Galaxies and Light Years
Light year is a measurement of _________ and not a measurement of time.
Distance
True or False: Scientist always ask a question before observing.
False
What is the name of the diagram used to classify stars?
H-R Diagram
How does a theory differ from a law?
A theory tells you why and a law explains what happens.
What is the force that pulls objects towards the center?
Gravity
Astronomical unit (AU) is the average _______ between the sun and the ________.
Distance, Earth
How many main steps are in the scientific method?
7
What are the 4 properties of stars used by scientists to classify them?
Age, temperature, color, luminosity
Give an example of a theory or a law
Answers will vary.
What does gravitational force depend on?
Mass and Distance
If a star was 5 light years away and you are 12 and you could travel to that star, how old would you be once you reach that star?
17
What are the 3 methods of science?
Experiments, Models, Investigations
Stars that are blue are ________ than the stars that are red.
Hotter
What happens to a theory when new evidence is found?
That theory is modified or revised but does not become a law.
Object 1: Mass of 23kg
Object 2: Mass of 18kg
Which object has the greater gravitational force and why?
Object 2 because it has a greater mass than object 1.
Which planet has a closer astronomical unit compared to Earth, Mars or Jupiter.
Mars
Name the two types of data scientists collect.
Qualitative and Quantitative
How is the x-axis on the H-R diagram different from how line graphs are set up in math?
The temperature increases from right to left. The closer to the origin the hotter the star.
Can a law become a theory or a theory become a law? Why or why not?
No, each serves a different purpose and are not interchangable.
What 2 forces keeps an object in their orbit?
Gravity and intertia.
How many galaxy shapes are there? Name them and describe them.
There are 3 galaxy shapes, elliptical, irregular, spiral. An elliptical galaxy is an oval shape, an irregular galaxy has no defined shape, a spiral galaxy is the galaxy that we live in.
True or False: If your results don't support your hypothesis, you can revise data to support your hypothesis.
False
How does absolute and appearant magnitude apply to the H-R diagram?
Absolute magnitude is the actual brightness of a star vs. appearant magnitude is how bright a star appears because of its distance.
What kind of evidence do scientists need to develop a theory?
Repeated experiments,data, and observations that explains why something happened.
Would your weight on Jupiter differ from your weight on Earth , why or why not?
Yes, you would weigh more on Jupiter than Earth because Jupiter has a stronger gravitational pull than Earth.