Mrs. wilson's exam for 6th grade at wilson hall study guide
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What's earth's revoilution | 30km/s
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| _____ is always used in science | metric
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| measures work | joule
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| a unit is eather ____, _____, or ______ | meter liter gram
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| change | convert
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| the distance the object travels in one unit of time | speed
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| what is the formula for speed | speed = ___distance___ time
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| means a steady pace | constant speed
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| speed and direction of an object | velocity
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| ___ _____ ________ must keep very close tracksof the velocity of air craft | air traffic controler
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| have the most stressful job | air traffic controler
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| the hard outer layer of the earth | lithosphere
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| dividing line | boundary
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| a push or pull | force
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| the overall force on an object after all the forces are added together | net force
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| equal forces acting on one object in oppisite directions | balanced forces
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| every object resist any change to its motion, the resistance is called _____ | inertia
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| the (SI) unit of mass is the ________ | kilogram
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| the amount of matter in an object | mass
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| the kind of stuff that all objects are made out of | matter
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| state newton's first law of motion | an object at rest will remain at rest and an object that is moving at a constant speed will continue moving at a constant speed unless acted upon by an unbalanced force
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| one ______ equal the force required to accelerate one kilogram of mass at 1 meter per second per second | newton
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| 1 kilogram weighs about ____ | 2.2 pounds
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| 1 kilometer equals ______ | .6 miles
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| a force that pulls down | gravity
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| forces working in oppostite directions | friction
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| a force that causes an obeject to move in a circle | centripetal force
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| any object that travels around another in space | satellite
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| the mass of a substancecontained in a unit of volume | density
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| a substance that can easily change shape | fluid
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| the ability to do work on an object | energy
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| name 3 types of friction | sliding, rolling, and fluid
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| two solid surfaces that slide over each other ; this creates most friction | sliding friction
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| friction that occurs when an object rolls over a surface | rolling friction
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| creates the least amount of friction | fluid friction
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| when the only force acting on a falling object is gravity | freefall
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| state newton's third law of motion | if one object exerts a force on another object then the second object exerts a force of equal strength in the opposite direction on the first object
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| an object that is thrown | projectile
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| state newton's 2nd law of motion | for every action there is an equal and opposite reaction
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| moving away from the center , force pushing an object outward away from the center | centrifugal force
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| the rate at which work is done | power
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| the larger the acre results in ____ downward pressure | less
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| air pressure at sea level is about ______ | 10.bn/cm2
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| at higher elevations there is ___ air above you | less
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| a break in the earth's crust where slabs of rock slip past each other | fault
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| gas trap | bubble
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| cave | cavity
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| upside down wing | spoiler
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| same bone structure but different function | homogenous structure
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| pencil lead | graphite
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| why does water expand when frozen | cause it forms a crystal
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| ______ is less dense than air | helium
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| _____ is less dense than water | ice
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| ______ have to travel faster than earth for orbit | satellites
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| the titanic departed from_____ in _______ | england 1912
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| takes place of | displace
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| put under water | submerge
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| weight = _______ | gravity
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| front of the boat | bow
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| back of the boat | stern
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| change | convert
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| what was wright brother's goal | to fly a plane heavier than air
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| where did they test their odd vechile | a deserted beach in kitty hawk north carolina
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| is a device with which you and do work in a way that is easier or more efficient | machine
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| what is the formula for work | F times D
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| the force you exert on a machine | input force
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| the force exerted by the machine | output force
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| is the output force a machine gives you to make work easier | mechanical advantage
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| compare the input work to the output work | efficiency of a machine
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| a machine who has an efficiency of ____ loses very little work | 95%
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| an ideal machine would have efficiency of ___ | 100%
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