lessonID
stringlengths 6
6
| lessonName
stringlengths 3
52
| ID
stringlengths 6
21
| content
stringlengths 10
6.57k
| media_type
stringclasses 2
values | path
stringlengths 28
76
⌀ |
|---|---|---|---|---|---|
L_0264 | petroleum power | T_1546 | FIGURE 1.3 | image | textbook_images/petroleum_power_21023.png |
L_0264 | petroleum power | T_1546 | FIGURE 1.4 | image | textbook_images/petroleum_power_21024.png |
L_0265 | planet orbits in the solar system | T_1547 | FIGURE 1.1 | image | textbook_images/planet_orbits_in_the_solar_system_21026.png |
L_0268 | ponds and lakes | T_1553 | FIGURE 1.1 | image | textbook_images/ponds_and_lakes_21029.png |
L_0268 | ponds and lakes | T_1553 | FIGURE 1.2 | image | textbook_images/ponds_and_lakes_21030.png |
L_0268 | ponds and lakes | T_1553 | FIGURE 1.3 The Badwater Basin in Death Valley con- tains water in wet years. The lake basin is a remnant from when the region was much wetter just after the Ice Ages. | image | textbook_images/ponds_and_lakes_21031.png |
L_0269 | population size | T_1556 | FIGURE 1.1 In a desert such as this, what is the limiting factor on plant populations? What would make the population increase? What would make the population de- crease? | image | textbook_images/population_size_21032.png |
L_0269 | population size | T_1556 | FIGURE 1.2 | image | textbook_images/population_size_21033.png |
L_0270 | precambrian continents | T_1558 | FIGURE 1.1 | image | textbook_images/precambrian_continents_21034.png |
L_0270 | precambrian continents | T_1559 | FIGURE 1.2 | image | textbook_images/precambrian_continents_21035.png |
L_0270 | precambrian continents | T_1560 | FIGURE 1.3 The Precambrian craton is exposed in the Grand Canyon where the Colorado River has cut through the younger sedimentary rocks. | image | textbook_images/precambrian_continents_21036.png |
L_0271 | precambrian plate tectonics | T_1562 | FIGURE 1.1 Rodinia as it came together about 1.1 billion years ago. | image | textbook_images/precambrian_plate_tectonics_21037.png |
L_0277 | preventing hazardous waste problems | T_1581 | FIGURE 1.1 Click image to the left or use the URL below. URL: https://www.ck12.org/flx/render/embeddedobject/186861 | image | textbook_images/preventing_hazardous_waste_problems_21048.png |
L_0278 | principle of horizontality | T_1583 | FIGURE 1.1 | image | textbook_images/principle_of_horizontality_21049.png |
L_0279 | principle of uniformitarianism | T_1585 | FIGURE 1.1 | image | textbook_images/principle_of_uniformitarianism_21050.png |
L_0279 | principle of uniformitarianism | T_1586 | FIGURE 1.2 The Mesquite sand dune in Death Valley National Park, California. This doesnt look exactly like the outcrop of Navajo sandstone, but if you could cut a cross-section into the face of the dune it would look very similar. | image | textbook_images/principle_of_uniformitarianism_21051.png |
L_0280 | principles of relative dating | T_1588 | FIGURE 1.1 | image | textbook_images/principles_of_relative_dating_21052.png |
L_0280 | principles of relative dating | T_1589 | FIGURE 1.2 | image | textbook_images/principles_of_relative_dating_21053.png |
L_0281 | processes of the water cycle | T_1593 | FIGURE 1.1 Because it is a cycle, the water cycle has no beginning and no end. | image | textbook_images/processes_of_the_water_cycle_21055.png |
L_0281 | processes of the water cycle | T_1596 | FIGURE 1.2 | image | textbook_images/processes_of_the_water_cycle_21056.png |
L_0281 | processes of the water cycle | T_1599 | FIGURE 1.3 | image | textbook_images/processes_of_the_water_cycle_21057.png |
L_0281 | processes of the water cycle | T_1599 | FIGURE 1.4 | image | textbook_images/processes_of_the_water_cycle_21058.png |
L_0282 | protecting water from pollution | T_1601 | FIGURE 1.1 | image | textbook_images/protecting_water_from_pollution_21059.png |
L_0283 | radioactive decay as a measure of age | T_1605 | FIGURE 1.1 A parent emits an alpha particle to create a daughter. | image | textbook_images/radioactive_decay_as_a_measure_of_age_21060.png |
