Thẻ ghi nhớ: Unit 3: Forces and energy (0893, Stage 7 Science) | Quizlet

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Last updated 11:58 AM on 4/15/26
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62 Terms

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Earth

Third planet from the sun

<p>Third planet from the sun</p>
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mass

A measure of the amount of matter in an object

<p>A measure of the amount of matter in an object</p>
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gravity

A force of attraction between objects that is due to their masses.

<p>A force of attraction between objects that is due to their masses.</p>
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acts towards the centre

gravity causes a force which pulls objects towards the centre of a planet or star

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force of gravity

a force of attraction which is an example of a non-contact force

<p>a force of attraction which is an example of a non-contact force</p>
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weight

A measure of the force of gravity on an object

<p>A measure of the force of gravity on an object</p>
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newtons

The unit of measurement for force and weight

<p>The unit of measurement for force and weight</p>
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contact force

a push or pull on one object by another that is touching it

<p>a push or pull on one object by another that is touching it</p>
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quantity

the amount of something; _________ is preferred in science to "amount"

<p>the amount of something; _________ is preferred in science to "amount"</p>
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kilograms

unit for mass

<p>unit for mass</p>
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formula triangle

a method of using an equation

<p>a method of using an equation</p>
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accurate

being close to a true value

<p>being close to a true value</p>
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observe

to see; to notice

<p>to see; to notice</p>
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formed

made or organized

<p>made or organized</p>
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evidence

facts that support or contradict a hypothesis

<p>facts that support or contradict a hypothesis</p>
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hypothesis

A testable prediction

<p>A testable prediction</p>
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orbit

the path of a planet around the Sun or a satellite (natural or artificial) around a planet

<p>the path of a planet around the Sun or a satellite (natural or artificial) around a planet</p>
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spin

the circular movement of a planet around its own axis, such as causes day and night on Earth

<p>the circular movement of a planet around its own axis, such as causes day and night on Earth</p>
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axis

An imaginary line that passes through Earth's center and the North and South poles, about which Earth rotates

<p>An imaginary line that passes through Earth's center and the North and South poles, about which Earth rotates</p>
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planet

A large body in space that orbits a star and does not produce light of its own

<p>A large body in space that orbits a star and does not produce light of its own</p>
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nebula

A large cloud of dust and gas in space

<p>A large cloud of dust and gas in space</p>
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model

A representation of an object or event

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support

Back up with details

<p>Back up with details</p>
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contradict

to speak against; to say the opposite

<p>to speak against; to say the opposite</p>
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circular

having the shape of a circle

<p>having the shape of a circle</p>
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speed

The distance an object travels per unit of time

<p>The distance an object travels per unit of time</p>
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air resistance

force that opposes the motion of objects that move through the air

<p>force that opposes the motion of objects that move through the air</p>
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vacuum

A space where no particles of matter exist

<p>A space where no particles of matter exist</p>
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depth

the distance from the bottom of the ocean to the surface of the ocean; how deep the ocean is

<p>the distance from the bottom of the ocean to the surface of the ocean; how deep the ocean is</p>
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harbour

an area of water near the coast where ships are kept and are safe from the sea

<p>an area of water near the coast where ships are kept and are safe from the sea</p>
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coastal

located on or near or bordering on a coast

<p>located on or near or bordering on a coast</p>
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tide

The periodic rise and fall of the level of water in the ocean

<p>The periodic rise and fall of the level of water in the ocean</p>
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tidal range

The difference in levels of ocean water at high tide and low tide

<p>The difference in levels of ocean water at high tide and low tide</p>
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Earth tide

the rise and fall of the land surface as a result of tidal forces

<p>the rise and fall of the land surface as a result of tidal forces</p>
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tidal force

the force from the gravitational pull of the Moon and the Sun that causes tides on Earth

<p>the force from the gravitational pull of the Moon and the Sun that causes tides on Earth</p>
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low tide

The time at which the tide reaches its lowest level

<p>The time at which the tide reaches its lowest level</p>
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high tide

The time at which the tide reaches its highest level

<p>The time at which the tide reaches its highest level</p>
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earthquake

The shaking that results from the movement of rock beneath Earth's surface.

<p>The shaking that results from the movement of rock beneath Earth's surface.</p>
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volcano

A weak spot in the crust where magma has come to the surface

<p>A weak spot in the crust where magma has come to the surface</p>
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force of attraction

A force that pulls objects together

<p>A force that pulls objects together</p>
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energy

the ability to do work

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transferred

passed from one place or form to another

<p>passed from one place or form to another</p>
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stored energy

energy contained in one place

<p>energy contained in one place</p>
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kinetic

relating to movement

<p>relating to movement</p>
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joule

the unit of energy

<p>the unit of energy</p>
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chemical energy

A form of energy that is stored in food and fuels

<p>A form of energy that is stored in food and fuels</p>
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electrical energy

Energy caused by the movement of electrons.

<p>Energy caused by the movement of electrons.</p>
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sound energy

Energy caused by an object's vibrations

<p>Energy caused by an object's vibrations</p>
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light energy

Energy in the form of moving waves of light

<p>Energy in the form of moving waves of light</p>
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thermal energy

The total energy of all the particles of an object.

<p>The total energy of all the particles of an object.</p>
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elastic potential energy

the energy of stretched or compressed objects

<p>the energy of stretched or compressed objects</p>
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gravitational potential energy

Energy stored by objects due to their position above Earth's surface.

<p>Energy stored by objects due to their position above Earth's surface.</p>
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fuel

a material that releases energy when it burns

<p>a material that releases energy when it burns</p>
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luminous

giving off light

<p>giving off light</p>
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changes in energy

when energy changes from one state to another

<p>when energy changes from one state to another</p>
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change

to make or become different

<p>to make or become different</p>
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process

A series of actions or steps taken to achieve an end

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event

anything that happens or is regarded as happening

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useful

helpful; energy changed in the way that we want

<p>helpful; energy changed in the way that we want</p>
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wasted energy

Energy that is not usefully transferred

<p>Energy that is not usefully transferred</p>
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dissipated energy

energy used up in a system, typically lost due to work done by friction, 'wasted energy'

<p>energy used up in a system, typically lost due to work done by friction, 'wasted energy'</p>
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recovered

collected and used again