Time on Other Planets and Venus

Phobos and Deimos.

Jupiter and Saturn are classified as Gas Giants because they are primarily composed of hydrogen and helium.

Uranus and Neptune are referred to as Ice Giants because they contain several frozen gases.

<p>Jupiter rotates in approximately 10 hours.</p> Signup and view all the answers

<p>Io, Europa, Ganymede, and Callisto.</p> Signup and view all the answers

<p>Io is known for its numerous volcanoes due to the tidal forces from Jupiter's gravity.</p> Signup and view all the answers

<p>Ganymede is the largest moon in the solar system and is even larger than the planet Mercury.</p> Signup and view all the answers

<p>Saturn rotates almost as fast as Jupiter, taking about 11 hours for a complete rotation.</p> Signup and view all the answers

<p>Saturn's tilt of 27° allows its rings to be visible for much of the year.</p> Signup and view all the answers

<p>Titan has a thick atmosphere primarily composed of nitrogen, similar to Earth, but it also contains methane, which is not found in Earth's atmosphere.</p> Signup and view all the answers

<p>Titan has lakes, rivers, oceans, clouds, rain, seasons, wind, erosion, and volcanoes.</p> Signup and view all the answers

<p>The temperature on Titan is -180°C, which influences the composition and behavior of its lakes and weather patterns.</p> Signup and view all the answers

<p>Uranus, with its 98° tilt, experiences extreme seasonal variations, leading to poles in perpetual light for up to 42 years and then total darkness.</p> Signup and view all the answers

<p>Time on Earth is defined by days, months, and years based on its revolution and rotation, while other planets have different rotational and orbital characteristics that define their perception of time.</p> Signup and view all the answers

<p>The blue color of Uranus is attributed to the presence of methane in its atmosphere.</p> Signup and view all the answers

<p>Mercury takes about 88 Earth-days to complete a revolution and approximately 58 Earth-days to complete one rotation.</p> Signup and view all the answers

<p>Uranus was named after the Greek personification of the sky, and its moons are named primarily after characters from Shakespeare's plays.</p> Signup and view all the answers

<p>Uranus takes 84 years to orbit the sun and spins on its axis every 16-17 hours, leading to varying day lengths across its different regions.</p> Signup and view all the answers

<p>Mercury experiences extreme temperature variations, with hot temperatures reaching 430°C on the day side and cold temperatures dropping to -160°C on the night side due to its lack of atmosphere.</p> Signup and view all the answers

<p>Venus rotates extremely slowly and in a retrograde direction, meaning it spins backwards relative to its orbit around the Sun.</p> Signup and view all the answers

<p>Venus has a thick atmosphere composed of 97% CO2, which creates a strong greenhouse effect, making it the hottest planet in the solar system at about 460°C.</p> Signup and view all the answers

<p>A solar day on Mercury lasts 176 Earth-days, while its rotational period is about 58 Earth-days.</p> Signup and view all the answers

<p>Earth's rotation period is approximately 23 hours and 56 minutes, which differs from its 24-hour solar day because it progresses in its orbit while spinning.</p> Signup and view all the answers

<p>A person on Mercury could celebrate two birthdays every day due to the unique relationship between Mercury's solar day and its revolution period.</p> Signup and view all the answers

<p>The reddish-gray color is caused by sunlight filtering and bending through Earth's atmosphere.</p> Signup and view all the answers

<p>Lunar eclipses happen on average twice a year.</p> Signup and view all the answers

<p>William Gilbert documented Earth's magnetic nature in 1600.</p> Signup and view all the answers

<p>Compasses detect magnetic field lines, not the magnetic poles themselves.</p> Signup and view all the answers

<p>The magnetosphere is Earth's magnetic field that extends into space, offering protection from solar wind.</p> Signup and view all the answers

<p>The solar wind interacts with nitrogen and oxygen to create aurorae.</p> Signup and view all the answers

<p>Venus, Mars, and all dwarf planets and moons, except Ganymede, lack a magnetosphere.</p> Signup and view all the answers

<p>Planets initially consist of liquid rock and metal when they form.</p> Signup and view all the answers

<p>Earth's core is primarily made of iron and nickel, which sink because they are heavier metals compared to lighter rocks that rise to the surface.</p> Signup and view all the answers

<p>The swirling motion of liquid iron and nickel in the outer core creates convection currents, which generate Earth's magnetic field.</p> Signup and view all the answers

<p>A geomagnetic reversal is when Earth's magnetic poles switch places, and it occurs approximately every 700,000 years.</p> Signup and view all the answers

<p>Evidence for geomagnetic reversals is found at the Mid-Atlantic Ridge, indicating periodic changes in Earth's magnetic field over time.</p> Signup and view all the answers

<p>The thinning of Mars' atmosphere and loss of most of its water likely resulted from the cessation of its magnetosphere.</p> Signup and view all the answers

<p>The magnetic north pole is referred to as such because it is currently positioned in the northern hemisphere, but it represents the South Pole of Earth's magnetic field.</p> Signup and view all the answers

<p>The Atlantic Ocean is spreading at a rate of approximately 2.5 cm per year due to tectonic plate movement caused by magma pushing from the mantle.</p> Signup and view all the answers

<p>The volcanic rock aligns with Earth's magnetic field at the time it solidifies, showing alternating bands of normal and reversed polarity indicating past geomagnetic reversals.</p> Signup and view all the answers