Comprehensive Earth and Space Science Study Guide
Energy in Earth's Atmosphere
Energy Transfer Process: The process through which gases, such as water vapor, hold energy in the atmosphere and keep Earth warm is known as the greenhouse effect.
Sunlight Absorption: When land absorbs sunlight, some of that energy is directly transferred to the air by electromagnetic waves in the form of infrared waves.
Travel of Solar Energy: The sun's energy travels to Earth in the form of electromagnetic waves.
Atmospheric Layers: Earth's atmosphere is categorized into different layers based on changes in temperature.
Ozone Layer Protection: The ozone layer is critical for the health of organisms because it prevents too much ultraviolet (UV) radiation from reaching Earth's surface.
Energy Transformation in Plants: A tiny fraction of the visible light reaching Earth's surface is transformed into chemical energy within plants and other photosynthetic organisms.
Composition of Incoming Radiation: Most electromagnetic waves from the sun that reach Earth are in the form of visible light, which can be seen by the human eye.
Temperature Conversion: To convert to degrees Fahrenheit:
Methods of Heat Transfer:
Convection: The transfer of heat by the movement of a fluid (liquid or gas).
Radiation: The transfer of energy by electromagnetic waves.
Conduction: The transfer of heat between two substances that are in direct contact.
Patterns of Circulation in the Atmosphere
Global Wind Models: Models of global winds affecting North America should include polar easterlies.
Sea Breeze Development: A sea breeze develops due to the unequal condition of warmer air over land than over water. This temperature difference causes air to move from the water toward the land.
Winter Temperature Shifts: The polar jet stream is the global wind pattern that can wander farther south than usual during winter, causing temperatures in the United States to decrease.
The Coriolis Effect: Because of the Coriolis effect, global winds in the Southern Hemisphere turn to the left. This effect is caused by the rotation of the Earth.
Global Wind Pattern Formation: Unequal heating of Earth's surface causes warm air to rise at the equator and cold air to sink at the poles, creating air movement. The Earth's rotation then bends this moving air to form global wind patterns.
Wind Measurement: Wind speed and pressure are measured using an anemometer.
Major Global Wind Belts: The primary belts include the trade winds, prevailing westerlies, and polar easterlies.
Definitions of Wind Phenomena:
Wind: The movement of air parallel to Earth’s surface.
Sea Breeze: A local wind that blows from an ocean or lake.
Land Breeze: The flow of air from land toward a body of water.
Jet Streams: Bands of high-speed winds approximately above Earth's surface.
Model: A diagram or map used to describe and predict wind patterns and their effects.
Patterns of Circulation in the Ocean
Curved Current Paths: Ocean currents move in a curved path primarily due to Earth's rotation (the Coriolis effect).
Deep Ocean Currents: These currents flow due to density differences in the water, which are often caused by variations in temperature and salinity. They slowly carry cold water from the poles toward the equator.
Surface Currents: These are caused mainly by winds blowing across the surface of the ocean.
El Niño: This climate event can bring heavy rains and flooding to California and result in an especially warm winter in the northeastern United States.
The Gulf Stream: This current has a warming effect on the climates of nearby land masses.
Global Conveyor System: The role of the global conveyor system is to move heat and nutrients around Earth through ocean currents, which helps regulate global climate and weather patterns.
Movement in Space
Apparent Planetary Motion: Planets appear to move in the sky against the backdrop of the stars.
Geocentric Model: In the geocentric model, Earth is positioned at the center of the universe.
Heliocentric Model Support: Galileo Galilei’s discovery of the phases of Venus provided significant evidence supporting the heliocentric (sun-centered) model.
Causes of Apparent Motion: Objects in the sky appear to move due to Earth's rotation (spinning on its axis) and revolution (orbiting the sun).
East-to-West Star Motion: Stars appear to move from east to west in the night sky because Earth rotates on its axis from west to east.
Constellation Visibility: A constellation like Hercules may be visible in September but not in March because Earth is on different sides of the Sun at those times; in March, Hercules is located behind the Sun from Earth's perspective.
Earth's Movements in Space
Earth's Axis: The imaginary line that runs through Earth's poles is called its axis.
Day and Night Cycles: The cyclic pattern of day and night is caused by the rotation of Earth on its axis.
Seasons: Earth has seasons because its axis is tilted as it revolves around the sun.
Equinoxes: The two times of the year when the sun is directly overhead at the equator are the spring equinox and the autumn equinox.
Gravity:
Distance Factor: The closer two objects are to each other, the greater the force of gravity between them.
Universal Gravitation: Newton's law of universal gravitation states that every object in the universe attracts every other object.
Moon's Orbit: Without Earth's gravity, the moon would veer away from Earth in a straight line due to inertia.
Inertia: The tendency of an object to resist a change in motion.
Northern Hemisphere Summer: It is generally warmer in the Northern Hemisphere in June than in December because the Northern Hemisphere is tilted toward the Sun in June.
Phases and Eclipses
Lunar Eclipse: This occurs when the moon moves through Earth's shadow. If you were on the moon during a lunar eclipse, you would witness a solar eclipse.
Tides: A spring tide is produced when the sun, moon, and Earth line up during a new moon (or full moon).
Reason for Moon Phases: The moon has phases because as it revolves around Earth, the relative positions of the moon, Earth, and sun change, causing different portions of the sunlit side of the moon to be visible from Earth.
Solar Eclipse: A solar eclipse occurs when the moon passes between the sun and Earth, blocking all or part of the sun's light from reaching certain areas on Earth.
Solar System Objects
Inner Planets: All inner planets share the common characteristic of having a rocky surface. They formed in a warmer area of the solar system compared to the outer planets.
Gas Giants: All gas giants (outer planets) are surrounded by a system of rings composed of particles ranging from small dust to large chunks of ice.
Astronomical Unit (AU): One astronomical unit is equal to the average distance from the center of Earth to the center of the Sun, which is approximately .
Solar System Composition: The solar system consists of the sun, the planets, their moons, and various smaller objects.
Specific Celestial Bodies:
Planet: A round object that orbits the sun and has cleared its orbital path.
Moon: A natural satellite orbiting a planet.
Asteroids: Small, mostly rocky bodies found primarily in the belt between Mars and Jupiter.
Meteoroids: Chunks of rock or dust smaller than asteroids.
Comets: Loose balls of ice and rock with long, narrow orbits that develop glowing tails of dust and gas as they approach the sun.
The Sun and Learning About the Universe
The Sun: A gaseous body that is the largest object in the solar system. It produces energy in its core through the process of nuclear fusion.
Sun's Interior Layers:
Core: The innermost layer where energy is produced.
Radiative Zone: The middle layer of the interior.
Convection Zone: The outermost layer of the interior where gases rise and sink.
Sun's Atmosphere: The inner layer of the sun's atmosphere is called the photosphere.
Telescope Technology:
Function: Telescopes collect and focus different forms of electromagnetic radiation.
Optical Telescopes: The two main types are reflecting telescopes (using mirrors) and refracting telescopes (using lenses).
Usage Example: A refracting telescope can be used to make Saturn look larger, allowing its rings to be visible.
Space Technology:
Space Station: Technology that allows humans to live and work in space for long periods.
Space Shuttle: Launched first in 1981, it had the advantage over earlier capsules of being reusable (usable more than once).
Electromagnetic Spectrum:
Visible Light: The specific range of electromagnetic radiation that humans can see.
Wavelength: The distance between the crest of one wave and the crest of the next wave.