Rocks: Earth's Autobiography Science Object
Science Object
Rocks: Earth's Autobiography
Grade Level: Elementary School, High School, Middle School
Science Objects are two hour on-line interactive inquiry-based content modules that help teachers better understand the science content they teach. This Science Object is the fourth of four Science Objects in the Rocks SciPack. It investigates how geologists have used rocks to help determine the approximate age of the Earth and provide a timeline of how the Earth’s surface and environments have changed over time. Scientists have tools to estimate...  [view full summary]
Science Objects are two hour on-line interactive inquiry-based content modules that help teachers better understand the science content they teach. This Science Object is the fourth of four Science Objects in the Rocks SciPack. It investigates how geologists have used rocks to help determine the approximate age of the Earth and provide a timeline of how the Earth’s surface and environments have changed over time. Scientists have tools to estimate the ages of rock and the overall time scale of the rock cycle. Some processes happen quickly and some happen slowly, but the oldest rocks indicate that the rock cycle has been recycling Earth’s material continuously for roughly 4 billion years. The same processes have been at work throughout Earth’s history, and therefore scientists can use the present to interpret the past. Observations of rock (textures, minerals, and fossils found within it) provides evidence of the environment and processes through which it formed, including the pressures, temperatures, and forces that created it.
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Rocks: Cycling Science Object
Science Object
Rocks: Cycling
Grade Level: Elementary School, High School, Middle School
Science Objects are two hour on-line interactive inquiry-based content modules that help teachers better understand the science content they teach. This Science Object is the third of four Science Objects in the Rocks SciPack. It explores the variables that contribute to rock transformation and the continuous processes of rock formation that constitute the rock cycle. The rock cycle provides an example of the transfer of energy and mass in the Earth...  [view full summary]
Science Objects are two hour on-line interactive inquiry-based content modules that help teachers better understand the science content they teach. This Science Object is the third of four Science Objects in the Rocks SciPack. It explores the variables that contribute to rock transformation and the continuous processes of rock formation that constitute the rock cycle. The rock cycle provides an example of the transfer of energy and mass in the Earth system. Earth is a closed system containing essentially a fixed amount of each element. Movement of matter is driven by the Earth’s internal and external sources of energy, and is often accompanied by changes in the physical and chemical properties of the matter. Minerals are made, dissolved, and remade—on the Earth's surface, in the oceans, and in the hot, high-pressure layers beneath the crust. The total amount of material stays the same as its forms change.
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Science of Food Safety: Growth and Reproduction of Cells Science Object
Science Object
Science of Food Safety: Growth and Reproduction of Cells
Grade Level: Elementary School, Middle School
Science Objects are two hour on-line interactive inquiry-based content modules that help teachers better understand the science content they teach. This Science Object, co-developed between FDA and NSTA, second of four Science Objects in the Food Science Safety SciPack. It explores cell functions involving chemical reactions that are made possible by protein catalysts called enzymes. These reactions require a fairly narrow range of temperature and...  [view full summary]
Science Objects are two hour on-line interactive inquiry-based content modules that help teachers better understand the science content they teach. This Science Object, co-developed between FDA and NSTA, second of four Science Objects in the Food Science Safety SciPack. It explores cell functions involving chemical reactions that are made possible by protein catalysts called enzymes. These reactions require a fairly narrow range of temperature and pH. Low temperatures cause them to go too slowly, and high temperatures or acidity can change cell structures. Molecules from the environment may also attach to or pass through a cell's membrane and affect reaction rates. Cells such as bacteria require energy and nutrients from their environment for survival. When they grow to a certain size, bacteria can reproduce by creating a copy of their DNA and then splitting in two. Under optimal conditions, this doubling of bacteria and each of their generated offspring can proceed at a fast rate, expanding a bacterial colony rapidly in a short time. Many of the precautions taken to protect the health of humans focus on limiting the growth of bacterial colonies by creating environmental conditions not favorable for their functioning or reproduction. Variations in genetic information within a population of bacteria can permit some individuals to survive and reproduce more effectively than others in a given environment. Such hardier individuals usually represent only tiny fractions of a population, but their rapid reproduction can quickly give rise to large numbers of successful offspring. This process may give rise to bacterial strains able to survive under new conditions, such as strains with resistance to overused antibacterial drugs, or grant previously harmless bacteria the ability to cause disease.


