Crime Busters Georgia Science Olympiad

What is the primary purpose of chromatography in forensic science?

• To separate mixtures into individual components

• To measure the mass of a substance

• To determine the pH of a solution

• To identify the boiling point of a liquid

Which of the following substances is commonly used as a fingerprint powder?

• Talcum powder

• Graphite powder

• Baking soda

• Cornstarch

In a flame test, which element produces a bright red color?

• Sodium

• Potassium

• Calcium

• Strontium

What is the role of a catalyst in a chemical reaction?

• To increase the temperature of the reaction

• To decrease the activation energy

• To change the products of the reaction

• To increase the pressure of the reaction

Which of the following is a common method for detecting blood at a crime scene?

• Luminol test

• Benedict's test

• Biuret test

• Iodine test

What is the principle behind the use of DNA profiling in forensic science?

• Each individual has a unique DNA sequence

• DNA can be easily altered

• DNA is the same in all living organisms

• DNA degrades quickly after death

Which gas is commonly used in gas chromatography as a carrier gas?

• Oxygen

• Nitrogen

• Carbon dioxide

• Helium

What is the main function of a mass spectrometer in forensic analysis?

• To separate DNA strands

• To measure the mass-to-charge ratio of ions

• To detect radioactivity

• To analyze sound waves

Which of the following is an example of a physical change?

• Burning wood

• Rusting iron

• Melting ice

• Baking a cake

Tags

NGSS.MS-PS1-4

What is the chemical formula for table salt?