Solar System & Planets
A student lists the planets as Mercury → Venus → Mars → Earth. What correction should be made?
Earth and Mars should switch places: Mercury → Venus → Earth → Mars.
Two objects are moved farther apart without changing their masses. Predict what happens to their gravitational attraction.
It decreases.
Which sequence correctly moves from the smaller system to the larger system?
A. Galaxy → Planet → Universe → Solar System
B. Planet → Solar System → Galaxy → Universe
C. Solar System → Planet → Universe → Galaxy
D. Planet → Galaxy → Solar System → Universe
Answer: B
Scientists observe a rocky object orbiting the Sun between Mars and Jupiter. What is the best classification?
Asteroid.
Model A places Earth at the center. Model B places the Sun at the center. Identify both models.
A = geocentric; B = heliocentric.
Earth is 1 AU from the Sun and Neptune is about 30 AU away. Which planet should take longer to revolve around the Sun, and why?
Neptune because it is much farther from the Sun.
Two planets are the same distance from the Sun, but Planet A has more mass than Planet B. Which has the stronger gravitational attraction?
Planet A
A student says, “The Milky Way contains our solar system, so the Milky Way must be smaller than the solar system.” What is wrong with the student's reasoning?
The solar system is part of the Milky Way, so the Milky Way is much larger.
An object has a nucleus and coma and becomes visible when it approaches the Sun. What evidence identifies it?
Those characteristics identify it as a comet.
Why did the heliocentric model represent a major change from Ptolemy's geocentric model?
it placed the planets in orbit around the Sun rather than Earth.
Venus is similar to Earth in size and composition. Why does this NOT mean Venus can support life like Earth?
Venus has an extremely high surface temperature.
Why isn't gravity alone enough to describe the constant movement of planets around the Sun?
Planetary movement involves both gravity and inertia
The Sun is one star among billions of stars in the Milky Way. What does this tell you about Earth's place in the universe?
Earth is part of a solar system within the much larger Milky Way galaxy.
A small rocky object is traveling through space. It enters Earth's atmosphere and produces a bright streak. How does its name change?
Meteoroid → meteor.
Early heliocentric models showed circular planetary orbits. What later change made the model more accurate?
Planetary orbits were represented as ellipses rather than concentric circles.
A planet is farther from the Sun than Saturn but closer than Neptune. Which planet could it be?
Uranus.
Scientists discover a star with greater mass than the Sun in our solar system. Based on the assessment model, how could this affect planetary motion?
Its greater mass could exert a stronger gravitational pull on the planets.
Put these from closest to farthest from Earth: center of the Milky Way, Moon, Sun.
Answer: Moon → Sun → center of the Milky Way.
Part of that object survives its trip through the atmosphere and lands on Earth. What is it now called?
r: Meteorite.
Hubble observed evidence that the universe is expanding. Which scientific idea does this evidence support in the assessment?
The Big Bang theory.
Jupiter has much more mass than Earth, Mercury, or Saturn. Based only on mass, which would experience the greatest gravitational attraction with the Sun? Explain.
Jupiter because it has the greatest mass of those planets.
Student A says, “Gravity depends only on mass.” Student B says, “Gravity depends on mass AND distance.” Who is supported by the evidence? Explain.
Student B; gravitational attraction is affected by both mass and distance.
A photograph shows a galaxy with curved arms extending from its center. Based on the galaxy classifications in the assessment, which type best describes it?
Answer: Spiral galaxy.
A student says a meteor and meteorite are exactly the same thing. Use evidence to correct the student.
A meteor is the bright streak produced in the atmosphere; a meteorite is material that survives and reaches Earth's surface.
Challenge: Four cards are mixed up: Formation of galaxies | Big Bang | Formation of first stars | Cosmic dark ages. Put them in the sequence used on the assessment.
Big Bang → Cosmic Dark Ages → Formation of First Stars → Formation of Galaxies.