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