Glass and Soil Test

Which of the following is not a common ingredient of glass?

• Silica
• Carbon Dioxide
• Calcium Oxide
• Sodium Oxide

Bits of glass can fly backwards.  This is called:

• Backtrace
• Backspray

• Backflash
• Backscatter

Which glass break was made first?

• A
• B

What type of fracture is this?

• Becke
• Conchodial
• Concentric
• Radial

What will NOT be visible if a glass and a liquid has the same refractive index?

• Conchoidal Lines
• Becke Lines
• Fracture Lines
• Radial Lines

What is the 1st step for handling glass at a crime scene?

• Identify and photograph any glass samples before moving them. 
• Collect the largest fragments that can be reasonably collected
• Identify the outside and inside surface of any glass
• If multiple panes are involved, make a diagram

Soil is made of

• weathered rocks and minerals
• dead plants and animals
• air and water
• all of the above

Soil is formed by the breaking down of rocks by the action of wind, water and climate. This process is called

• Humification

• Weathering

• Soil erosion

• None of the above

Tags

NGSS.MS-ESS2-4

Which of the following is the correct order of soil particles in order of increasing particle size?

• clay-sand-silt
• sand-clay-silt
• silt-clay-sand
• clay-silt-sand

In what type of packaging should soil evidence be placed?

• plastic

• paper

• glass

• airtight