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45 Cards in this Set
- Front
- Back
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Liter
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The standard metric unit for measuring volume
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A conversion factor
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is used to convert one unit of measurement to another AND is a ration of two numbers
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Hypothesis
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an educated guess
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The first thing you need to do when using a triple beam balance is to
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zero the balance out
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The metric system
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The standard, international system of measurement used by scientists around the world.
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A good way to state a hypothesis is
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in the form of an if-then statement
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The following units of measurement are ALL metric units
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a. mm, in, ft
b. miles/hr c.mm, cm, dm, cL d. oz, l, lb |
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The correct metric unit of measurement for density would be
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a. grams per cubic millimeter
b. liters squared c. lbs, per cubic foot d. none of the above |
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The difference between precision and accuracy is:
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precision refers to close groupings whearas accuracy is measured against a known true value.
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In the gummy bear lab, precision was limited because of
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the tools we used such as the triple beam balance and our human eyes.
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A radar gun will measure a car's ________
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Instantaneous speed.
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Something is in _____ when it travels from point A to point B.
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motion
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When graphing speed, _____ is placed on the x-axis.
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Independent Variable
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When graphing speed, _____ is placed on the y-axis.
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Dependent Variable
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Speed with direction is said to be an object's _____
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Velocity
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When traveling in a car from Colorado Springs to Denver, if it took you 60 minutes to travel 60 miles your ____ is 60 miles/hour.
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Average Speed
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What does one Newton equal?
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The amount of force required to move a 1 kg object 1 m/s2
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If instantaneous and average speed were contrasted, then
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Instantaneous speed is equal to the speed taken at a single moment during the movement and average speed is equal to the speed over the whole trip
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A Skateboarder skates 10 meters North, 20 meters South, and then 5 meters North again. What is the skateboarders distance traveled? What is the displacement
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35 total meters & 5 meters South
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Choose the list of forces actiing on a skier who is traveling downhill that best fit.
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a. Gravity, Air Resistance, & Friction from the skies to snow.
b. Gravity, Centripetal Forces, & Natural Forces. c. Wind speed, Friction , & Applied Forces D. Friction, Gravity, & Applied Forces. |
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What is the difference between weight and mass?
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Weight is the amount of gravitational pull on an object and mass is found using a balance. Weight and mass are interchangeable on earth.
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The volume of a submerged object is equal to the ____ of liquid displaced
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volume
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The weight of a floating object is equal to the ____ of liquid displaced.
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amount
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If there is no movement, no ___ is done.
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work
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Any force that does not work in the ____ of the motion does no work on the object
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direction
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A ___ gives the worker an opportunity to multiple their work.
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mechanical advantage
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WHen an ____ is applied, the resultant force is uaually much greater and ic called the _____.
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input force; output force
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What condition must exist in order for a force to do work on an object?
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A distance must be traveled (height or length)
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A table exerts an upward force to support a plate of barbeque ribs resting on it. Does the force do any work?
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No, it does not do any work because the plate of ribs is not moving.
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What was Rube GOldberg most famous for?
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Being a famous cartoonist using simple machines.
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Name the six different simple machines.
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screw, inclined plane, lever, wedge, pulley, wheel, axle
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Name the different classes of levers
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1st class lever, 2nd class lever, 3rd class lever
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What is a combination of two or more simple machines that operate together called?
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Compound machine
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Doing work at a faster rate requires more ____.
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Power
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A ____ is what power is measured in.
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Watt
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The ____ energy of a moving object depends on its mass and speed.
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Kinetic
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An object's _____ ______ energy depends on its mass, its height, and the acceleration due to gravity.
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Gravitational Potential
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_____ energy is collected from dams and the ocean.
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Hydro electric
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____ energy is collected from the sun.
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SOlar
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What is the relationship between work and power?
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ENergy is the ability to do work and work is the transfer of energy.
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What did the Scottish Scientist, James Watt, do?
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He coined the term horsepower and discovered the amount a energy a horse could pull with.
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What are the six main types of energy?
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Mechanical, Thermal, CHemical, ELectrical, Electromagnetic, and Nuclear.
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What does the law of Conservation of Energy state?
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Energy can not be created or destroyed.
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What was it that made Albert Einstein famous?
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Albert Einstein is famous for his special theory of relativity and the equation E=MC2.
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What are fossil fuels?
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They are the remains of once living plants and animals.
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