I WONDER - Why Do Crystals Change Color?

The video tutorial explains how certain crystals can change color when exposed to light or heat, a phenomenon known as thermochromism and photochromism. It highlights examples of minerals like tourmaline and opal, as well as synthetic crystals that exhibit these properties. The tutorial also discusses practical applications, such as in thermometers and color-changing pigments.

What is the term used to describe crystals that change color when exposed to light?

• Thermochromism

• Photochromism

• Phosphorescence

• Bioluminescence

Which of the following minerals is known to exhibit color-changing properties?

• Tourmaline

• Quartz

• Diamond

• Graphite

What type of crystals, besides natural minerals, can show color-changing properties?

• Amorphous solids

• Organic crystals

• Synthetic crystals

• Metallic crystals

In which of the following applications are color-changing properties of crystals used?

• LED lights

• Batteries

• Thermometers

• Solar panels

Color-changing pigments are used in which of the following?

• Paints

• Food coloring

• Colored pencils

• Textile dyes