Chp. 3 Forensic Lab Techniques Test A

A change in the size, shape, or state of matter.

• chemical change
• physical change
• chemical reaction
• electron change

Put the visible light colors in order from longest wavelength to shortest wavelength

• Violet, Blue, Green, Orange, Yellow, Red
• Red, Yellow, Green, Orange, Violet, Blue
• Red, Orange, Yellow, Green, Blue, Violet
• Blue, Violet, Green, Yellow, Orange, Red

chromatography separates the mixture of dyes on the basis of their ----------------------------

• density
• solubility
• gravity
• boiling point

Ink can be separated by a method of -----------------------------------------------

• distillation

• filtration

• chromatography

• sedimentation

What is the visible spectrum?

• a. The part of light waves we can see

• b. The part of light waves we cannot see

• c. the whole electromagnetic spectrum

• d. the energy spectrum

Which wave in the diagram has the greatest wavelength?

• 1
• 2
• 3
• 4

water is heated and changed to steam

• physical change
• chemical change

What kind of properties can only be observed when a substance changes into a different substance?

• physical properties
• chemical properties
• liquid properties
• real properties

Is burning wood a chemical or physical change?

• chemical
• physical

What color has the shortest wavelength and highest frequency?

• Violet

• Orange

• Red

• Blue