Unit 6- Astronomical Hierarchy

Which of the following best describes the hierarchical relationship between a planet and a galaxy?

• A planet is larger than a galaxy.

• A planet is part of a solar system, which is part of a galaxy.

• A galaxy is part of a planet's atmosphere.

• A planet and a galaxy are the same size.

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What is the primary reason we use light years to measure distances in space?

• To measure the brightness of stars.

• To understand the enormous distances between objects in space.

• To calculate the temperature of planets.

• To determine the size of galaxies.

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How does the number of stars in a galaxy compare to the number of galaxies in the universe?

• There are more galaxies than stars in a galaxy.

• Each galaxy contains many billions of stars, and there are many billions of galaxies in the universe.

• There are fewer stars in a galaxy than galaxies in the universe.

• The number of stars in a galaxy is equal to the number of galaxies in the universe.

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Which property of stars is directly related to their temperature?

• Apparent magnitude

• Luminosity

• Color

• Size

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What is the function of sunspots in the solar model?

• They increase the Sun's temperature.

• They are cooler areas on the Sun's surface that affect solar activity.

• They are the main source of solar flares.

• They are responsible for the Sun's rotation.

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Explain how the size of a planet affects its gravitational pull within a solar system.

• Larger planets have weaker gravitational pull.

• The size of a planet does not affect its gravitational pull.

• Larger planets have stronger gravitational pull, affecting nearby objects.

• Smaller planets have stronger gravitational pull.

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Describe how the concept of light years helps scientists understand the universe.

• It allows scientists to measure the brightness of stars.

• It helps scientists calculate the age of the universe.

• It provides a way to measure the vast distances between celestial objects.

• It is used to determine the temperature of distant planets.

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How do astronomers classify galaxies based on their structure?

• By their color and temperature.

• By the number of stars they contain.

• By their shape, such as spiral, elliptical, or irregular.

• By their distance from Earth.

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What factors determine the apparent magnitude of a star as seen from Earth?

• The star's size and distance from Earth.

• The star's temperature and color.

• The star's luminosity and distance from Earth.

• The star's age and composition.

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Create a simple model to explain the process of convection in the Sun.

• Convection involves the rotation of the Sun's core.

• Convection is the process where hot plasma rises and cool plasma sinks, creating a cycle.

• Convection is the emission of solar flares from the Sun's surface.

• Convection is the formation of sunspots on the Sun's surface.

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