NSTA RSS Feeds 

Search Results

 
Sort by:
Results: 1 - 10 of 2230 1 2 3 4 5 6 7 8 9 ... 223 Next
Captivating Cubes: Investigating Surface Area-to-Volume Ratio Book Chapter
Book Chapter
Captivating Cubes: Investigating Surface Area-to-Volume Ratio
By: M. Gail Jones, Amy R. Taylor, and Michael R. Falvo
Grade Level: High School, Middle School
In this two-part activity, students investigate how surface area-to-volume ratios change with cube size. Students apply those calculations to explore how surface area-to-volume relationships limit the size of cells. Extensions of these activities probe the role that surface area-to-volume relationships play in science contexts.
In this two-part activity, students investigate how surface area-to-volume ratios change with cube size. Students apply those calculations to explore how surface area-to-volume relationships limit the size of cells. Extensions of these activities probe the role that surface area-to-volume relationships play in science contexts.
[hide full abstract]
Member Price: $2.79      Nonmember Price: $3.49
Eggsactly Book Chapter
Book Chapter
Eggsactly
By: M. Gail Jones, Amy R. Taylor, and Michael R. Falvo
Grade Level: High School, Middle School
In this two-part activity, students make inferences about the relationships between egg size, incubation time, and bird size from data sets collected from hundreds of species of birds. Students will also investigate how an egg can exchange oxygen and carbon dioxide through pores in the eggshell. A four-day experiment allows students to explore the process of osmosis in the membrane of a chicken egg.
In this two-part activity, students make inferences about the relationships between egg size, incubation time, and bird size from data sets collected from hundreds of species of birds. Students will also investigate how an egg can exchange oxygen and carbon dioxide through pores in the eggshell. A four-day experiment allows students to explore the process of osmosis in the membrane of a chicken egg.
[hide full abstract]
Member Price: $2.79      Nonmember Price: $3.49
That’s Hot! The Effect of Size on Rate of Heat Loss Book Chapter
Book Chapter
That’s Hot! The Effect of Size on Rate of Heat Loss
By: M. Gail Jones, Amy R. Taylor, and Michael R. Falvo
Grade Level: High School, Middle School
Through the use of common household items such as aluminum pans and thermometers, students will investigate how the size and shape of an object affect the rate of heat loss from the object to the environment. This lesson is relevant to biology, as it relates to the size and shape of animals, their metabolism, and their ability to live in very cold or hot environments. A rate of heat loss that is too fast or too slow may affect the survival of an organism....  [view full summary]
Through the use of common household items such as aluminum pans and thermometers, students will investigate how the size and shape of an object affect the rate of heat loss from the object to the environment. This lesson is relevant to biology, as it relates to the size and shape of animals, their metabolism, and their ability to live in very cold or hot environments. A rate of heat loss that is too fast or too slow may affect the survival of an organism. By modeling different shapes and sizes of organisms using containers of various sizes, students explore how these variables affect the rate of heat loss.
[hide full abstract]
Member Price: $2.79      Nonmember Price: $3.49
Sweet! Exploring Surface Area of Sugar Molecules Book Chapter
Book Chapter
Sweet! Exploring Surface Area of Sugar Molecules
By: M. Gail Jones, Amy R. Taylor, and Michael R. Falvo
Grade Level: High School, Middle School
Two forces that are very familiar to us in our daily lives are gravity and adhesion. The force of gravity on an object, which we commonly refer to as the object’s weight, is proportional to the volume of the object. Adhesion or stickiness, on the other hand, is a surface effect. As objects become smaller, the surface-to-volume ratio increases, changing the relative strengths of these two common forces. At the very small scales, such as the micro-...  [view full summary]
Two forces that are very familiar to us in our daily lives are gravity and adhesion. The force of gravity on an object, which we commonly refer to as the object’s weight, is proportional to the volume of the object. Adhesion or stickiness, on the other hand, is a surface effect. As objects become smaller, the surface-to-volume ratio increases, changing the relative strengths of these two common forces. At the very small scales, such as the micro- (cells) or nanoscales (molecules), the stickiness property completely dominates. This activity demonstrates a crossover point from the dominance of gravity for big objects (sugar cubes) to the dominance of adhesion for smaller objects (powdered sugar grains).