L_0283 | radioactive decay as a measure of age | T_1606 | FIGURE 1.2 | image | textbook_images/radioactive_decay_as_a_measure_of_age_21061.png |
L_0283 | radioactive decay as a measure of age | DD_0084 | The following diagram provides an example of Alpha Decay, where a Radium atom transforms or decays into a radon atom. Alpha decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle (helium nucleus) and thereby transforms or 'decays' into an atom with a mass number that is reduced by four and an atomic number that is reduced by two. Alpha decay only occurs in very heavy elements such as uranium, thorium and radium. The nuclei of these atoms are very äóìneutron richó (i.e. have a lot more neutrons in their nucleus than they do protons) which makes emission of the alpha particle possible. After an atom ejects an alpha particle, a new parent atom is formed which has two less neutrons and two less protons. Thus, when Radium-226 decays by alpha emission, Radon-222 is created. | image | teaching_images/radioactive_decay_8173.png |
L_0283 | radioactive decay as a measure of age | DD_0085 | Gamma decay is the process by which the nucleus of an atom emits a high energy photon, that is, extremely short-wavelength electromagnetic radiation. It is one of three major types of radioactivity (the other two being alpha decay and beta decay). Gamma decay is similar to the emission of light (usually visible light) by decay in the orbits of the electrons surrounding the nucleus. In each case the energy states, and the wavelengths of the emitted radiation, are governed by the law of quantum mechanics. But while the electron orbits have relatively low energy, the nuclear states have much higher energy. Gamma decay is a process of emission of gamma rays that accompanies other forms of radioactive decay, such as alpha and beta decay. Nuclei are not normally in excited states, so gamma radiation is typically incidental to alpha or beta decayóîthe alpha or beta decay leaves the nucleus in an excited state, and gamma decay happens soon afterwards. Gamma radiation is the most penetrating of the three kinds. Gamma ray photons can travel through several centimeters of aluminum. | image | teaching_images/radioactive_decay_7517.png |
L_0283 | radioactive decay as a measure of age | DD_0086 | The diagram below shows the beta decay of carbon 14. The carbon-14 nucleus has a neutron within it change into a proton Then we see both a beta minus particle (an electron with high kinetic energy) and an antineutrino ejected from the nucleus. Carbon 14 has two extra neutrons in its nucleus and that is a higher energy configuration and is a bit unstable, so it can release an electron and have a neutron turn into a proton - forming Nitrogen 14 instead, which is more stable. | image | teaching_images/radioactive_decay_8168.png |
L_0284 | radiometric dating | T_1608 | FIGURE 1.1 | image | textbook_images/radiometric_dating_21062.png |
L_0284 | radiometric dating | T_1610 | FIGURE 1.2 Zircon crystal. | image | textbook_images/radiometric_dating_21063.png |
L_0285 | reducing air pollution | T_1614 | FIGURE 1.1 | image | textbook_images/reducing_air_pollution_21064.png |
L_0285 | reducing air pollution | T_1615 | FIGURE 1.2 | image | textbook_images/reducing_air_pollution_21065.png |
L_0285 | reducing air pollution | T_1615 | FIGURE 1.3 | image | textbook_images/reducing_air_pollution_21066.png |
L_0286 | reducing ozone destruction | T_1619 | FIGURE 1.1 | image | textbook_images/reducing_ozone_destruction_21067.png |
L_0287 | revolutions of earth | T_1621 | FIGURE 1.1 According to Ptolemy, a planet moves on a small circle (epicycle) that in turn moves on a larger circle (deferent) around Earth. | image | textbook_images/revolutions_of_earth_21068.png |
L_0287 | revolutions of earth | T_1622 | FIGURE 1.2 | image | textbook_images/revolutions_of_earth_21069.png |
L_0287 | revolutions of earth | T_1622 | FIGURE 1.3 | image | textbook_images/revolutions_of_earth_21070.png |
L_0287 | revolutions of earth | T_1623 | FIGURE 1.4 | image | textbook_images/revolutions_of_earth_21071.png |
