23.2

Question 1

constellation

Answer 1

group of stars that form a pattern in the sky

Question 2

how many constellations are there

Answer 2

88

Question 3

circumpolar constellation

Answer 3

a constellation that is always visible in the sky all year round

Question 4

why cant you see some constellations all year round

Answer 4

earths changing position and orbit

Question 5

what did ancient people use constellations for

Answer 5

planting, harvest and ritual celebrations

Question 6

open cluster

Answer 6

loosely shapes groups of hundreds of stars

Question 7

globular clusters

Answer 7

spherically shaped group of hundreds of stars

Question 8

binary stars

Answer 8

1 of 2 stars that are bound together by gravity and orbit a common center of mass
usually appear close to each other
often appear as one star to the naked eye

Question 9

doppler effect

Answer 9

an observed change in the frequency of a wave when the source or observer is moving

Question 10

blue shift

Answer 10

the colors in the spectrum of a star moving toward the earth are shifted towards blue

Question 11

light year

Answer 11

distance light travels in 1 year

Question 12

how fast does light travel

Answer 12

300,000km per sec

Question 13

parsec

Answer 13

unit of distance equal to 3.26 light years

Question 14

parallax

Answer 14

apparent shift in the position of an object when viewed from different locations

Question 15

apparent magnitude

Answer 15

the brightness of a star as seen from earth when compared to a magnitude scale

Question 16

the ________ number a star has on the magnitude scale the __________ the star is

Answer 16

lower, brighter

Question 17

the ________ number a star has on the magnitude scale the __________ the star is

Answer 17

higher, dimmer

Question 18

absolute magnitude

Answer 18

the brightness that a star would have at a distance 10 parsecs from earth

Question 19

luminosity

Answer 19

energy output from the surface of a star per sec

Question 20

what is luminosity measured in

Answer 20

watts

Question 21

what stars are the hottest

Answer 21

blue

Question 22

what stars are the coolest

Answer 22

red

Question 23

blue stars

Answer 23

largest stars, 1000x the sun

Question 24

red stars

Answer 24

smallest stars, size of earth

Question 25

hr diagram

Answer 25

graph showing the relationship of the surface temp and the absolute magnitude of a star

Question 26

what types of stars are shown on the hr diagram

Answer 26

main sequence stars, giants, super giants, dwarfs

Question 27

main sequence stars

Answer 27

the location on the hr diagram where most of the stars lie, had a diagonal pattern from from the lower right to upper left

Question 28

giants

Answer 28

very large cool bright star
located at the top middle of the diagram

Question 29

super giants

Answer 29

giant star
located at the top right of the diagram

Question 30

dwarfs

Answer 30

small hot dim star located at the bottom left on the digram