Expanding Universe
Red Shift
Spectroscopy
Space Technology
Tides & Gravity
100
True or False: The galaxies are always expanding.
False. Galaxies themselves do not expand, the space between them (universe) does.
100
What colors on the visible light spectrum has the lowest and highest frequency?
highest: Violet
Lowest: Red
100
What colors are in the visible light spectrum (ordered from lowest frequency to highest)
Red, Orange, Yellow, Green, Blue, Indigo, Violet
100
What is a satellite? Give an example of a natural satellite to Earth.
An object that orbits around another object.
The moon.
100
What non-contact force causes Earth's tides?
Gravity
200
Give an example of how we can show the universe is expanding. (We did one in class and talked about another)
Balloon or rising dough.
200
What color does a galaxy appear when it's moving away? What about when it's still close to Earth?
Red when moving away, Blue when close.
200
Why do different stars have different bands of light on the visible light spectrum?
Because they are made of different elements.
200
What helps us gather observations and collect samples from places in space we cannot travel?
A. radio telescope B. satellite C. space probe
D. spectroscope
C. Space probe
200
What type of tide will this placement of the Earth, Moon, and Sun create?
Spring Tide
300
Explain the big bang theory.
how astronomers explain the way the universe began. It is the idea that the universe began as just a single point, then expanded and stretched to grow as large as it is right now—and it is still stretching!
300
What is the doppler effect and give an example.
The increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move towards (or away from) each other.
Any example that is right.
300
What is the item called that allows us to see what the stars are made of?
Spectroscope.
300
An astronomer wanted to study celestial objects with the shortest wavelength. What kind of telescope would the astronomer need?
a. infrared
b. optical
c. radio
d. x-ray
c. Radio
300
True or False: Neap tides create the highest high tides and the lowest low tides.
False. Spring tides create the highest high tides and lowest low tides.
400
What two phenomenons tell us that the universe is expansing?
Red shift and doppler effect.
400
If a galaxy is currently red shifting, what color can we assume it might it have been 30 years ago?
Blue
400
Draw a picture on your white board of a red shifting star vs blue shifting. (make up the elements)
tbd
400
Why should you use a telescope put into space rather than on Earth?
Because our atmosphere can get in the way and you won't be able to see things as clearly.
400
What affects Gravity more? Distance or mass? Explain
Distance.
500
Gravity warps and stretches:
space or spacetime
500
The speed and general direction of motion of a galaxy relative to Earth can be determined by:
a. Measuring it's red shift
b. the gravity it exerts
c. contrasting it against nearby stars
d. observing its motion across the sky
a. measuring it's red shift.
500
How does gravity cause stars to form? What is the beginning of a star called?
Gravity causes collisions between hydrogen and helium to form.
Nebula.
500
What telescope can give you information in almost any weather or any time of day?
a. Infrared B. Optical C. Radio D. x-ray
C. Radio
500
If two objects are the same distance, what would have the most affect on their gravitational force?
Draw an example on your white board.
Mass.