Which substance can be used to test whether a mystery powder is baking soda?

• Water

• Vinegar

• Salt

• Sugar

What happens to red litmus paper when dipped in an acidic liquid?

• Turns blue

• Turns red

• Turns green

• Disappears

What is the purpose of using chromatography in a CSI investigation?

• To test temperature

• To mix chemicals

• To separate and compare inks or dyes

• To grow bacteria

You find two hair strands at a crime scene. What tool is best to examine them?

• Ruler

• Bunsen burner

• Microscope

• Magnet

When you add iodine to starch, what color appears?

• Red

• Purple

• Blue-black

• Yellow

Which tool can be used to compare ink in a note and suspect's pen?

• Litmus paper

• Microscope

• Chromatography paper

• Thermometer

What happens when you add vinegar to baking soda?

• Nothing

• The liquid turns blue

• Bubbles and fizz form

• It melts

A hair strand is found at the scene. What feature should be examined under a microscope?

• Smell

• Sound

• Thickness and color

• Taste

A person with blood group AB can receive blood from which of the following groups?

• Only AB

• A, B, and AB

• O only

• A, B, AB, and O

What type of antibodies are present in the plasma of a person with blood group O?

• Only anti-A

• Only anti-B

• Both anti-A and anti-B

• No antibodies