Questions and Answers
What is a light-year?
The distance that light travels in one year.
How fast does light travel in kilometers per second?
300,000 kilometers.
What unit of measurement is the light-year?
Distance.
What is 13.8 billion written in correct scientific notation?
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How many Earth diameters fit into the circumference of Jupiter?
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How many times the median wage was the chief executive earning when paid $23.7 million?
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What fraction of the world's population lived in the U.S. in 2019?
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Order these astronomical objects from smallest to largest:
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Order the following objects from nearest to furthest:
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Categorize the following objects into Inside the Universe or Outside the Universe:
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Label the following nebulae from youngest to oldest based on light-years:
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What are the main types of objects found beyond Earth?
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Scientific models and hypotheses can change as new experiments or observations are done.
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The first coronavirus stimulus bill was for 2.2 trillion dollars, written as 2.2 x 10^6 in scientific notation.
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By looking billions of light-years out into space, astronomers are actually seeing billions of years into the past.
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The stars we see in the night sky are other suns that look like points of light because they are far away.
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Study Notes
Distance and Light
- A light-year measures the distance light travels in one year.
- Light travels at approximately 300,000 kilometers per second, equivalent to 3 x 10^5 km/s.
Scientific Notation
- In scientific notation, 13.8 billion is expressed as 1.38 × 10^10.
- The first coronavirus stimulus bill of March 2020, valued at $2.2 trillion, is inaccurately noted as 2.2 x 10^6 in scientific notation.
Planetary Measurements
- Jupiter's circumference is 439,264 km; Earth’s equatorial diameter is 12,756 km, allowing for approximately 34.44 Earth diameters to fit into Jupiter’s circumference.
Economic Comparisons
- A fast-food CEO earning $23.7 million had a wage factor approximately 3310 times greater than the median employee wage of $7160.
Population Statistics
- The U.S. population in June 2019 was about 329 million, constituting approximately 0.04340 of the global population of 7.58 billion.
Astronomical Object Sizes
- Ordered smallest to largest: Moon, Jupiter, Sun, Galaxy.
Cosmic Distances
- Ordered nearest to furthest: Moon, Sun, Pleiades Star Cluster, Andromeda Galaxy, Coma Cluster of Galaxies.
Cosmic Locations
- Inside the Universe: M51 Galaxy, Stefan's Quintet, Earth, Centauri, Saturn.
- No objects identified as Outside the Universe.
Nebula Ages
- Ordered from youngest to oldest: Dumbbell (1200 light-years), Orion (1300), Ring (2600), Rosette (5000), Crab (6500).
Scientific Method Steps
- The process involves making an observation, forming a hypothesis, making a prediction, and then running experiments to collect data.
- A hypothesis can be supported or not supported by the results of a test.
Understanding Cosmic Structures
- The Sun is a star, planets orbit stars, galaxies consist of billions of stars, and moons orbit planets. Collectively, these form the universe.
Scientific Flexibility
- Scientific models and hypotheses are subject to change based on new experiments and improved observational technology.
Time and Space
- Observing distant celestial objects allows astronomers to view historical events, effectively looking into the past due to the time light takes to reach Earth.
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Description
Test your knowledge on various scientific concepts surrounding distance measurement, particularly light-years, and the applications of scientific notation. This quiz also delves into planetary sizes, economic comparisons, and population statistics, providing a well-rounded assessment of your understanding in these areas.
