6 Science PAT PREP Evidence and INvestigation Part 4

When compared with footprints left by a person who is running, footprints left by a person

who is walking are generally

• closer together with only the toe being clearly visible

• closer together with both the toe and the heel being clearly visible

• farther apart with only the toe being clearly visible

• farther apart with both the toe and the heel being clearly visible

At a robbery crime scene, police officers found pieces of torn fabric caught between the posts of a fence. Which of the following characteristics of the fabric can be most easily observed without either touching or removing it from the scene?

• Absorbency

• Durability

• Colour

• Type

The students in a Grade 6 class had their right index fingerprints analyzed. The results of the analysis are presented in the graph below. Which of the following conclusions could be correctly made about the Grade 6 class?

• Less than half of students have a right index finger with an arch fingerprint.

• More girls than boys have a right index finger with a loop fingerprint.

• Less girls than boys have right index fingers with whorl fingerprints.

• Most students have a right index finger with a mixed fingerprint.

Stacie’s class set up the shown chromatography experiment, what is the manipulated variable?

• colour of the pen

• length of filter paper

• type of black ink used

• volume of water added to the beaker

An investigator analyzes a piece of fabric that was found at a crime scene.Characteristics of Crime Scene Fabric are:

• Stretch 3.2 mm

• Flammability melts

• Absorbency 6 mL

He then compares the characteristics of the fabric with those of known fabric types.

The fabric that was found at the crime scene is most likely

• cotton

• fleece

• nylon

• spansex

Which of the following fingerprint characteristics is identified in the diagram above?

• Fork

• Lake

• Delta

• Island

A person entered a school after school hours and left dirty footprints on the custodian’s newly cleaned floors. The police took soil samples from the shoes of four suspects. The suspect who would most likely have left the footprints upon inspecting their shoe soil samples :

• 1 Leaves and pebbles

• 2 Pine needles and pebbles

• 3 Leaves, grass, and pebbles

• 4 Pine needles, sand, and pebbles

The heights of two poplar trees grown in different locations are recorded over a five-year period. Both trees have the same exposure to sunlight and receive the same amount of water. Both trees experience the same air temperature. The resulting heights of both trees are recorded in the graph below. The responding variable in this experiment is

• time

• tree height

• temperature

• amount of water given

The lumber industry mainly values forests as

• an important recreation area for humans

• an environment where many organisms live

• a producer of important gases to sustain life

• a source of primary resources and materials

Leroy found a log as he walked through the forest. As the log above decays, it will

• remove hydrogen from the air

• remove water from the air

• add nutrients to the soil

• add oxygen to the soil