L_0287 | revolutions of earth | DD_0087 | The diagram shows different imaginary lines around the earth. At the very north is the north pole and at the very south is the south pole of the earth. An imaginary line around the earth near the north pole is the arctic circle. It is located at 66.5 Á north of equator. An imaginary line around the earth near the south pole is the Antarctic circle. It is located at 66.5 Á south of equator. Equator is an imaginary line that goes round the Earth and divides it into two halves. The northern half is called northern hemisphere and the southern half is called southern hemisphere. Tropic of cancer and tropic of Capricorn are the two imaginary lines around the Earth on either side of the equator. The Tropic of Cancer is 23Á 26äó» north of it and the Tropic of Capricorn is 23Á 26äó» south of it. | image | teaching_images/earth_poles_8061.png |
L_0287 | revolutions of earth | DD_0088 | This Diagram shows the Earth's rotation. Which is the amount of time that it takes to rotate once on its axis. This is, apparently, accomplished once a day äóñ every 24 hours. However, there are actually two different kinds of rotation that need to be considered here. For one, thereó»s the amount of time it take for the Earth to turn once on its axis so that it returns to the same orientation compared to the rest of the Universe. Then thereó»s how long it takes for the Earth to turn so that the Sun returns to the same spot in the sky. Earth's rotation is slowing slightly with time; thus, a day was shorter in the past. This is due to the tidal effects the Moon has on Earth's rotation. Atomic clocks show that a modern-day is longer by about 1.7 milliseconds than a century ago, slowly increasing the rate at which UTC is adjusted by leap seconds. | image | teaching_images/earth_poles_163.png |
L_0288 | rocks | T_1624 | FIGURE 1.1 | image | textbook_images/rocks_21072.png |
L_0288 | rocks | T_1624 | FIGURE 1.2 | image | textbook_images/rocks_21073.png |
L_0288 | rocks | T_1624 | FIGURE 1.3 Rock samples. Sample Sample 1 Minerals plagioclase, quartz, hornblende, pyrox- ene plagioclase, hornblende, pyroxene Texture Crystals, visible to naked eye Formation Magma cooled slowly Rock type Diorite | image | textbook_images/rocks_21074.png |
L_0289 | rocks and processes of the rock cycle | T_1626 | FIGURE 1.1 | image | textbook_images/rocks_and_processes_of_the_rock_cycle_21075.png |
L_0291 | rotation of earth | T_1635 | FIGURE 1.1 Foucaults Pendulum is at the Pantheon in Paris, France. | image | textbook_images/rotation_of_earth_21079.png |
L_0291 | rotation of earth | DD_0089 | The diagram shows the rotation of the Earth on its axis and how the Sun illuminates its surface. It helps us understand how day and night work. One rotation takes 24 hours, exactly the length of a day. Dividing the Earth into two parts along the Greenwich meridian, the part facing the Sun is illuminated by the daylight, whereas the other part is in the dark. By rotating, the part of the Earth in the dark ends up receiving the daylight and vice versa. When we say the Sun rises in the east it means that the east is facing the Sun. In the same way the west, which is the part in the dark, is where the Sun sets and the Moon and the stars appear. The changing of day and night is the result of the Earth rotating. | image | teaching_images/earth_day_night_86.png |
L_0291 | rotation of earth | DD_0090 | This diagram shows the earth rotating around its axis and the sun's rays hitting the earth. The side of the earth facing the sun has daylight. The side of the earth facing away from the sun is dark and has night. The earth rotates around its axis, once every 24 hours. Hence every part of the earth experiences day and night every 24 hours. There are 5 major circles of latitude that mark the diagram of the earth. There are the Arctic Circle, Tropic of Cancer, Equator, Tropic of Capricorn and the Antarctic Circle. The arctic circle is the northern most circle and the Antarctic circle is the southern most circle. The equator is the latitude in the middle that divides the earth into the northern and southern hemispheres. The tropic of cancer lies between the Arctic circle and the equator. The tropic of capricorn lies between the Antarctic circle and the equator. | image | teaching_images/earth_day_night_2744.png |
