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exosphere > exosphere test 1 > Flashcards

exosphere test 1 Flashcards

1
Q

Which variable is changed by the person doing the experiment?

A

independent variable

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2
Q

a statement that can be tested; an educated guess

A

hypothesis

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3
Q

what is the first step in the scientific method?

A

ask a question/identify the problem

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4
Q

A scientist publishes the results of her experiments. Which science skill is she practicing?

A

communicating

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5
Q

true or false: A hypothesis is a fact about what will happen during an experiment

A

false

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6
Q

Which term is defined as the process of understanding the world around you?

A

science

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7
Q

A standard used for comparison

A

control

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8
Q

What is the last step of the Scientific Method?

A

draw a conclusion

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9
Q

What technology helps archaeologist to “see” a buried site before they begin excavating it?

A

radar

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10
Q

true or false: The first step in the Scientific Method is to identify the problem

A

true

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11
Q

Which term describes the step-by-step approach to solving problems?

A

scientific method

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12
Q

The factor being measured in an experiment

A

dependent variable

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13
Q

What step in the Scientific Method comes after you make your hypothesis?

A

conduct an experiment

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14
Q

Why do scientists make maps of archaeological sites?

A

to record where artifacts were found

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15
Q

true or false: The independent variable is the variable that is measured in an experiment

A

False

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16
Q

Which term describes a conclusion that is made about an observation?

A

inference

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17
Q

Bits of information you gather with your senses

A

observation

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18
Q

After collecting data, what is the next step in the Scientific Method?

A

analyze data

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19
Q

Why should an experiment be repeated?

A

to reduce the chance of error

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20
Q

Scientists do all of their work in laboratories

A

false

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21
Q

Which term describes factors in an experiment that stay the same?

A

constant

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22
Q

The use of knowledge gained through science to make products or tools people can use

A

technology

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23
Q

Which statement below is NOT part of the Scientific Method?

A

change the variables

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24
Q

What should an experimenter do after analyzing test results?

A

draw conclusions

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25
Q

true or false: excavating means to dig

A

true

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26
Q

how many centimeters in a kilometer

A

kilometer

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27
Q

how many kilometers in a meter

A

0.001

28
Q

what season is it in the northern hemisphere when the axis of the earth is tilted away from the sun

A

winter

29
Q

what is an astrolabe

A

astronomical instrument used to measure the angle of the stars or moon, an instrument we built in lab that we have to keep all semester, the precursor to a sextant

30
Q

Why would you weigh slightly more at the North or South Pole?

A

The poles are slightly flattened - you are closer to the center of gravity

31
Q

What is the mass of an object with a weight of 500N?

A

51 kg

32
Q

What is the definition of volume?

A

The amount of space ian object takes up

33
Q

At which point is the Earth closest to the Sun in its orbit?

A

perihelion

34
Q

What was Eratosthenes’ greatest error in his calculation of the Polar circumference of the Earth?

A

He thought the Earth was a perfect sphere

35
Q

What is eccentricity of an orbital path?

A

how elongated an orbit is, a value between 0 and 1 that measures the flattening or an orbit

36
Q

what is the true shape of the earth

A

oblate spheroid

37
Q

Which of the following values is the MOST oblate?

A

0.935

38
Q

What does the rotation of the Earth cause?

A

day and night

39
Q

How does the Earth’s revolution and tilt cause the seasons?

A

The tilt & revolution causes more direct sunlight on some parts of the Earth

40
Q
A
41
Q

What is unique about the summer solstice?

A

it is the longest day of the year

42
Q

what is the difference between mass and weight

A

weight is force due to gravity, mass is an amount of matter

43
Q

What is the difference between qualitative and quantitative data?

A

quantitative is based on measurements of data

44
Q

What is a scientific theory?

A

an explanation of scientific phenomena that is supported by evidence

45
Q

what is a scientific law

A

A description of scientific phenomena supported by evidence

46
Q

What is the formula for calculating speed?

A

speed=distance over time

47
Q

What is DISPLACEMENT?

A

How far away you are from where you started.

48
Q

what is the Perihelion

A

when the Earth is closest to the sun along its orbit

49
Q

what is aphelion?

A

when the Earth is furthest from the sun

50
Q

What are the science process skills?

A

verbs of science

51
Q

Science relies on empirical evidence, is a social and creative endeavor, is culturally embedded - What is this?

A

nature of science

52
Q

Eratosthenes is best known for…

A

Calculating the earth’s circumference

53
Q

In the metric system, 6 grams is equivalent to…

A

600centigrams

54
Q

What metric system unit compares to the English system quart?

A

liter

55
Q

What metric system unit compares to the English system unit yard?

A

meter

56
Q

what is a newton

A

a measures of weight or force in the metric system

57
Q

at what temperature is the boiling point of water

A

212

58
Q

At what temperature is the melting and freezing point of water?

A

0°C(32°F)

59
Q

The Earth completes one REVOLUTION around the sun every ________ days.

A

365.25

60
Q

The Earth completes one REVOLUTION around the sun every ________ days.

A

1 m/s

61
Q

What is the true shape of the Earth?

A

elliptical

62
Q

Who measured the polar circumference of the Earth?

A

Eratosthenes

63
Q

Why was Eratospthenes math on the circumference of the Earth just slightly off?

A

He used a perfect sphere to calculate the shape

63
Q
A
64
Q

What are four motions of the Earth?

A

Rotation, Revolution, Precession, and Chandler’s Wobble

65
Q
A

exosphere (2 decks)

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