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Science Unit 1 Test Flashcards

Science Unit 1 Test (72 cards)

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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
What does HHPS stand for?
Household Hazardous Product Symbols
26
What does WHMIS stand for?
Workplace Hazardous Materials Information System
27
What is the difference between HHPS and WHMIS?
HHPS are usually on products you can find around the house and WHMIS are usually on items in the workplace
28
What variables go on which axis in a graph?
X-axis: independent variable y-axis: dependent variable
29
Convert 20,000 cV to 200,000 ___V
mV
30
Convert 2 kV to V
2000
31
Convert 4 m to 40 ___m
dm
32
Convert 6 Pa to 600 ___Pa
cPa
33
Convert 8,000,000 cT to kT
80
34
What is the scientific method? List the steps.
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
What is a hypothesis?
an educated guess about the result of the experiment based on the information learned during background research.
36
What is the independent variable?
what scientists will change and/or test
37
What is the dependent variable?
What is affected/is dependent on the independent variable
38
What are controlled variables?
what stays the same between tests
39
Why is a procedure important in an experiment?
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
Explain the results of the paper helicopter investigation
the longer the blades, the more air resistance there is and the slower the helicopter falls
41
What is air?
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
What are the SI units?
Kilogram metre second ampere kelvin mole candela
43
What does the SI unit "kilogram" measure
mass
44
What does the SI unit "metre" measure
length
45
What does the SI unit "second" measure
time
46
What does the SI unit "ampere" measure
electric current
47
What does the SI unit "kelvin" measure
thermodynamic temperature
48
What does the SI unit "mole" measure
amount of substance
49
What does the SI unit "candela" measure
luminous intensity
50
In HHPS, what is the border shape for "danger"?
Octogon
51
In HHPS what is the border shape for "warning'
diamond
52
In HPPS what is the border shape for "caution"
triangle
53
What color is the border for WHMIS?
red
54
What is the emergency power shut off button for?
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
What is the gas tap for?
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
What is a funnel for?
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
What is an eyedropper for?
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
What is the sink for?
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
What is cleaning solution for?
For after an experiment, when you need to clean/wash the equipment used
60
what are beakers for?
Used to transport substances, but you can also mix substances when using a glass stir stick.
61
what are graduated cylinders for?
Used to measure substances
62
What are test tubes used for?
Used in experiment to hold substances, mixing substances, and in some cases, even heating substances.
63
What are safety goggles used for?
When doing an experiment, you may need to protect your eyes which these goggles will help you with.
64
What are paper towel dispensers for?
to provide you with paper towels to clean or dry things
65
what is the fire extinguisher for?
In case there are any fires, this will help make sure the school doesn’t burn down
66
What is the eyewash used for?
In case chemicals get into someone’s eyes, they need to be washed out
67
What is a volumetric flask used for?
measuring accurate volumes of liquid materials for laboratory experiments
68
What is a wash bottle used for?
to rinse various pieces of laboratory glassware, such as test tubes and round bottom flasks
69
what is a bunsen burner used for?
to heat substances
70
What is a hot plate used for?
to perform chemical reactions, to heat samples, and for numerous other activities
71
What is a scale used for (in lab)?
Analytical and precision balances
72
What is a motar and pestle used for?
to grind up solid chemicals into fine powder and crush solids into smaller pieces

Grade 9 Studying (5 decks)

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