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Solar System: The Earth in Space Science Object
Science Object
Solar System: The Earth in Space
Grade Level: Elementary School, High School, Middle School
Science Objects are two hour on-line interactive inquiry-based content modules that help teachers better understand the science content they teach.This Science Object, co-developed between NASA and NSTA, is the first of four Science Objects in the Solar System SciPack. It provides an understanding of where Earth is located in space and explores evidence used by astronomers to place Earth at this location. Earth is a relatively small planet and the...  [view full summary]
Science Objects are two hour on-line interactive inquiry-based content modules that help teachers better understand the science content they teach.This Science Object, co-developed between NASA and NSTA, is the first of four Science Objects in the Solar System SciPack. It provides an understanding of where Earth is located in space and explores evidence used by astronomers to place Earth at this location. Earth is a relatively small planet and the third from the Sun in our solar system. The Sun is the central and largest body in the solar system. Our still-growing knowledge of the solar system comes to us in part by direct observation from Earth, including the use of optical, radio, and x-ray telescopes that are sensitive to a broad spectrum of information coming to us from space; computers that can undertake increasingly complicated calculations, find patterns in data, and support or reject theories about the origins of the solar system; and space probes that send back detailed pictures and other data from distant planets.
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Solar System: Formation of Our Solar System Science Object
Science Object
Solar System: Formation of Our Solar System
Grade Level: Elementary School, High School, Middle School
Science Objects are two hour on-line interactive inquiry-based content modules that help teachers better understand the science content they teach. This Science Object, co-developed between NASA and NSTA, is the fourth of four Science Objects in the Solar System SciPack. It explores the hypothesis that the solar system coalesced out of a giant cloud of gas and debris left in the wake of exploding stars about five billion years ago. Everything in and...  [view full summary]
Science Objects are two hour on-line interactive inquiry-based content modules that help teachers better understand the science content they teach. This Science Object, co-developed between NASA and NSTA, is the fourth of four Science Objects in the Solar System SciPack. It explores the hypothesis that the solar system coalesced out of a giant cloud of gas and debris left in the wake of exploding stars about five billion years ago. Everything in and on the earth, including living organisms, is made of the material from this cloud. As Earth and the other planets formed, the heavier elements fell to their centers. On planets closer to the Sun (the inner planets), the lightest elements and their compounds were mostly blown or boiled away by radiation from the newly formed sun. However, on the outer planets, the lighter substances still surround them as deep atmospheres of gas or as frozen solid layers.
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Solar System: Asteroids, Comets, and Meteorites Science Object
Science Object
Solar System: Asteroids, Comets, and Meteorites
Grade Level: Elementary School, Middle School
Science Objects are two hour on-line interactive inquiry-based content modules that help teachers better understand the science content they teach. This Science Object, co-developed between NASA and NSTA, is the third of four Science Objects in the Solar System SciPack. It provides an understanding of the bodies other than planets that exist in our solar system. There are many asteroids and meteoroids composed of rock orbiting the Sun. Occasionally,...  [view full summary]
Science Objects are two hour on-line interactive inquiry-based content modules that help teachers better understand the science content they teach. This Science Object, co-developed between NASA and NSTA, is the third of four Science Objects in the Solar System SciPack. It provides an understanding of the bodies other than planets that exist in our solar system. There are many asteroids and meteoroids composed of rock orbiting the Sun. Occasionally, one of these bodies enters the Earth’s atmosphere, glowing as they disintegrate from atmospheric friction. Those that do not completely burn up in the atmosphere may impact the ground. Other chunks of rock mixed with ice have such long and off-center orbits that they only periodically come very close to the Sun, where some of their surface material is boiled off by the Sun's radiation and pushed into a long illuminated tail that we see as a comet.
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Solar System: A Look at the Planets Science Object
Science Object
Solar System: A Look at the Planets
Grade Level: Elementary School, High School, Middle School
Science Objects are two hour on-line interactive inquiry-based content modules that help teachers better understand the science content they teach. This Science Object, co-developed between NASA and NSTA, is the second of four Science Objects in the Solar System SciPack. It explores the similarities and differences in the planets that make up our solar system. Each planet moves around the Sun in the same direction in a nearly circular orbit, though...  [view full summary]
Science Objects are two hour on-line interactive inquiry-based content modules that help teachers better understand the science content they teach. This Science Object, co-developed between NASA and NSTA, is the second of four Science Objects in the Solar System SciPack. It explores the similarities and differences in the planets that make up our solar system. Each planet moves around the Sun in the same direction in a nearly circular orbit, though each planet has its own unique orbital period and speed. The planets vary in size, surface and atmospheric composition, and surface features. In orbit around the planets, we find a great variety of moons, flat rings of rock and ice debris, and/or artificial satellites. Features of many of the planets and their moons show evidence of formation and evolutionary processes similar to those that occur on Earth. These processes include earthquakes, lava flows, erosion, and changes in the atmosphere.
