Grade 7 Physics

Conductor- material or object that allows electricity and heat to pass through

Displacement- refers to the shortest route or distance taken by a moving object.

Distance- It is the length of entire path that the object travelled.

Frequency- number of waves passing at a single point for every second.

Electromagnetic wave- a wave that does not require medium to travel

Heat- An energy transferred from one object through another cause by the difference in its temperature

Insulator- materials that do not allow electricity to pass through

Intensity- Refers to the energy carried by sound wave.

Longitudinal wave- waves resulted from vibration of medium back and forth parallel to the direction of travel

Loudness- It describes how loud or soft the sound is; subjective to the listener

Luminous body- Objects capable of producing its own light

Motion- It is a continuous change in position with respect to a reference point.

Pitch- It refers to highness or lowness of sound; dependent on frequency

Reference point-Stationary position; starting point

Speed- It describes how fast or slow the object moves.

Sound-produced through vibration of medium

Transverse wave- when individual particles or segment vibrates up and down perpendicular to the direction of travel.

Temperature- measurement of how hot or cold an object is

Wave- periodic disturbance that moves away from the source and carries energy

Wavelength- A distance between 2 adjacent crest or 2 adjacent trough.