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1

Speed

The distance traveled in a single unit of time

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2

Velocity

An object's speed in a particular direction

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3

Acceleration

Any change in an object's speed or direction.

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4

Inertia

How much an object resists acceleration

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5

Force

Any push or pull.

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6

Balanced forces

When two or more forces act on an object at the same time, and they cancel each other out.

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7

Unbalanced forces

When two or more forces are acting on an object, and one is not cancelled out by the other(s).

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8

Observation

Information about an object or event that is collected using your senses, or tools that help your senses.

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9

Inference

A conclusion you make based on observations and things you knew before.

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10

Quantitative data

Data that includes numbers and units.

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11

Qualitative data

Data that does not include numbers.

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12

Scientific error

Differences in data when the same thing is measured repeatedly.

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13

Newton's first law

An object will not change it's velocity or accelerate unless an unbalanced force acts on it.

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