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Rocks: Environments of Formation Science Object
Science Object
Rocks: Environments of Formation
Grade Level: Elementary School, High School, Middle School
Science Objects are two hour on-line interactive inquiry-based content modules that help teachers better understand the science content they teach. This Science Object is the second of four Science Objects in the Rocks SciPack. It provides an in-depth exploration of the conditions and environment required during the formation of igneous, sedimentary, and metamorphic rocks. Igneous rock forms from the cooling and crystallization of magma. Sometimes...  [view full summary]
Science Objects are two hour on-line interactive inquiry-based content modules that help teachers better understand the science content they teach. This Science Object is the second of four Science Objects in the Rocks SciPack. It provides an in-depth exploration of the conditions and environment required during the formation of igneous, sedimentary, and metamorphic rocks. Igneous rock forms from the cooling and crystallization of magma. Sometimes the magma reaches Earth’s surface and cools quickly; sometimes it does not reach the surface and thus cools slowly. Rocks at Earth's surface are subjected to processes of weathering and erosion, producing sediments as they are broken down. Sedimentary rock is formed when sediments are buried and solidified through various processes. Sedimentary rock buried deep enough may be transformed into metamorphic rock or melted down to magma. Rock formed deep within the crust (either igneous or metamorphic) may be forced up again to become land surface and even mountains by the forces that drive the motion of Earth’s plates. Subsequently, this new rock too will erode.
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Rocks: Categories by Process Science Object
Science Object
Rocks: Categories by Process
Grade Level: Elementary School, High School, Middle School
Science Objects are two hour on-line interactive inquiry-based content modules that help teachers better understand the science content they teach. This Science Object is the first of four Science Objects in the Rocks SciPack. It provides an introduction to what rocks are, how and where they form, and what we can tell about a rock’s formation by making observations about its characteristics. Different rocks have different compositions (element and...  [view full summary]
Science Objects are two hour on-line interactive inquiry-based content modules that help teachers better understand the science content they teach. This Science Object is the first of four Science Objects in the Rocks SciPack. It provides an introduction to what rocks are, how and where they form, and what we can tell about a rock’s formation by making observations about its characteristics. Different rocks have different compositions (element and mineral assemblages) and textures (grain size, orientation, etc.) Important observations of rock include characteristics of both a sample of the rock and its larger geologic context and natural setting. Observations of rocks can tell us about the processes and the environment in which they formed. The major categories of Earth’s rocks include igneous rock, sedimentary rock, and metamorphic rock.
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Resources and Human Impact: Using Technology to Address Resource Use Issues Science Object
Science Object
Resources and Human Impact: Using Technology to Address Resource Use Issues
Grade Level: Elementary School, Middle School
Science Objects are two hour on-line interactive inquiry-based content modules that help teachers better understand the science content they teach. This Science Object, co-developed between NOAA and NSTA, is the last of four Science Objects in the Resources and Human Impact SciPack. It explores how human beings impact other species and the ecosystems in which they live. Due to our role in changing the environment, humans have a responsibility for...  [view full summary]
Science Objects are two hour on-line interactive inquiry-based content modules that help teachers better understand the science content they teach. This Science Object, co-developed between NOAA and NSTA, is the last of four Science Objects in the Resources and Human Impact SciPack. It explores how human beings impact other species and the ecosystems in which they live. Due to our role in changing the environment, humans have a responsibility for preserving their habitat. There are a variety of approaches to reducing or reversing the human impact on the environment such as limiting population growth, reducing resource use, modifying population distribution, recycling resources, and the wise use of technology to solve problems. Managing resources by cleaning up polluted air, water, or soil or restoring depleted soil, forests, or fishing grounds can be difficult and costly but are critical for human health. Alternative energy resources such as wind, tides, and solar radiation can be utilized to reduce the consumption of fossil fuel-based energy sources. Social, political, and economic factors involve tradeoffs that will strongly influence the types and extent to which technologies will be developed and used.
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