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science chap 18

formation of the solar system

The hubble space telescope is carried back and forth into space on each space shuttle mission. A. ture B. false false
What did ancient cultures base their calandars on? The seasonal cycles of celestial objects
The time required for the moon to orbit once around the sun month
the time required for earth to orbit once around the sun year
the time required for earth for earth to rotate once on its axis day
a system for organizing time calendar
The ancient Egyptian calendar contained one 5-day month true
Which ancient calendars were linked to the sun? A. Mayan C. Roman B. Julian D. Hebrew Mayan, Egyptian, Hebrew
Why did Julius Caesar add 90 days to the year 45 B.C.? There is an extra day every 4 years.
Leap year are necessary because all months do not have the same number of days. A. True B. False false
Most countries use the calendar. A Gregorian C. Roman B. Julian D. American Gregorian
Invented algebra and our modern number system the ancient Arabs
The earliest recored of astronomical observations nabta
made an accurate calendar based on skilled forcasting the babylonians
could predict eclipses the ancient chinese
used logic and geometry to explain eclipses and the phases of the moon the ancient greeks
some stones in circles are aligned with the sunrise durnig the solstices stonehenge
many buildings are aligned with celestial bodies during certain astronomical events the maya
produced the worlds oldest existing portable star map the ancient chinese
While Europe was in the dark ages, the arab culture continued to develop astronomy. A. True B. False true
How did the earliest astronomers learn what they knew about the universe? by learning and anolizing
How long did Ptolemy's Earth-centered theory remain the popular theory for the structure of the universe? A. 100 years C. 1,500 years B. 500 years D. 5,000 years 1,500 years
Copernicus thought that the planets orbit and was the center of the universe. (Earth or the sun, Earth or the sun) The sun, the sun
Explained that planets and moons stay in orbit due to gravity Sit Isaac Newton
Stated that planets move in elliptical orbits around the sun Johannes Kepler
used a mural quadrant to measure the positions of the planets and stars. Tycho Brahe
was the first person to use a telescope to observe celestial bodies Galileo
discovered sunspots Galileo
Which planet did William Herschel discover in 1781? A. Uranus C. Mars B. Jupiter D. Pluto Uranus
Which invention in the 1800s allowed astronomers to improve their observations of the sky? A. the telescope C. The telegraph B. photography D. filters photography
Edwin Hubble discovered that the "fuzzy patches" observed by William Heschel were really other . galaxies
How did ancient cultures name the stars in the sky? Where the stars were pasitioned
If people in ancient cultures could see our moden sky, they would see the same patterns of stars that we do. A. Ture B.false true
What are constellations? Sections of the sky that contain recognizable star patterns
The ancient greeks contellation was the same as the Japanese contellation of the drum. orion
the sky is divided into a total of constellations by modern astronomers. 88
Why do astronomers around the world use the same names for the constellations? To make communication easier
The constellations that are visable in the sky are different in the spring and the fall. A.true B.false true
Imaginary point directly over the head of the observer zenith
position of a star in degrees north or south of the celestial equator declination
imagary extension of earth's equator into space celestial equator
angle between an object and the horizen altitude
always 90 degrees from the zenith altitude
where the sun appears on the first day of spring vernal equinox
measure of how far east an object is from where the sun appears on the vernal equinox fight ascension
line where the sky and earth appear to meet horizon
Some stars located near earths poles can be seen year-round, at all times of night. What are these cstars called? Circumpolar stars
Copernicus reasoned that the stars must be very far from planets because thier relative postions shift. A. true B. false false
Look at the Physics connection. What does red shift tell us about other galaxies? The universe must be expanding/ moving away.
A light-year is equal to the distance that light travels though space in year(s). one
One light-year is about 9.46 trillion . kilometers
What does figure 17 show you about the star in a constellation? A. they are spaced apart evenly B. They are fairly close together C.They are equal distance from earth D. They are very far away from each other They are very far away from each other
most stars are smaller than earth A.true B. false false
At what distance from earth would our entire solar system be visable from space? A. 100km C.150 light-years B.1,000,000 km D. 10 light-years 150 light-years
The universe looks at a distance of 10 million light-years. crowded
What do telescopes so with electromagnetic radiation? The teloscope collects it and concentrate it
The simple telescope contains two lenses-an objective lens and a lens located in the of the tesescope. eyepiece
As many as stars are visible in the sky without a telescope. 6,000
Created by: ENTG