Exploring the Measurement of Length and Motion - Vocabulary Flashcards (Grade 6)

Vocabulary-style flashcards covering key concepts from the notes on motion, measurement, and related tools and units.

Rectilinear motion

Motion along a straight line.

Oscillatory motion

Motion that repeats itself at regular intervals (periodic motion).

Circular motion

Motion along a circular path or around a center.

SI unit of length

Meter (m), the base unit of length in the International System of Units.

Ruler

A straight-edged instrument used to measure length, usually marked in cm or inches.

Measuring tape

A flexible measuring device used to measure around curves or body surfaces.

Rest

A state in which an object does not change its position with respect to a reference frame.

Motion

A change in an object's position over time with respect to a reference frame.

Arc length

The length of a curved path traced by an object; can be measured with string along the curve and then measured.

Relative motion

Motion observed from a chosen frame of reference; something can be at rest in one frame and in motion in another.

Curved path

A non-straight path that bends or curves, such as the arc of a pendulum.

Rotational motion

Motion of an object rotating around a fixed axis.

Needle oscillation

Up-and-down or back-and-forth movement of a sewing machine needle (oscillatory motion).

Cubit

An ancient, non-standard unit of length based on forearm length; not used as a modern standard.

Inches

A unit of length in the imperial system; 1 inch equals 2.54 cm.

Centimeters

A unit of length in the metric system; 1 cm = 0.01 m.

Unit conversion

Converting a measurement from one unit to another to maintain consistency.

Standard unit of length

A universally accepted unit for length (meter in the SI system).

Inconsistent units problem

When different parts of a task use different units (e.g., inches and centimeters), parts may not fit unless converted.

Responsibility

A value showing accountability; acting to report hazards and seek safe solutions.

Safety awareness

A value of recognizing hazards and taking precautions to avoid danger.