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| Question | Answer |
|---|---|
| Internal Heat Sources | Accretion energy, radioactive decay, and tidal heating. |
| Magnetic Field Requirements | A rotating planet with a molten metal interior. |
| Tides | Caused by differences in gravitational pull across Earth. |
| Tidal Effects | Ocean tides, Earth's rotation slowing, Moon moving away (~3.8 cm/year). |
| Runaway Greenhouse | Extreme heating when greenhouse effect becomes uncontrollable (Venus). |
| Weak Greenhouse | Minimal warming due to thin atmosphere (Mars). |
| Atmospheric Layers | Troposphere (weather), Stratosphere, Thermosphere, Exosphere. |
| Atmospheric Pressure | Decreases with altitude. |
| Climate Influences | Distance from Sun, albedo, rotation rate, axial tilt. |
| Mars Atmospheric Loss | Lost atmosphere due to low gravity and lack of magnetic field. |
| Jovian Planet Structure | Core, metallic hydrogen (Jupiter/Saturn), molecular hydrogen, cloud layers. |
| Mass vs Radius in Gas Giants | More mass does not always mean larger size due to gravitational compression. |
| Tidal Heating | Internal heating caused by gravitational stretching from orbital resonance. |
| Io Volcanism | Internal heating caused by gravitational stretching from orbital resonance. |
| Titan | Moon of Saturn with thick atmosphere and methane lakes. |
| Triton | Neptune's moon with retrograde orbit; likely captured. |
| Planetary Rings | All four jovian planets have rings; Saturn's are largest and possibly young. |
| Asteroids | Rocky, irregular objects mainly in the asteroid belt. |
| Asteroid Belt Origin | Jupiter's gravity prevented a planet from forming there. |
| Iridium Layer | Evidence of asteroid impact that contributed to dinosaur extinction. |
| Chicxulub Crater | Impact crater linked to dinosaur extinction. |
| 10 km Asteroid Impact Frequency | Occurs every few hundred million years. |
| Conservation Laws in Solar System | Explain orderly motion and formation structure. |
| Spectroscopy Importance | Reveals composition and temperature of stars and planets. |
| Tidal Heating Importance | Drives geological activity in moons. |
| Impacts and Life | Large impacts can shape planetary surfaces and influence biological evolution. |
| How Robotic Spacecraft Work | They use solar panels or nuclear power for energy, onboard computers for navigation, and thrusters for course corrections. Instruments collect data and transmit it back to Earth using radio signals. |
| Orderly Patterns of Motion | Caused by conservation of angular momentum as the solar nebula collapsed, spun faster, and flattened into a disk. |
| Origin of Asteroids and Comets | Leftover planetesimals from solar system formation; asteroids formed in the inner regions, comets formed in the outer regions. |
| Exceptions to Solar System Rules | Caused by collisions, gravitational interactions, orbital resonances, and captured objects. |
| Solar System Compared to Exoplanets | Not fully typical; many systems have hot Jupiters and super-Earths close to their stars. |
| Planetary Magnetic Fields | Require a rotating planet with a molten metal core to generate a dynamo effect. |
| Wind and Weather | Caused by uneven solar heating creating pressure differences and atmospheric circulation. |
| Long-Term Climate Change | Driven by greenhouse gas changes, albedo shifts, axial tilt, volcanic activity, and orbital variations. |
| Atmospheric Gain and Loss | Gained from volcanic outgassing and impacts; lost through thermal escape, solar wind stripping, and weak gravity. |
| Small Icy Moons vs Small Rocky Planets | Ice melts and deforms at lower temperatures, allowing easier geological activity. |
| Origin of Jovian Rings | Formed from shattered moons or debris prevented from forming moons by tidal forces. |
| Kuiper Belt | A region of leftover icy bodies beyond Neptune that never formed into a planet. |
| Dinosaur Extinction Impact | Supported by a global iridium layer, shocked quartz, and the Chicxulub crater indicating a 10 km asteroid impact. |
| Impact Risk Today | Large extinction-level impacts are rare but smaller impacts occur more frequently. |
| Jovian Planets and Impact Rates | Jupiter can deflect or capture comets but may also redirect some toward the inner solar system. |
| Meteors vs Meteorites | A meteoroid burns in the atmosphere creating a meteor; if it reaches the ground, it becomes a meteorite. |
| Electromagnetic Spectrum | Radio, Microwave, Infrared, Visible, Ultraviolet, X-ray, Gamma ray (low to high energy). |
| Speed of Light (c) | 3 × 10⁸ meters per second. |
| Oort Cloud | A distant spherical cloud (~50,000 AU) of icy bodies; source of long-period comets. |
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