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Earth, Sun, and Moon: General Characteristics of Earth Science Object
Science Object
Earth, Sun, and Moon: General Characteristics of Earth
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 Earth, Sun, and Moon SciPack. It provides an understanding of how the different spheres (atmosphere, lithosphere, and hydrosphere) of Earth interact and why each plays an important role in making 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, co-developed between NASA and NSTA, is the first of four Science Objects in the Earth, Sun, and Moon SciPack. It provides an understanding of how the different spheres (atmosphere, lithosphere, and hydrosphere) of Earth interact and why each plays an important role in making Earth the only planet with the conditions necessary for life. Earth is approximately spherical in shape like all planets and stars. Earth is composed mostly of rock. Three-fourths of its surface is covered by a relatively thin layer of water (some of it frozen), and the entire planet is surrounded by a relatively thin blanket of air.
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Energy: Useful and Not So Useful Energy Science Object
Science Object
Energy: Useful and Not So Useful Energy
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 Energy SciPack. It provides a conceptual and real-world understanding of why energy in some forms can easily be used but in other forms is difficult to use. Energy transformations usually produce some heat, which is transferred to cooler...  [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 Energy SciPack. It provides a conceptual and real-world understanding of why energy in some forms can easily be used but in other forms is difficult to use. Energy transformations usually produce some heat, which is transferred to cooler places or objects in the surrounding area via radiation or conduction. In such interactions the number of atoms or molecules is very large and statistics dictate that they will end up with less order than that the initial state. Although just as much total energy remains, it is more widely distributed or spread out which means less can be done with it. This is because useful transfer of energy can be accomplished only when energy is concentrated (such as in falling water, in high-energy molecules in fuels and food, or in radiation from sources such as the intensely hot sun).
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Energy: Thermal Energy, Heat, and Temperature Science Object
Science Object
Energy: Thermal Energy, Heat, and Temperature
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 Energy SciPack. It provides a conceptual and real-world understanding of the relationship between thermal energy, heat, and temperature. The thermal energy of a material consists of the disordered motion of its atoms or molecules. Thermal...  [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 Energy SciPack. It provides a conceptual and real-world understanding of the relationship between thermal energy, heat, and temperature. The thermal energy of a material consists of the disordered motion of its atoms or molecules. Thermal energy can be transferred through materials or from one material to another by conduction (the collisions of atoms), or across space by radiation. If the material is fluid, convection currents aid the transfer of thermal energy (convection). When thermal energy is transferred it is called heat. Temperature is a measure of the average kinetic energy of atoms and molecules in a material.
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Earth, Sun, and Moon: Earth's Seasons Science Object
Science Object
Earth, Sun, and Moon: Earth's Seasons
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 last of four Science Objects in the Earth, Sun, and Moon SciPack. It provides an understanding of why we have different seasons on Earth and why seasons vary from one location on Earth and another. The Sun is the major source of energy 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 NASA and NSTA, is the last of four Science Objects in the Earth, Sun, and Moon SciPack. It provides an understanding of why we have different seasons on Earth and why seasons vary from one location on Earth and another. The Sun is the major source of energy for phenomena on Earth’s surface. The seasons are caused by the tilt of Earth’s axis with respect to the plane of its orbit around the Sun. Because the angle and direction of tilt does not change as Earth orbits the Sun, during half of the year the north polar region tilts toward the Sun, resulting in increased heating (summer) and away from the Sun during the other half of the year, resulting in cooling (winter). The seasons are reversed in the Southern Hemisphere.
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Earth, Sun, and Moon: Motion of the Moon Science Object
Science Object
Earth, Sun, and Moon: Motion of the Moon
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 Earth, Sun, and Moon SciPack. It provides an understanding of the moon’s orbit around Earth and the phases of the moon as experienced from Earth’s surface. The Moon orbits Earth approximately once per month,...  [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 Earth, Sun, and Moon SciPack. It provides an understanding of the moon’s orbit around Earth and the phases of the moon as experienced from Earth’s surface. The Moon orbits Earth approximately once per month, causing the pattern of moon phases. Although half of the Moon’s surface is always illuminated by the Sun and half is always shaded, the portion of the illuminated surface that we see changes as the Moon orbits Earth.
