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Science 8th > Unit 1 > Flashcards

Unit 1 Flashcards

1
Q

What does a meter stick measure

A

Length in meters

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2
Q

What does a balance measure

A

Mass in grams

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3
Q

What does a thermometer measure

A

Temperature in degrees Celsius

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4
Q

What is the SI units

A

Kelvins

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5
Q

What does a spring scale measure

A

Force or weight in newtons

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6
Q

What does a spectrometer measure

A

Electromagnetic spectrums(makes rainbows)

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7
Q

What does a psychrometer measure

A

Humidity %

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8
Q

What do you call the curve and the graduated cylinder with water

A

The meniscus

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9
Q

How do you read the volume from the bottom of the curve

A

Always read at bottom of curve

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10
Q

Define density

A

Amount of matter in a given object/volume

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11
Q

What is in the triangle thing

A

M

D V

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12
Q

Define scientific model

A

A representation of an object or system

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13
Q

Name one example of a scientific model

A

Plastic fruit that looks real but does not taste real

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14
Q

Define physical models and give an example

A

They look like the things they represent

Ex: Barbie doll

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15
Q

Define a mathematical model and give an example

A

Used to predict something using symbols

Ex: weather map

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16
Q

What is the formula for speed

A

Speed equals distance divided by time

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17
Q

What is the formula for density

A

D equals M divided by V. Remember heart in half

18
Q

Define conceptual models and give an example

A

A model of an idea or theory

Ex: Big Bang theory of a blueprint of a building

19
Q

How are models used

A

To represent something very large or very small: and to help illustrate or explain a theory

20
Q

Define scientific law

A

A summary of many experimental results and observations

21
Q

When does a theory become a law

A

When it correctly projects the result of many experiments

22
Q

Define Theory

A

Proven through research

23
Q

What is the order to the scientific method(8)

A
  1. Observation
  2. Purpose/question/problem
  3. Research
  4. Hypothesis
  5. Experiment
  6. Organize data/analysis
  7. Conclusion
  8. Share results
24
Q

Define observation

A

Any use of senses to gather information

25
Q

Define hypothesis

A

A possible explanation or answer to a question

26
Q

Define a controlled experiment

A

Compares the results from a controlled with the results from one or more experimental groups

27
Q

Define data

A

They are pieces of information acquired through experimentation

28
Q

Define organizing data

A

When you organize data into charts or graphs to help make the relationship between information easier to see

29
Q

Define a conclusion

A

Oh conclusion must refer back to your hypothesis and they also guide what you do next

30
Q

What is the independent variable

A

Changed in an experiment

31
Q

What is the dependent variable

A

Result from the independent variable

32
Q

What does a graduated cylinder measure

A

Volume(milliliters)

33
Q

Define accuracy

A

How close a measurement is the true value

34
Q

Define precision

A

How close the measurements are to each other

35
Q

What are qualitative measurement

A

Words such as heavy or hot

36
Q

What are quantitative words

A

Measurements that involve numbers

37
Q

Significant figures in a measurement include

A

All of the digits that are known plus one more digit that is estimated

38
Q

Descriptive investigation and an example

A

Describe something

Ex weather

39
Q

Comparative investigation an example

A 
When you compare two or more things or compare one thing as it changes over time
Ex One class to another
40
Q

Experimental investigation and one example

A

When you add a variable

Ex adding weight to a chair

Science 8th (35 decks)

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