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Science > PAT > Flashcards

PAT Flashcards

1
Q

What does the term biological diversity refer to?

A

refers to the variety of life on Earth at all its levels

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2
Q

What are the main components of biological diversity?

A

refers to the variety of species and ecosystems on Earth

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3
Q

What does WHMIS stand for?

A

Workplace Hazardous Materials Information Information System

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4
Q

What is an example of compressed gas?

A

Oxygen Tank or Propane

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5
Q

What is an example of a reactive material?

A

Phosphorus or match head

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6
Q

What is an example of an oxidizing material?

A

Chlorine

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7
Q

What is an example of a poisonous and infectious causing immediate toxic effects material?

A

Pesticides

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8
Q

What is an example of a flammable material?

A

Gasoline

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9
Q

What is an example of a biohazardous material?

A

Virus or blood

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10
Q

What is the example of a corrosive material

A

Acid

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11
Q

What are the states of matter?

A

Solid, liquid, gas

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12
Q

What is it called when you go from solid to liquid?

A

Melting

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13
Q

What is it called when you go from liquid to solid?

A

Freezing

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14
Q

What is it called when you go from liquid to gas?

A

Evaporation

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15
Q

What is it called when you from gas to liquid?

A

Condensation

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16
Q

What is it called when you go from solid to gas?

A

Sublimination

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17
Q

What is it called when you go from gas to solid?

A

Deposition

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18
Q

What are the physical properties of matter?

A

Color, Luster, Melting point, Boiling point, Hardness, Malleability, Ductility, Crystal shape, Solubility, Density, Conductivity

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19
Q

When an object undergoes a physical change is anything new formed?

A

No

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20
Q

What does a chemical property describe?

A

How a substance reacts to other substances such as acids

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21
Q

What is formed in a chemical change?

A

A new substance

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22
Q

What are some examples of chemical properties?

A

Reaction with acids, Ability to burn, Reaction with water, Behavior in air, Reaction to heat

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23
Q

What is a element?

A

A material that cannot be broken down into any simpler substance

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24
Q

What is a compound?

A

When two or more elements combine chemically

25
Q

What is a mechanical/Heterogeneous mixture?

A

When the different substances that make up the mixture are visible

26
Q

What is a solution/Homogeneous mixture?

A

When the different parts that make it are not separately visible

27
Q

What is a suspension?

A

A cloudy mixture in which tiny droplets are suspended within another

28
Q

What are colloids?

A

A cloudy mixture in which the the particles of the substance are so small that they do separate out easily

29
Q

A chemical change occurs when…

A

Two or more materials react and create new materials. And have completely different properties from the original substance

30
Q

A physical change is one in which…

A

A material changes from one state to another

31
Q

What are some examples of chemical change?

A

Change in color, Change in odour, Formation of a solid or gas, Release or absorption of energy

32
Q

What are biological indicators?

A

Organisms in the water that can help determine water quality

33
Q

What are some biological indicators?

A

Fish, plants, worms, insects, plankton, Protozoa, bacteria, and viruses

34
Q

What are microbiological indicators?

A

Microscopic organisms such as bacteria

35
Q

What are invertebrates?

A

Insects without back bones

36
Q

The diversity of organisms decreases as acidity ….

37
Q

What is the concentration of chemicals usually measured in?

A

Parts per million or ppm

38
Q

What is spring acid shock?

A

When acid precipitation deposits build up in ice and snow in winter then in spring when it melts it flows into water systems

39
Q

What does spring acid shock affect?

A

The eggs of aquatic organisms and offspring as well as organisms living in the water

40
Q

What is toxicity?

A

Describes how poisonous a substance is

41
Q

What are toxins?

A

Poisonous substances that produce serious health problems when introduced to an organisms

42
Q

What is LD50?

A

Lethal dose 50 %. It calculates the lethal dose that will kill 50 percent of lab animals given the same amount of a toxin at the same time

43
Q

Clothes that are removed from a clothes dryer are sometimes stuck together

The example described above is most likely a result of

A

an imbalance of electric charges

44
Q

Joe watches television for 6.00 hours (21 600 seconds). The input power rating of his television is 200 W.

The total electrical energy consumed by the television during this time is

A

4 320 000 J

45
Q

In order to produce 100 000 J of heat energy, a hot plate consumes 800 000 J of electrical energy.

The efficiency of the hot plate is __________

46
Q

An electrical device with low efficiency is most likely producing waste

A

thermal energy

47
Q

describes a disadvantage of coal-fired electricity generation?

A

Emits pollutants into the atmosphere

48
Q 
Which   of   the   following   sources   of   energy   is   classified   as   renewable?
 A.  Natural   gas
 B.   Biomass
 C.   Coal 
D.  Oil
49
Q

WHat conditions of a circuit would be expected to cause the light bulbs to shine the brightest?

A

No resistor and 2 light bulbs

50
Q

Tungsten, a poor conductor, is used as a filament in some light bulbs because tungsten

A

resists the flow of electrons

51
Q

Which of the following substances is inorganic? A. Table salt
B. Peanut oil
C. Orange juice
D. Brown sugar

A

Table Salt

52
Q

The dissolved oxygen concentration of a pond is 8 ppm by volume.
This level of dissolved oxygen indicates that 8 mL of oxygen is found in

A

1 000 000 mL of water

53
Q

The number of mayflies decreases as the habitat quality of a stream declines.
The study of the number of mayflies can be useful to scientists for

A

biological monitoring

54
Q 
Which   of   the   following   events   is   an   example   of   a   chemical   change? 
A.  Liquid   nitrogen   evaporates. 
B.  A   candle   burns. 
C.  Water   boils. 
D. Ice   melts.
A

A candle burns

55
Q 
Which   of   the   following   substances   is   classified   as   a   solution?  
A.  Acid   rain 
B.  Table   salt 
C.  Helium   gas 
D. Baking   soda
56
Q

Which of the following statements describes a physical property of a substance?
A. Hydrochloric acid produces heat when mixed with zinc.
B. Phosphorous burns when exposed to air.
C. Lithium reacts violently with water.
D. Copper conducts electricity.

A

Copper Conducts electricity

57
Q

Which of the following measurements could be calculated by using the parallax technique?
A. Brightness of a celestial body
B. Temperature of a celestial body
C. Distance between two celestial bodies
D. Speed at which a celestial body is travelling

A

Distance between two celestial bodies

58
Q

The primary advantage of placing an optical telescope in space, rather than on Earth’s surface, is that it
A. enables the telescope to be maintained at cold temperatures
B. prevents distorted images that result from light and air pollution
C. decreases the distance from the telescope to the celestial objects being studied
D. decreases the telescope’s exposure to damaging electromagnetic radiation in the atmosphere

A

B. prevents distorted images that result from light and air pollution

59
Q 
Which   of   the   following   technologies   provides   the  least   information   about   celestial   bodies  in   our   solar   system? 
 A.   Telescope 
B.  Remote   sensing 
C.  Spectral   analysis 
D. Global   positioning   system
A

D. Global positioning system

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