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4th, 1st half exam > Science > Flashcards

Science Flashcards

1
Q

The shape of the earth is

A

oblate spheroid (geoid)

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2
Q

claimed that earth is spherical.

A

Phythagoras

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3
Q

During lunar eclipse, the shadow casted by the earth is

A

spherical

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4
Q

has 3 arguments that proving earth is spherical.

A

aristotle

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5
Q

3 arguments of aristotle

A
  1. Position of the north star
  2. Shapeofsunandmoon
  3. Disappearing ships.
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6
Q

measured the circumference of the earth

A

eratosthenes

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7
Q

Approximate circumference of the earth is

A

40,250km

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8
Q

phases of the moon

A

anaxagoras

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9
Q

arranged 850 stars according to brightness

A

hipparchus

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10
Q

Brightest stars are

A

blue

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11
Q

Dimmest star

A

red

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12
Q

coolest to hottest star

A

Red-Orange-Yellow-White-Blue

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13
Q

The daily motion of stars and other celestial bodies as a result of
earth’s rotation.

A

diurnal motion

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14
Q

The yearly motion of stars as a result of earth’s revolution.

A

annual motion

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15
Q

example of diurnal motion

A

sunset and sunrise

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16
Q

eratosthenes compared the shadow from

A

Syene and Alexandria

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17
Q

setof13constellations

A

zodiac

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18
Q

sun’s path

A

ecliptic

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19
Q

Occurs when sun passes celestial equator

A

equinoxes

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20
Q

September 22-23

A

autumnal equinox

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21
Q

March 20-21

A

vernal equinox

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22
Q

the sun passes the highest or lowest point at celestial
equator.

A

solstice

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23
Q

Summer solstice

A

jume 20-22

24
Q

winter solstice

A

dec 20-23

25
Q

lunar

A

sun-earth-moon

26
Q

solar eclipse

A

sun-moon-earth

27
Q

new moon

A

solar eclipes

28
Q

full moon

A

lunar eclipse

29
Q

ptolemic model

A

geocentric

30
Q

copernician model

A

heliocentric

31
Q

brahe model

A

geoheliocentric

32
Q

Earth is the center of the universe/solar system
 All other celestial bodies including sun revolves around it.

A

ptolemic model

33
Q

Proposed by Nicolaus Copernicus
 Sun is the center
 All other bodies including earth revolves ar

A

copernician model

34
Q

tych brahe  2 centers: (1) The earth – sun and moon revolves around it
 (2) the sun – all remaining planets revolved around it.

A

Brahe model

35
Q

changes in location of object

A

motion

36
Q

push or pull

A

force

37
Q

force that pulls object towards the center/ground

A

gravity

38
Q

changes in speed/velocity

A

acceleration

39
Q

distance traveled over period of time

A

speed

40
Q

a type of friction that occurs when air pushes an object causing it to decelerate

A

air resistance

41
Q

– resistance of medium in response to movement (resistance to motion)

A

inertia

42
Q

resistance to stopping

A

momentum

43
Q

If there is unbalanced (not constant) force, there will be unequal or not constant movement. For example

A

 A car accelerating
 Swing moving back and forth
 A can rolling down

44
Q

“every object has proper place on the universe”

A

aristorlean view in motion

45
Q

verticalmotion
 Straight up or straight down
 With the effect of gravity
 Heavier objects will fall while lighter objects will rise
 The speed/ rate of fall is dependent on the object’s size, mass,
shape etc

A

natural motion (vertical)

46
Q

 Forward/backward

            Movement as a result of push or pull (force)
A

violent motion- horizontal motion

47
Q

newton law of motion

A

1st-law of inertia
2nd- law of acceleration
3rd-law of onteraction

48
Q

A body at rest will stay at rest unless acted upon by an external
force

A

1st law of inertia

49
Q

 Acceleration is directly proportional to force
 Acceleration is inversely proportional to mass.
 F=ma

A

law of acceleration

50
Q

 For every action, there is equal and opposite reaction.

A

law of interaction

51
Q

 Resistance to stopping
 Product of mass and velocity

            Standard unit is kg m/s  Heavier objects are harder to stop than lighter ones.
A

momentum

52
Q

combination of vertical and horizontal motion.

A

projectile motion

53
Q

the object will continue in motion if unimpeded. Or unless there is force or friction that causes it to stop moving. He also introduced momentum.

A

horizontal motion

54
Q

it will not fall depending on the mass, size and shape of object. But rather, on the distance and time of fall.
 According to him, in absence of air resistance, two objects regardless of size and shape will drop at the ground the same time.
 Objects near the ground will speed up.
 In free fall, bodies will fall at constant acceleration.

A

vertical motion

55
Q

when did eratosthenes measured the circumference and what did he use

A

during 12 noon solstice using his stick

4th, 1st half exam (4 decks)

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