Distance
What is a light-year?
the distance light travels in a year.
There are 3 types of galaxies. What are they called?
Spiral
Elliptical
Irregular
What is apparent magnitude (brightness)?
What is an HR Diagram used for? What does it tell us about stars?
HR Diagrams tell us about a star's brightness (luminosity) and temperature.
What method would be best in studying the Universe?
A. generating a graph to compare galaxies.
B. develop a map of every single galaxy and star.
C. Build a model of every star and galaxy known.
D. Generate a computer model of known stars and galaxies and modify it as new discoveries are made.
D. Generate a computer model of known stars and galaxies and modify it as new discoveries are made.
If it takes "days" to get to the moon and "years" to get to Neptune, how long will it take to get to Mars?
A. hours
B. days
C. months
D. years
C. months
An astronomer photographed an area of gas, dust and many stars distributed along spiral arms. What is the astronomer seeing?
A galaxy (spiral)
What affects a stars brightness and size?
Distance from Earth. A star can be massive and bright but looks tiny and dim from earth because it is far away.
Stars that are cooler are going to be ______ in color. Stars that are hotter are going to be ______ in color
Stars that are cooler are going to be red in color. Stars that are hotter are going to be blue in color.
Which of the following best explains why the Hubble Space telescope was so important to scientists?
A. It provided a new way to study Earth's atmosphere
B. It proved that we could launch a telescope into space.
C. It provided scientists with data about the Universe they had not been able to detect before.
D. Hubble collected samples of distant celestial bodies.
C. It provided scientists with data about the Universe they had not been able to detect before.
What is an astronomical unit and what objects in space would you measure?
1 AU is the distance between the Earth and Sun. We would measure the distance between planets in AU's
How many stars does a galaxy contain?
Hundreds? Thousands? Millions? Billions?
BILLIONS!
What 4 properties do we classify stars?
apparent magnitude
temperature
absolute brightness
size/mass
What are the 4 groups of stars?
White dwarf
Main Sequence
Giants
Super Giants
Which statement would be the best method to collect data on the impact solar flares have on Earth's atmosphere?
A. Use a telescope to observe the sun during a flare.
B. Measure the toxic gas levels in earths atmosphere during an eclipse
C. Develop a computer model that simulates how the sun uses hydrogen during a flare
D.Launch a satellite to measure the radiation that reaches earths atmosphere during a flare.
D.Launch a satellite to measure the radiation that reaches earths atmosphere during a flare.
Scientist can study distance in space by sending out light waves and seeing how long it takes for that signal to return. What signal would take the longest to return? A planet within our Solar System or another galaxy?
Another galaxy. Other galaxies are much farther away that objects in our solar system.
Correct the statement:
A star contains only one galaxy
A star does not contain galaxies. A galaxy contains many stars.
If the absolute brightness of a star changes, what else will change?
The stars absolute magnitude
the rate at which a star uses its energy
the rate at which a star releases its energy
List these colors from coolest to hottest.
Blue, White, Red, Yellow
Red, Yellow, White, Blue
Which statement is an example of good research and scientific knowledge?
A. Physicists prefer to build new knowledge based on their own work.
B. Physicists do not like to use knowledge from other scientists of the past.
C. Physicists build on the ideas of others to expand scientific knowledge.
D. Physicists are best when developing new ideas that will lead to individual recognition.
C. Physicists build on the ideas of others to expand scientific knowledge.
Correct this statement:
"A light-year is very small and distances in space are very small"
"A light-year is very LARGE and distances in space are very LARGE"
Which group of star has low temperatures and high luminosity?
Super Giants
How does the composition of a comet compare to the composition of the Sun?
comets are made of ice and dust whereas the sun is made up of gas.