L_0292 | safety of water | T_1640 | FIGURE 1.1 Dracunculiasis, commonly known as Guinea Worm, is contracted when a per- son drinks the guinea worm larvae. | image | textbook_images/safety_of_water_21080.png |
L_0293 | satellites shuttles and space stations | T_1641 | FIGURE 1.1 The space shuttle Atlantis being launched into orbit by a rocket on Cape Canaveral, Florida. | image | textbook_images/satellites_shuttles_and_space_stations_21081.png |
L_0293 | satellites shuttles and space stations | T_1644 | FIGURE 1.2 | image | textbook_images/satellites_shuttles_and_space_stations_21082.png |
L_0293 | satellites shuttles and space stations | T_1644 | FIGURE 1.3 | image | textbook_images/satellites_shuttles_and_space_stations_21083.png |
L_0293 | satellites shuttles and space stations | T_1644 | FIGURE 1.4 | image | textbook_images/satellites_shuttles_and_space_stations_21084.png |
L_0293 | satellites shuttles and space stations | T_1644 | FIGURE 1.5 The space shuttle orbiter Atlantis touches down at the Kennedy Space Center in Florida. | image | textbook_images/satellites_shuttles_and_space_stations_21085.png |
L_0294 | saturn | T_1645 | FIGURE 1.1 | image | textbook_images/saturn_21086.png |
L_0294 | saturn | T_1647 | FIGURE 1.2 | image | textbook_images/saturn_21087.png |
L_0294 | saturn | T_1647 | FIGURE 1.3 primitive life may exist on Titan, the extreme cold and lack of carbon dioxide make it unlikely (Figure 1.4). | image | textbook_images/saturn_21088.png |
L_0294 | saturn | T_1647 | FIGURE 1.4 | image | textbook_images/saturn_21089.png |
L_0300 | seafloor spreading hypothesis | T_1667 | FIGURE 1.1 Magma at the mid-ocean ridge creates new seafloor. Since new oceanic crust is created at the mid-ocean ridges, either Earth is getting bigger (which it is not) or oceanic crust must be destroyed somewhere. Since the oldest oceanic crust was found at the edges of the trenches, Hess hypothesized that the seafloor subducts into Earths interior at the trenches to be recycled in the mantle. | image | textbook_images/seafloor_spreading_hypothesis_21094.png |
L_0301 | seasons | T_1670 | FIGURE 1.1 The Earths tilt on its axis leads to one hemisphere facing the Sun more than the other hemisphere and gives rise to sea- sons. | image | textbook_images/seasons_21095.png |
L_0301 | seasons | T_1673 | FIGURE 1.2 | image | textbook_images/seasons_21096.png |
L_0301 | seasons | DD_0091 | the diagram below shows the earth's seasons. During part of the year, Earth is closer to the sun than at other times. However, in the Northern Hemisphere, we are having winter when Earth is closest to the sun and summer when it is farthest away! Compared with how far away the sun is, this change in Earth's distance throughout the year does not make much difference to our weather's Earth orbits the sun, its tilted axis always points in the same direction. So, throughout the year, different parts of Earth get the sunó»s direct rays. | image | teaching_images/seasons_6279.png |
L_0301 | seasons | DD_0092 | The earth revolves around the sun. Its takes one year to make one full revolution. This diagram shows different configurations of the earth and the sun over the course of one year that lead to the four prominent seasons: spring, summer, fall and winter. Since the earth is inclined at an angle of 23.5 degrees, at certain times of the year, the northern hemisphere gets longer days and shorter nights, which causes the season of summer. At the same time the southern hemisphere gets shorter days and longer nights, which leads to winter. June 21 is the longest day of the year in the Northern hemisphere, and is known as the Summer Solstice in the Northern Hemisphere. December 22 is the shortest day of the year in the Northern Hemisphere and is known as the Winter Solstice in the Northern Hemisphere. | image | teaching_images/seasons_6281.png |
