Powders
Which powder has a chemical formula of CaCO3
Calcium Carbonate
Which soil can be rolled into a ball?
Clay
What are two uses of LDPE?
answers will vary
What charge does DNA have?
negative
What week in gestation do fingerprints develop?
23
Which powders cannot be used in mixtures?
Vitamin C, Yeast, and Sodium Acetate
Which soil has the highest permability? (sand, silt, or clay)
sand
Which polymer will burn green?
What does CODIS stand for?
Combined DNA Index System
Name 5 different minutiae
answers will vary
Which powders do not react with water, HCl, or IO2
sodium acetate, sugar, salt, sand
If a soil is made up of 30% sand, 80% silt, and 20% clay, what is it?
silty loam
Which is the only condensation polymer on our list?
PETE
Which two metals is bronze made out of?
copper and tin
What is the rarest type of fingerprint? (BE SPECIFIC)
Accidental
What is the most acidic powder?
Vitamin C
What does soil porosity measure?
Porosity or void fraction is a measure of the void (i.e. "empty") spaces in a material
What are recycling codes used for?
Recycling codes are used to identify the material from which an item is made, to facilitate easier recycling or other reprocessing.
How many strands of hair does the average person have?
100,000-150,000
On what layer of the skin are fingerprints?
Epidermis
1.53 g/cm^3
Which soil has the second smallest particle size and around how many mm in diameter is it?
silt, 0.05-2.00 mm
When was the first synthetic plastic created?
1907
What are the three steps of PCR?
denaturation, annealing, extension
How did police identify killers before fingerprints?
bone measurements