8th 1.1 Vocab
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Last updated over 2 years ago
19 questions
2
acceleration: a change in the _______ (speed, direction, or both) of a body
When any moving object goes _______, it is accelerating.
3
atmosphere: the _______ that surround a planet
These layers include ozone layer that protects us from _______ .
Greek roots: atmos meaning "_______ , steam"; sphaira meaning "globe, ball"
2
contact: the act of _______
An electrical _______ needs to have contact between the wires, battery, and light bulb. The contact allows electricity to flow.
2
Earth: the _______ planet from the Sun
Earth is the only place in the solar system that has everything we need to live - air, water, and comfortable _______ .
2
force: a _______ that is applied to an object
Fill up a balloon with air and then let it go. The air in the balloon quickly escapes and the balloon moves in the opposite direction. This is caused by the force of the _______ air.
2
frame of reference: an item against which the _______ of an object can be measured
A person standing at a bus stop sees the _______ of a car differently than the car’s passengers see the same motion.
2
friction: a force that _______ the motion of a body across a surface or through a gas or liquid
It is easier to walk on a dry surface than it is to walk on ice. You keep slipping on ice because ice has_______ friction
5
kinetic energy: the energy an object has due to its _______
An object's kinetic energy is one half the product of the object's _______ and the square of its _______.
Greek root kinetikos meaning "_______ , putting in motion" Greek root energos meaning "_______ "
2
kinetic friction: a _______ force between two objects moving pass each other
Objects that appear smooth are actually quite _______ when you examine them on a microscopic level, making it difficult for two objects to slide past each other.
Greek root kinetikos meaning "moving, putting in motion"
2
magnitude: size of ground movement caused by _______ due to energy released
During an earthquake, magnitude is measured on a logarithmic scale called the _______ scale.
3
mass: the amount of _______ in an object
A penny has a mass of about _______ grams. A big book may have a mass of _______ grams. It is much harder to toss a book than a penny. The book has more mass.
4
Newton's laws: the three _______ laws Isaac Newton discovered governing the motion of objects
Newton's first law states: "An object in motion _______ , unless acted on by a force. An object at rest stays at rest unless acted on by a force."
Newton's second law states: "Force is the product of _______ ."
Newton's third law states: "For every action force, there is an _______ reaction force."
2
orbit: the _______ of an object as it revolves around another object
Earth and the other planets in the solar system go around the Sun in _______ .
2
potential energy: the amount of energy that is _______ in an object; energy that an object has because of its position relative to other objects
When you stretch a rubber band, it’s ready to spring back. You’ve added potential energy to it. This energy might do something. But it isn’t doing anything yet. Once you let go, you release the _______.
2
speed: _______ traveled per unit of time
Speed is a measurement of _______ an object is moving. A slow-moving object covers a small amount of distance in the same unit of time. An object with no movement or at rest has a zero speed.
2
surface: the _______ of an object; the outside of an object; the boundary between two objects or materials
All _______ objects have surfaces.
2
velocity: the speed and _______ of moving objects
Speed is how fast something is traveling. Velocity is both the speed of the object and the _______ in which it is traveling.
2
weight: the force of _______ on an object
Earth’s _______ pulls everything toward its center. We call this pull weight.
2
work: a force applied to an object over a _______
How do you make a bicycle work? You need to get on the bicycle and use your legs to pedal. You transfer the energy in your leg muscles to mechanical energy through the pedals of the bicycle. The bicycle begins to move. You can move faster by working your muscles to transfer more energy and pedal faster. Work is the result of _______ that makes things happen.