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WorksheetsCrime Busters Georgia Science Olympiad
Total questions: 15
Worksheet time: 15mins
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
What is the chemical formula for table salt?
NaCl
KCl
CaCO3
MgSO4
In forensic science, what is the purpose of using a control sample?
To provide a standard for comparison
To increase the speed of analysis
To reduce the cost of testing
To eliminate human error
Which of the following is a characteristic of a covalent bond?
Transfer of electrons
Sharing of electrons
Formation of ions
High melting point
What is the pH of a neutral solution at 25°C?
0
7
14
7.5
Which technique is used to amplify small segments of DNA?
Polymerase Chain Reaction (PCR)
Gel electrophoresis
Southern blotting
Western blotting
What is the main component of natural gas?
Methane
Ethane
Propane
Butane