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Earth, Sun, and Moon: Our Moving Earth Science Object
Science Object
Earth, Sun, and Moon: Our Moving Earth
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 second of four Science Objects in the Earth, Sun, and Moon SciPack. It provides an understanding of how we know that Earth moves in a nearly circular orbit around the Sun once per year, so that we see different constellations at different...  [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 Earth, Sun, and Moon SciPack. It provides an understanding of how we know that Earth moves in a nearly circular orbit around the Sun once per year, so that we see different constellations at different times of the year. Earth rotates on its axis once per day, making it appear as though the Sun, the Moon, and the stars revolve around Earth each day. Evidence however, demonstrates that it is in fact, Earth that rotates on its axis as it orbits the Sun, just as other planets in our solar system.
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Electric and Magnetic Forces: Electrostatics and Current Electricity Science Object
Science Object
Electric and Magnetic Forces: Electrostatics and Current Electricity
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 is the second of three Science Objects in the Electric and Magnetic Forces SciPack. It explores the ability of electrons to flow, producing an electric current. Negative charges, being associated with electrons on the outer edges of atoms, are far more mobile in materials than...  [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 three Science Objects in the Electric and Magnetic Forces SciPack. It explores the ability of electrons to flow, producing an electric current. Negative charges, being associated with electrons on the outer edges of atoms, are far more mobile in materials than positive charges located in the nucleus at the center of an atom. In some materials, such as metals, electrons flow easily, whereas in insulating materials such as glass they can hardly flow at all. At very low temperatures, some materials become superconductors and offer no resistance to the flow of current. In between these extremes, semi-conducting materials differ greatly in how well they conduct, depending on their exact composition. Electric currents occur when charges move through conductors. Batteries and other devices store electrical energy by separating and concentrating charges. Electrical circuits provide a means of transferring electrical energy into other forms of energy such as heat, light, and sound.
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Electric and Magnetic Forces: Electric Charges Science Object
Science Object
Electric and Magnetic Forces: Electric Charges
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 is the first of three Science Objects in the Electric and Magnetic Forces SciPack. It explores electric charges and electric force. There are two kinds of charges—positive and negative. The electric force is a universal force that exists between any two charged objects. Like charges...  [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 three Science Objects in the Electric and Magnetic Forces SciPack. It explores electric charges and electric force. There are two kinds of charges—positive and negative. The electric force is a universal force that exists between any two charged objects. Like charges repel one another, and opposite charges attract. The strength of the force is directly proportional to the amount of charge, and inversely proportional to the square of the distance between them. On an atomic scale, the nucleus and electrons are the basic constituents of all atoms and create the electric forces that hold atoms and molecules together. On a larger scale, these forces hold solid and liquid materials together and act between objects when they are in contact (for example, friction or the impact of a bat on a ball). In materials, there are almost exactly equal proportions of positive and negative charges, making the materials as a whole electrically neutral. An imbalance in these opposite charges will produce phenomena that range from electric sparks and clinging clothes to lightning.
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Earth's Changing Surface: Humans as Agents of Change Science Object
Science Object
Earth's Changing Surface: Humans as Agents of Change
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 is the last of three Science Objects in the Earth’s Changing Surface SciPack. It explores the natural and human influences on landscape evolution. These influences sometimes accelerate or slow down the process of landscape evolution. Human activities such as deforestation, accelerated...  [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 last of three Science Objects in the Earth’s Changing Surface SciPack. It explores the natural and human influences on landscape evolution. These influences sometimes accelerate or slow down the process of landscape evolution. Human activities such as deforestation, accelerated global warming, and mining have impacted Earth’s changing surface. These activities are not new processes but often increase or accentuate the natural processes. When natural processes are accelerated, humans are often affected by the changes in their environment.
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Energy: Energy Transformations Science Object
Science Object
Energy: Energy Transformations
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 Energy SciPack. It provides a conceptual and real-world understanding of how energy is transferred, from object to object and from one form of energy to another. Although the various forms of energy appear different, each can be measured...  [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 Energy SciPack. It provides a conceptual and real-world understanding of how energy is transferred, from object to object and from one form of energy to another. Although the various forms of energy appear different, each can be measured in a closed system. This makes it possible to keep track of how much of one form of energy is converted into another form. Most of what goes on in the universe—from exploding stars and biological growth to the operation of machines and the motion of people—involves some form of energy being transformed into another form. The law of conservation of energy states that whenever the amount of energy in one place (or form) decreases, the amount of energy in other places (or forms) increases by the same amount.
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