as the ______ to do work.
The unit for energy we commonly use for food is the ________.
What type of energy does a rubber band have when streched out?
What type of energy does a body of whater have at the top of a waterfall or dam?
A measurement of an object's heat energy is called ________.
The more heat energy an object has, the _______ the temperature will be.
A renewable energy source that comes from the heat of the earth is called _________(nuclear, geothermal) energy.
The energy of motion that can be seen on a larger scale.
The stored energy in the bonds holding atoms together.
Also known as light energy, this is a renewable energy resource.
The energy of moving atoms.
The stored energy that atoms have due to their height.
gravitational potential energy.
The energy of moving electrons.
The energer that objects have due to being stretched or compressed.
elastic potential energy.
The stored energy holding protons and neutrons together in the nucleas of an atom.
List the planets in order from the sun:
Pluto is now considered a ________ planet.
Which planet was named after the Roman mythical king of god's?
The death of a star is due to the fact that it eventually runs our of _______.
Stars are different from planets and moons because they make their own _______.
Which idea of arrangement of the solar system stated that earth was the center of the universe and all other objects revolved around it? (Galilean, Heliocentric, Geocentric)
Which model of the solar system is the one we use today? (Galilean, Aristotle's, Heliocentric)
Which of these is NOT an object in our solar system? (moons of planets, stars other than the sun, planets, the sun)
stars other than the sun.
True or false: the earth's moon has an atmosphere much like that of the earth.
We think our moon is filled with _______ because ______ that would burn up in earth's atmosphere don't burn up in the small amount of atmosphere the moon has.
The earth's moon has about 1/6 of the earth's gravitaional pull because _________.
Which things on earth are affected by the moon(2)?
A(n) __________ is a small object made of dust and ices that orbits the sun. When it gets close enough to the sun it starts to evaporate, leaving a tail behind itself.
A piece of an asteroid or comet that comes off and enters the gravitaional pull from a planet.
How long is a lunar phase?
about 28 days.
Pluto is in an area at the edge of our solar system called the __________. (Asteriod Belt,Kuiper Belt)
True or false: the gas giants rotate on their axis more slowly than earth.
True or false: the gas giants revolve around the sun more quickly than earth.
The outer planets are often called _________.
The inner planets are often called ________. (rocky, gas, terrestrials)
We believe that our sun, along with all other stars, formed from a huge cloud of gas and dust called a(n) _________.
Stars go through nuclear fusion of _______ to produce light and heat. (carbon, helium)
Our star, the sun, is considered a _______ star.
What stage is our sun in right now?
After a small-medium star completes its life cycle and has radiated all of its heat and energy, what remains is a solid, cold, spherical body called a(n) __________.
A small, solid, rocky body that orbits the sun is called a(n) _______. (asteriod, comet, meteorite)