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Grade 9 Studying > Science Unit 1 Test > Flashcards

Science Unit 1 Test Flashcards

Science Unit 1 Test

1
Q

What is science?

A

A systematic process (example: theories, experiments, analyses, conclusions) called the scientific method. There are many facets (aspects) to science

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2
Q

What are some non-scientific methods?

A

Intuition/belief
Consensus
Authority
Casual observation
Informal logic

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3
Q

What is intuition/belief?

A

Where a person strongly believes something is true and tries to impose their belief on someone else. They want to use their belief to prove a point

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4
Q

What is consensus?

A

When a majority of people agree on a common belief or idea. However, this is not a solid basis as facts are not based on a common agreement

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5
Q

What is authority?

A

The opinion of someone who has more knowledge, power and popularity who people tend to believe in more

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6
Q

What is casual observation?

A

A selective observation based on personal biases to obtain knowledge (everyone’s opinions on their observations may be different - they may choose to ignore certain things)

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7
Q

What is informal logic?

A

Using biased thinking to support an argument, often falling into logical fallacies. Statements in informal logic aren’t rigorously proved. It is also coming to conclusions without solid evidence

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8
Q

What is the purpose of a control test?

A

to establish a baseline

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9
Q

What is the purpose of a treatment test?

A

To see what changes

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10
Q

In the penny experiment, what are some of the variables you can change in the treatment test?

A

Chance the temperature (of the water and/or the environment)
Add salt to the water
Change the position of the penny
Add soap or detergent to the water

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11
Q

Explain the results of the penny experiment

A

Water is polar molecule (electrons are not evenly distributed)
Positive and negative charges will attract (intermolecular force)
When you add detergent it interrupts the bonds
Less surface tension, less cohesion between the drops
The detergent molecules limit the intermolecular forces

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12
Q

What are some elements that make a good graph?

A

Title (must be specific)
Axis labels
Data
The scale (the numbers)
A legend

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13
Q

What are SI units?

A

Stands for: System International

An international unit of measurement

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14
Q

What does the prefix giga mean?

A

10^9

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15
Q

What does the prefix mega mean?

A

10^6

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16
Q

What does the prefix kilo mean?

A

10^3

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17
Q

What does the prefix hecto mean?

A

10^2

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18
Q

What does the prefix deka mean?

A

10^1

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19
Q

What does the prefix deci mean?

A

10^-1

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20
Q

What does the prefix centi mean?

A

10^-2

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21
Q

What does the prefix milli mean?

A

10^-3

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22
Q

What does the prefix micro mean?

A

10^-6

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23
Q

What does the prefix nano mean?

A

10^-9

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24
Q

What does the prefix pico mean?

A

10^-12

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25
Q

What does HHPS stand for?

A

Household Hazardous Product Symbols

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26
Q

What does WHMIS stand for?

A

Workplace Hazardous Materials Information System

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27
Q

What is the difference between HHPS and WHMIS?

A

HHPS are usually on products you can find around the house and WHMIS are usually on items in the workplace

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28
Q

What variables go on which axis in a graph?

A

X-axis: independent variable

y-axis: dependent variable

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29
Q

Convert 20,000 cV to 200,000 ___V

A

mV

30
Q

Convert 2 kV to V

A

2000

31
Q

Convert 4 m to 40 ___m

A

dm

32
Q

Convert 6 Pa to 600 ___Pa

A

cPa

33
Q

Convert 8,000,000 cT to kT

A

80

34
Q

What is the scientific method? List the steps.

A

1) A Question or Problem is asked or stated.

2) Background Research

3) A Hypothesis is formed.

4) Develop the method/precedure

5) A list of Materials is stated.

6) The investigation is conducted and data is collected.

7) The data is analyzed.

8) Conclusions are drawn.

9) Results are communicated

35
Q

What is a hypothesis?

A

an educated guess about the result of the experiment based on the information learned during background research.

36
Q

What is the independent variable?

A

what scientists will change and/or test

37
Q

What is the dependent variable?

