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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
Q

Melting point

A

Solid becomes a liquid

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25
Q

Freezing point

A

At which a substance has tight monetary molecules

26
Q

Condensation point

27
Q

Weight vs mass

A

Mass is not a measure of weight, it is the measure of how much something has

28
Q

Endothermic

A

Heat entering a substance

29
Q

Exothermic

A

Heat exiting

30
Q

Equation for density

A

Mass divided by

Volume equals Density

31
Q

Physical changes are…..

A

STATE changes

32
Q

Chemical changes are…..

A

Reactivity

33
Q

Atom

A

Smallest unit of life

Building blocks of life

34
Q

Nucleus

A

Center part of atom

35
Q

Proton

A

Positive charge

36
Q

Neutron

37
Q

Electron

A

Negative charge

38
Q

Electron cloud

A

Region around nucleus and holds the electrons

39
Q

Mass number

A

Sum of protons and and neutrons in nucleus

40
Q

Atomic number

A

Number of only protons in nucleus

41
Q

Ion

A

When electrons and protons are not equal

42
Q

Isotope

A

Same number of protons not NEUTRONS

43
Q

Atomic mass

A

Mass media f ate m expressed in atomic units

44
Q

Metals

A

Conducts heat and electricity WELL

45
Q

Non metals

A

Conducts heat and electricity POOR

46
Q

Period

A

Horizontal row on periodic table

47
Q

Group

A

Vertical group on periodic table

48
Q

Covalent bond

A

Atoms share pair of electrons

49
Q

Ionic bond

A

Elections are transferred

50
Q

Valence electron

A

Determines the atoms properties

51
Q

Where is the atomic number located on and table square?

52
Q

Location of atomic mass of table square

A

Very bottom

53
Q

Lewis dot structure

A

Dots around the

EXAMPLE: H and dots around it

54
Q

Law of conservation of mass

A

Mass cannot be created nor destroyed in a chemical of physical change.

55
Q

Reactants

A

Start of a reaction

56
Q

Products

A

Ending part of a reaction

57
Q

Chemical reaction

A

One or more substances creates another substance

58
Q

Chemical formula

A

Chemical numbers and symbols to represent a substance

59
Q

Exothermic reaction

A

Heat is RELEASED

EXITS

60
Q

Endothermic reaction

A

Requires heat

Heat enters

61
Q

Coefficient

A

Big number before the element

62
Q

Subscript

A

Small number after element

Looks like a power

7 and 8 1st Sem Exams (14 decks)

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