The power of light the human eye can perceive is known as ______________________________.

Unit of measurement for angles

Measure the reflection's brightness from a distance.

The lamp emits 120 units of luminous intensity.

A two-dimensional angle in a sphere is known as _____________________ angle.

A small recreation of a car would be a ______________________ model.

An equation that describes a system is called a ______________________ model

A simulation is ________________________________________.

Evidence gained by observation is __________________________.

A qualitative model _______________________________________.