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Science 7th Grade Ch1 Sec1-3 > Chapter 1 Section 1-3 > Flashcards

Chapter 1 Section 1-3 Flashcards

1
Q

What is the condition of Earth’s Atmosphere at a Particular Time and Place?

A

Weather

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2
Q

What is the layer of gases that surrounds the planet?

A

Atmosphere

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3
Q

What makes the condition on Earth suitable for life?

A

The Earth’s Atmosphere

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4
Q

The Earth’s Atmosphere contains _______ and ______ _____ that living things need to live.

A

Oxygen; Other Gases

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5
Q

What is the Atomic Number of Nitrogen?

A

7

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6
Q

What does “Atomic Number” mean?

A

The number of electrons and protons

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7
Q

What is the Atmosphere made up of?

A

Mixture of Atoms and Molecules

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8
Q

What is included in the mixture that makes up the Atmosphere?

A 
N2
O2
CO2
H20
Vapor
Other Gases
Particles of Liquids and Solids
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9
Q

What is the Atomic Mass of Nitrogen?

A

14.01 AMU

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10
Q

“AMU” stands for:

A

Atomic Mass Units

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11
Q

The Scientific Method is

a. a set of questions and answers
b. a series of procedures used to solve a problem
c. a huge problem scientists have been trying to solve for hundreds of years
d. a series of scientific questions used in all areas of science

A

b. a series of procedures used to solve a problem

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12
Q

A Materials list is part of:

a. Hypothesis
b. Analysis
c. Experiment
d. Conclusion

A

c. Experiment

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13
Q

The ______variable is adjusted in an experiment

A

Independent

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14
Q

________ is using observations to explain something

A

Inference

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15
Q

The Control in an experiment is:

a. a standard for comparison
b. the factor that doesn’t change
c. the factor that depends on the independent variable
d. the factor that is adjusted by the experimenter

A

a. a standard for comparison

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16
Q

Nitrogen makes up ___% of the Earth’s atmosphere

A

78

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17
Q

What is the most abundant gas in the atmosphere

A

Nitrogen

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18
Q

What is essential to repair body cells

A

Nitrogen

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19
Q

Clouds form when ______ _______ condenses.

A

Water Vapor

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20
Q

What is the second most abundant gas in the atmosphere?

A

Oxygen

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21
Q

What is the Atomic Number for Oxygen?

A

8

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22
Q

The “Atomic Number” refers to the number of _______ and _______

A

electrons and protons

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23
Q

What is the symbol for Oxygen

A

O

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24
Q

Oxygen has how many AMU

A

16

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25
Q

Plants and Animals take Oxygen directly from ______ and use it as _____.

A

Air; Food

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26
Q

6CO2 + 6H2O -> C6H12O6 + 6O2

A

Photosynthesis

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27
Q

What are harmful substances in the air, water, and soil?

A

Pollutants

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28
Q

Pollutants are found in _____, ______, and ______.

A

Air, Water, and Soil

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29
Q

A brownish haze that is a mixture of ozone and other chemical formed when nitrogen oxides, hydrocarbons and other pollutants react with each other in the presence of sunlight - what is this?

A

Photochemical Smog

30
Q

A brownish haze that is a mixture of _______ and other chemical formed when nitrogen _______, hydrocarbons and other pollutants react with each other in the presence of sunlight - this is Photochemical Smog

A

ozone

oxides

31
Q

What is rain that contains more acid than usual?

32
Q

The amount of mass of an object

33
Q

The force pushing on an object.

34
Q

Air Pushing on an object

A

Air Pressure

35
Q

Instrument that measures air pressure

36
Q

Aneroid Barometer

A

A Barometer that Looks like a compass

37
Q

What is a mercury barometer?

A

Barometer that uses tube and dish

38
Q

What is “Altitude”?

A

Height above or below sea level

39
Q

The amount of mass to a substance to a given volume

40
Q

The force pushing on an area or surface

41
Q

A force that is the result of the weight of a column of air pushing down on an area

A

Air Pressure

42
Q

An instrument used to measure changes in air pressure

43
Q

An instrument that measures changes in air pressure consisting of a glass tube partially filled with mercury with its open end resting in dish of mercury.

A

Mercury Barometer

44
Q

A Mercury Barometer is an instrument that measures changes in air pressure consisting of a ____ tube partially filled with _____ with its ______ end resting in dish of mercury

A

Glass
Mercury
Open

45
Q

An instrument that measures changes in air pressure without using a liquid.

A

Aneroid Barometer

46
Q

How does the Aneroid Barometer work?

A

Changes in the shape of an airtight metal box cause a needle on the barometer dial to move.

47
Q

Motor vehicles and factories or power plants that burn coal or oil produce air pollution.

A

Sources of Air Polution

48
Q

Sources of air pollution include:

Motor vehicles and factories or ______ plants that burn _____ or ______produce air pollution

A

power
coal
oil

49
Q

Particles come from ____sources and _____ activity

A

natural

human

50
Q

Examples of Natural Sources are

a. lollipops
b. the coffee pot
c. forest fires
d. volcanoes
e. soil erosion
f. a and b
g. c, d and e

A

g. c, d and e

51
Q

Examples of Human Activities Include:

a. the burning of fossil fuels
b. farming
c. construction
d. lollipops
e. the wizard of oz
f. a, b, and c

A

f. a, b, and c

52
Q

_______ forms when particles in coal smoke combine with water droplets in humid air.

53
Q

________ ________ forms when Nitrogen oxides and sulfur oxides combine with water in the air to form nitric acid and sulfuric acid.

54
Q

Air has mass, therefore, it has ________.

55
Q

Density =

A

Mass/Volume

56
Q

Column of Air above you all of the time and is pushing down on an area

A

Air pressure

57
Q

If air pressure is falling what does that usually mean about the weather?

A

A storm is coming

58
Q

If air pressure is rising, what does that usually mean for the weather?

A

Weather is clearing

59
Q

What were the first barometers called?

A

Mercury Barometers

60
Q

The air pressure ________ as altitude increases.

61
Q

As air pressure decreases, so does _________

62
Q

If there is a stack of 10 books, which has more weight on it, the second book from the top or the book at the bottom?

A

Book on the bottom

63
Q

Think of the book example… Air at sea level is like which book?

A

The bottom book.

64
Q

Think of the book stack example…
The air near the top of the atmosphere is like which book from the top:
a. 2nd
b. Bottom

65
Q

Why is it harder to breathe at higher altitudes?

A

Air is less dense at high altitudes and there are fewer oxygen molecules to breathe in each cubic meter of air than at sea level.

66
Q

What are three properties of air?

A

Mass
Density
Pressure

67
Q

Air pressure decreases as altitude _______.

As air pressure decreases, so does __________.

A

Increases

Density

68
Q

A barometer is used to measure

a. smog
b. density
c. temperature
d. air pressure

A

d. air pressure

69
Q

The most abundant gas in the atmosphere is_____.

70
Q

True or False:

Plants need carbon dioxide from the atmosphere to make food.

Science 7th Grade Ch1 Sec1-3 (2 decks)

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