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7 and 8 1st Sem Exams > 8 Science 1st SEM > Flashcards

8 Science 1st SEM Flashcards

0
Q

Well

A

Pumps water out of zone of aeration

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1
Q

Aquifer

A

A body of rock or sediment in the water

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2
Q

Spring

A

Water that flows through cap rock

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3
Q

Water table

A

Dividing both zones

Zone of aeration
Zone of saturation

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4
Q

Zone of aeration

A

Top zone in an aquifer

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5
Q

Zone of saturation

A

Below water table and zone of aeration

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6
Q

Watershed

A

Drainage basin

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7
Q

Water system

A

Many waters leading into a big body of water

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8
Q

Permeable surfaces

A

Lets water pass through

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9
Q

Impermeable

A

Does NOT let water pass through

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10
Q

Condensation

A

Water going up into the atmosphere

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11
Q

Evaporation

A

Liquid to gas

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12
Q

Percolation

A

Water in roots

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13
Q

What powers the water cycle?

A

Energy from sun

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14
Q

Some water quality measures

A

Wells and dry wells

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15
Q

Surface currents in the ocean

A

Wind and sun

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16
Q

Solid

A

Define shape and volume

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17
Q

Liquid

A

Has no define shape

Has define shape

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18
Q

Gas

A

No define shape or volume

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19
Q

Compound

A

A pure substance

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20
Q

Physical properties/changes

A

Melting point, density, color

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21
Q

Chemical properties/change

A

Reacts w acid

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22
Q

Density

A

Ratio of a mass of substance to volume of a substance

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23
Q

Boiling point

A

Liquid to a vapor

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24
Melting point
Solid becomes a liquid
25
Freezing point
At which a substance has tight monetary molecules
26
Condensation point
Boiling
27
Weight vs mass
Mass is not a measure of weight, it is the measure of how much something has
28
Endothermic
Heat entering a substance
29
Exothermic
Heat exiting
30
Equation for density
Mass divided by | Volume equals Density
31
Physical changes are.....
STATE changes
32
Chemical changes are.....
Reactivity
33
Atom
Smallest unit of life Building blocks of life
34
Nucleus
Center part of atom
35
Proton
Positive charge
36
Neutron
No charge
37
Electron
Negative charge
38
Electron cloud
Region around nucleus and holds the electrons
39
Mass number
Sum of protons and and neutrons in nucleus
40
Atomic number
Number of only protons in nucleus
41
Ion
When electrons and protons are not equal
42
Isotope
Same number of protons not NEUTRONS
43
Atomic mass
Mass media f ate m expressed in atomic units
44
Metals
Conducts heat and electricity WELL
45
Non metals
Conducts heat and electricity POOR
46
Period
Horizontal row on periodic table
47
Group
Vertical group on periodic table
48
Covalent bond
Atoms share pair of electrons
49
Ionic bond
Elections are transferred
50
Valence electron
Determines the atoms properties
51
Where is the atomic number located on and table square?
Top
52
Location of atomic mass of table square
Very bottom
53
Lewis dot structure
Dots around the EXAMPLE: H and dots around it
54
Law of conservation of mass
Mass cannot be created nor destroyed in a chemical of physical change.
55
Reactants
Start of a reaction
56
Products
Ending part of a reaction
57
Chemical reaction
One or more substances creates another substance
58
Chemical formula
Chemical numbers and symbols to represent a substance
59
Exothermic reaction
Heat is RELEASED EXITS
60
Endothermic reaction
Requires heat Heat enters
61
Coefficient
Big number before the element
62
Subscript
Small number after element Looks like a power

7 and 8 1st Sem Exams (14 decks)

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