MS-ESS1-2: Gravity's Role in Space

Front

Gravity Noun

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[grav-i-tee]

Back

Gravity

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A fundamental force of attraction that exists between any two objects that have mass, pulling them toward each other.

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Example: An apple falling from a tree shows gravity pulling it toward Earth.

Front

Mass Noun

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[mas]

Back

Mass

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The measure of the amount of matter or substance that makes up a physical object.

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Example: A balance scale shows a feather and a rock, illustrating that the rock has more mass.

Front

Orbit Noun

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[or-bit]

Back

Orbit

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The curved path an object in space takes around another object due to the force of gravity.

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Example: Earth's orbit around the Sun is shown as an elliptical path, illustrating the concept of 'orbit'.

Front

Gravitational Field Noun

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[grav-i-tay-shun-ul feeld]

Back

Gravitational Field

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The region of space surrounding a body in which another body experiences a force of gravitational attraction.

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Example: The image shows Earth's gravitational field pulling an object towards it, illustrating gravitational attraction.

Front

Acceleration of Gravity (g) Noun

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[ak-sel-er-ay-shun uv grav-i-tee]

Back

Acceleration of Gravity (g)

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The acceleration of an object due to the force of gravity, which is approximately 9.8 m/s² on Earth's surface.

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Example: Arrows pointing towards Earth show how gravity pulls objects towards the planet.

Front

Centripetal Force Noun

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[sen-trip-i-tl fors]

Back

Centripetal Force

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A force that acts on a body moving in a circular path and is directed toward the center of the circle.

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Example: Arrows show centripetal force acting toward the center of a circular path.

Front

Free Fall Noun

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[free fawl]

Back

Free Fall

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The motion of a body where gravity is the only significant force acting upon it, causing constant acceleration.

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Example: An apple falling from a tree shows free fall, where gravity is the only force acting on it.

Front

Escape Velocity Noun

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[es-keyp vuh-los-i-tee]

Back

Escape Velocity

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The minimum speed an object needs to break free from the gravitational pull of a massive body like a planet.

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Example: A rocket reaching the speed needed to break free from a planet's gravity.

Front

Tides Noun

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[tydz]

Back

Tides

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The regular rising and falling of the sea level caused by the gravitational attraction of the moon and sun.

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Example: The image shows how the moon and sun's gravity cause ocean tides on Earth.

Front

Big Bang Theory Noun

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[big bang thee-uh-ree]

Back

Big Bang Theory

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The scientific theory that the universe originated from a single, extremely hot and dense point about 13.7 billion years ago.

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Example: The image shows the universe expanding from a hot, dense point, illustrating the Big Bang Theory.

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