A

What is affected/is dependent on the independent variable

38
Q

What are controlled variables?

A

what stays the same between tests

39
Q

Why is a procedure important in an experiment?

A

It provides an objective, standardized approach to conducting experiments and, in doing so, improves their results. By using a standardized approach in their investigations, scientists can feel confident that they will stick to the facts and limit the influence of personal, preconceived notions.

40
Q

Explain the results of the paper helicopter investigation

A

the longer the blades, the more air resistance there is and the slower the helicopter falls

41
Q

What is air?

A

Air is an invisible mixture of several gases, water vapour, and impurities. The mixture of gases includes nitrogen (78%), oxygen (21%), carbon dioxide (0.3%), and other trace gases (0.7%). Among the trace gases, greenhouse gases are the most prominent.

42
Q

What are the SI units?

A

Kilogram

metre

second

ampere

kelvin

mole

candela

43
Q

What does the SI unit “kilogram” measure

A

mass

44
Q

What does the SI unit “metre” measure

A

length

45
Q

What does the SI unit “second” measure

A

time

46
Q

What does the SI unit “ampere” measure

A

electric current

47
Q

What does the SI unit “kelvin” measure

A

thermodynamic temperature

48
Q

What does the SI unit “mole” measure

A

amount of substance

49
Q

What does the SI unit “candela” measure

A

luminous intensity

50
Q

In HHPS, what is the border shape for “danger”?

A

Octogon

51
Q

In HHPS what is the border shape for “warning’

A

diamond

52
Q

In HPPS what is the border shape for “caution”

A

triangle

53
Q

What color is the border for WHMIS?

A

red

54
Q

What is the emergency power shut off button for?

A

In case of a spill or a gas leak, someone could push the button and then all equipment would be turned off and people can go clean the spill up or go find the source of the gas leak.

55
Q

What is the gas tap for?

A

For certain experiments, it may require a bunsen burner, which requires gas (methane) to operate. The bunsen burner can be hooked up to the tap and the gas can be turned on, allowing a flame to ignite when sparked.

56
Q

What is a funnel for?

A

When pouring substances from one container to another (especially when trying to pour into a small opening, a funnel helps by waking the mouth wider and making it easier to pour and can help reduce spills

57
Q

What is an eyedropper for?

A

For when you want a small amount of a substance. The eyedropper will allow you to add the substance one drop at a time

58
Q

What is the sink for?

A

Some experiments will require water, and some may require you to wash your hands before and/or after you are done. The sink provides the water for experiments and handwashing

59
Q

What is cleaning solution for?

A

For after an experiment, when you need to clean/wash the equipment used

60
Q

what are beakers for?

A

Used to transport substances, but you can also mix substances when using a glass stir stick.

61
Q

what are graduated cylinders for?

A

Used to measure substances

62
Q

What are test tubes used for?

A

Used in experiment to hold substances, mixing substances, and in some cases, even heating substances.

63
Q

What are safety goggles used for?

A

When doing an experiment, you may need to protect your eyes which these goggles will help you with.

64
Q

What are paper towel dispensers for?

A

to provide you with paper towels to clean or dry things

65
Q

what is the fire extinguisher for?

A

In case there are any fires, this will help make sure the school doesn’t burn down

66
Q

What is the eyewash used for?

A

In case chemicals get into someone’s eyes, they need to be washed out

67
Q

What is a volumetric flask used for?

A

measuring accurate volumes of liquid materials for laboratory experiments

68
Q

What is a wash bottle used for?

A

to rinse various pieces of laboratory glassware, such as test tubes and round bottom flasks

69
Q

what is a bunsen burner used for?

A

to heat substances

70
Q

What is a hot plate used for?

A

to perform chemical reactions, to heat samples, and for numerous other activities

71
Q

What is a scale used for (in lab)?

A

Analytical and precision balances

72
Q

What is a motar and pestle used for?

A

to grind up solid chemicals into fine powder and crush solids into smaller pieces

Grade 9 Studying (4 decks)

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