Astr 1101 Rob Parks HW #1
Rank the following in order of increasing size.
1. Earth 2. Sun 3. Solar System 4. Milky Way 5. Local Group 6. Virgo Supercluster 7. Universe
The process of making predictions and testing scientific models never ends, as there is always the possibility that some future experiment or observation will show that a previously well-accepted model doesn't actually work under all circumstances. However, if a hypothesis is backed up by a very large body of evidence and has never failed a test, it may be elevated to the status of a theory. According to the scientific method, choose all of the following statements that are correct.
A theory has a higher probability of accurately modeling a natural phenomenon than a hypothesis does. AND All theories have enough supporting evidence behind them that we can move forward under the assumption that they are correct unless some future test proves that this is not the case.
The bright, colorful "stripes" of a rainbow such as the one shown here follow a particular order. Rank each color of the rainbow by how much energy is carried by its electromagnetic waves, from highest to lowest. (most energy to least)
Blue, yellow, orange and red.
The following are all potential explanations for the motion of sailing rocks, but not all of them are scientific hypotheses given the rules listed above. Which ones are not scientific hypotheses?
Ghost, God and magic.
Study the figure, which shows how someone on Earth can view Jupiter's moon's eclipses when Earth is closer to or farther from Jupiter, and determine which of the following are correct.
If light has infinite speed, an eclipse would be seen to happen at the same time regardless of how far away Earth is from Jupiter. AND If light has finite speed, it would take longer for it to travel from Jupiter to Earth when Earth is farther from Jupiter.
Drag each label denoting length of time it takes light to travel from one location to another to the correct target.
Moon to Earth: 1.2 sec Earth to Sun: 8.5 min Sun to the edge of the solar system (Pluto): EMPTY Pluto to nearest star: 4.3 years Across the length of the Milky Way galaxy: 100,000
Place the following two types of radiation in the appropriate place on the electromagnetic spectrum.
Refer to pic. Some will be empty.
Why don't we see cars as bluer when they approach and redder when they recede?
They are too slow.
When you turn on a lightbulb in a room, the entire room appears to flood with light at the same time. Your eyes cannot perceive light originating at the bulb and then moving outward from it. This either means that light has infinite speed (appears everywhere instantaneously), or it moves so fast that it is difficult to tell the difference. How might you improve your chances of detecting the motion of light if it moves at finite speed?
move farther away from the light source
The cosmological principle states that
on a large scale, the universe is the same everywhere at a given time.