L_0301 | seasons | DD_0093 | The diagram below shows the earth's seasons. During part of the year, Earth is closer to the sun than at other times. However, in the Northern Hemisphere, we are having winter when Earth is closest to the sun and summer when it is farthest away! Compared with how far away the sun is, this change in Earth's distance throughout the year does not make much difference to our weather. Earth's axis is an imaginary pole going right through the center of Earth from "top" to "bottom." Earth spins around this pole, making one complete turn each day. That is why we have day and night, and why every part of Earth's surface gets some of each. | image | teaching_images/seasons_647.png |
L_0301 | seasons | DD_0094 | The diagram shows the earth's equinox phenomenon. An equinox is an astronomical event in which the plane of Earth's equator passes through the center of the Sun which occurs twice each year during spring and autumn as shown below. On an equinox, day and night are of "approximately" equal duration all over the planet. The equinoxes, along with solstices, are directly related to the seasons of the year. In the northern hemisphere, the vernal equinox (March) conventionally marks the beginning of spring and is considered the New Year in the Persian calendar or Iranian calendars as Nouroz (means new day). On the other hand, the autumnal equinox (September) marks the beginning of autumn. In the southern hemisphere, the vernal equinox occurs in September and the autumnal equinox in March. | image | teaching_images/seasons_672.png |
L_0302 | seawater chemistry | T_1675 | FIGURE 1.1 | image | textbook_images/seawater_chemistry_21099.png |
L_0302 | seawater chemistry | T_1675 | FIGURE 1.2 | image | textbook_images/seawater_chemistry_21100.png |
L_0303 | sedimentary rock classification | T_1677 | FIGURE 1.1 | image | textbook_images/sedimentary_rock_classification_21101.png |
L_0303 | sedimentary rock classification | T_1677 | FIGURE 1.2 Fossils in a biochemical rock, limestone, in the Carmel Formation in Utah. Picture Rock Name Conglomerate Type of Sedimentary Rock Clastic (fragments of non-organic sediments) Picture Rock Name Rock Gypsum Type of Sedimentary Rock Chemical precipitate | image | textbook_images/sedimentary_rock_classification_21102.png |
L_0304 | sedimentary rocks | T_1678 | FIGURE 1.1 | image | textbook_images/sedimentary_rocks_21103.png |
L_0304 | sedimentary rocks | T_1678 | FIGURE 1.2 A river dumps sediments along its bed and on its banks. | image | textbook_images/sedimentary_rocks_21104.png |
L_0305 | seismic waves | T_1679 | FIGURE 1.1 The crest, trough, and amplitude are illus- trated in this diagram. | image | textbook_images/seismic_waves_21105.png |
L_0305 | seismic waves | T_1681 | FIGURE 1.2 unsqueezing Earth materials as they travel. This produces a change in volume for the material. P-waves bend slightly when they travel from one layer into another. Seismic waves move faster through denser or more rigid material. As P-waves encounter the liquid outer core, which is less rigid than the mantle, they slow down. This makes the P-waves arrive later and further away than would be expected. The result is a P-wave shadow zone. No P-waves are picked up at seismographs 104o to 140o from the earthquakes focus. | image | textbook_images/seismic_waves_21106.png |
L_0305 | seismic waves | T_1681 | FIGURE 1.3 How P-waves travel through Earths interior. | image | textbook_images/seismic_waves_21107.png |
L_0306 | short term climate change | T_1686 | FIGURE 1.1 Under normal conditions, low pressure and warm water (shown in red) build up in the western Pacific Ocean. Notice that continents are shown in brown in the image. North and South America are on the right in this image. | image | textbook_images/short_term_climate_change_21109.png |
L_0306 | short term climate change | T_1686 | FIGURE 1.2 In El Nio conditions, the trade winds weaken or reverse directions. Warm wa- ter moves eastward across the Pacific Ocean and piles up against South Amer- ica. | image | textbook_images/short_term_climate_change_21110.png |
L_0306 | short term climate change | T_1687 | FIGURE 1.3 A La Nia year is like a normal year but the circulation patterns are more extreme. | image | textbook_images/short_term_climate_change_21111.png |
L_0311 | solar energy on earth | T_1710 | FIGURE 1.1 | image | textbook_images/solar_energy_on_earth_21126.png |
L_0311 | solar energy on earth | T_1710 | FIGURE 1.2 | image | textbook_images/solar_energy_on_earth_21127.png |
L_0312 | solar power | T_1712 | FIGURE 1.1 | image | textbook_images/solar_power_21128.png |
L_0312 | solar power | T_1712 | FIGURE 1.2 | image | textbook_images/solar_power_21129.png |
L_0312 | solar power | T_1713 | FIGURE 1.3 | image | textbook_images/solar_power_21130.png |
L_0313 | star classification | T_1714 | FIGURE 1.1 A Hertzsprung-Russell diagram shows the brightness and color of main se- quence stars. The brightness is indicated by luminosity and is higher up the y- axis. The temperature is given in degrees Kelvin and is higher on the left side of the x-axis. How does our Sun fare in terms of brightness and color compared with other stars? | image | textbook_images/star_classification_21131.png |
L_0314 | star constellations | T_1717 | FIGURE 1.1 In this image the Big Dipper is outlined and shown next to the Aurora borealis near Fairbanks, Alaska. | image | textbook_images/star_constellations_21132.png |
L_0315 | star power | T_1721 | FIGURE 1.1 A thermonuclear bomb is an uncon- trolled fusion reaction in which enormous amounts of energy are released. | image | textbook_images/star_power_21133.png |
L_0315 | star power | T_1722 | FIGURE 1.2 | image | textbook_images/star_power_21134.png |
L_0315 | star power | T_1722 | FIGURE 1.3 | image | textbook_images/star_power_21135.png |
L_0316 | states of water | T_1724 | FIGURE 1.1 A water molecule. The hydrogen atoms have a slightly positive charge, and the oxygen atom has a slightly negative charge. | image | textbook_images/states_of_water_21136.png |
L_0316 | states of water | T_1724 | FIGURE 1.2 | image | textbook_images/states_of_water_21137.png |
L_0319 | streams and rivers | T_1733 | FIGURE 1.1 | image | textbook_images/streams_and_rivers_21138.png |
L_0319 | streams and rivers | T_1733 | FIGURE 1.2 | image | textbook_images/streams_and_rivers_21139.png |
L_0319 | streams and rivers | T_1734 | FIGURE 1.3 | image | textbook_images/streams_and_rivers_21140.png |
L_0319 | streams and rivers | T_1734 | FIGURE 1.4 The East River meanders through Crested Butte, Colorado. | image | textbook_images/streams_and_rivers_21141.png |
L_0319 | streams and rivers | T_1735 | FIGURE 1.5 | image | textbook_images/streams_and_rivers_21142.png |
L_0319 | streams and rivers | T_1735 | FIGURE 1.6 | image | textbook_images/streams_and_rivers_21143.png |
L_0320 | supervolcanoes | T_1737 | FIGURE 1.1 | image | textbook_images/supervolcanoes_21144.png |
L_0320 | supervolcanoes | T_1738 | FIGURE 1.2 | image | textbook_images/supervolcanoes_21145.png |
L_0321 | surface features of the sun | T_1742 | FIGURE 1.1 | image | textbook_images/surface_features_of_the_sun_21146.png |
L_0321 | surface features of the sun | T_1742 | FIGURE 1.2 Magnetic activity leads up to a small solar flare. | image | textbook_images/surface_features_of_the_sun_21147.png |
L_0321 | surface features of the sun | T_1743 | FIGURE 1.3 A solar prominence. | image | textbook_images/surface_features_of_the_sun_21148.png |
L_0323 | sustainable development | T_1750 | FIGURE 1.1 One of the most important steps to achieving a more sustainable future is to reduce human population growth. This has been happening in recent years. Studies have shown that the birth rate decreases as women become educated, because educated women tend to have fewer, and healthier, children. | image | textbook_images/sustainable_development_21152.png |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.