[hide full abstract]
Member Price: $2.79      Nonmember Price: $3.49
Flying Foam: The Scale of Forces Book Chapter
Book Chapter
Flying Foam: The Scale of Forces
By: M. Gail Jones, Amy R. Taylor, and Michael R. Falvo
Grade Level: Elementary School, Middle School
The forces that are important for very large objects can be quite different than the forces that are important for very small objects. A planet is essentially unaffected by all but the gravitational force, whereas a molecule experiences mostly chemical bonding forces and is almost completely unaffected by gravity. In the human-scale world, we also see differences in how large and small objects are affected by forces. Why is an ant able to walk upside...  [view full summary]
The forces that are important for very large objects can be quite different than the forces that are important for very small objects. A planet is essentially unaffected by all but the gravitational force, whereas a molecule experiences mostly chemical bonding forces and is almost completely unaffected by gravity. In the human-scale world, we also see differences in how large and small objects are affected by forces. Why is an ant able to walk upside down on a ceiling but an elephant cannot? This exercise introduces students to the concept of scale-dependent properties as they explore how the size of objects changes their behavior.
[hide full abstract]
Member Price: $2.79      Nonmember Price: $3.49
Stick With It Book Chapter
Book Chapter
Stick With It
By: M. Gail Jones, Amy R. Taylor, and Michael R. Falvo
Grade Level: High School, Middle School
The same material may behave differently at different scales. These variations can become critical in understanding science at very large or very small scales. In this investigation, students use Styrofoam to explore how changes in size affect electrostatic attraction. This investigation models the changes in behavior that take place at very small scales.
The same material may behave differently at different scales. These variations can become critical in understanding science at very large or very small scales. In this investigation, students use Styrofoam to explore how changes in size affect electrostatic attraction. This investigation models the changes in behavior that take place at very small scales.
[hide full abstract]
Member Price: $2.79      Nonmember Price: $3.49
Attack of the Giant Bug Book Chapter
Book Chapter
Attack of the Giant Bug
By: M. Gail Jones, Amy R. Taylor, and Michael R. Falvo
Grade Level: High School, Middle School
Could a bug ever be the size of a Volkswagen Beetle? Could a dragonfly be larger than a seagull? Movies often portray huge creatures that roam the Earth and sometimes terrorize humans. Could these scenarios actually happen, and if so, how? This activity explores the scale of common arthropods such as spiders and insects by demonstrating that living things have limits to their size.
Could a bug ever be the size of a Volkswagen Beetle? Could a dragonfly be larger than a seagull? Movies often portray huge creatures that roam the Earth and sometimes terrorize humans. Could these scenarios actually happen, and if so, how? This activity explores the scale of common arthropods such as spiders and insects by demonstrating that living things have limits to their size.
[hide full abstract]
Member Price: $2.79      Nonmember Price: $3.49
Types of Scale Book Chapter
Book Chapter
Types of Scale
By: M. Gail Jones, Amy R. Taylor, and Michael R. Falvo
Grade Level: Middle School
Across the different sciences one of the common challenges that researchers encounter is defining and measuring different variables. An essential part of that process is creating and using scales. In this investigation, students learn about a range of different scales that are used in everyday life. In addition, they create a unique scale to measure a new and novel variable.
Across the different sciences one of the common challenges that researchers encounter is defining and measuring different variables. An essential part of that process is creating and using scales. In this investigation, students learn about a range of different scales that are used in everyday life. In addition, they create a unique scale to measure a new and novel variable.
[hide full abstract]
Member Price: $2.79      Nonmember Price: $3.49
Zoom Zoom: Magnification Book Chapter
Book Chapter
Zoom Zoom: Magnification
By: M. Gail Jones, Amy R. Taylor, and Michael R. Falvo
Grade Level: High School, Middle School
As science extends into the very large and the very small ends of the scale, the images of objects and materials lose recognizable contexts and can be very complex. New advances in microscopes and telescopes allow us to zoom in on very tiny and very distant objects and see amazing new worlds. This investigation involves students in thinking about the changes in scale that take place as we zoom in on very small and very large objects.
As science extends into the very large and the very small ends of the scale, the images of objects and materials lose recognizable contexts and can be very complex. New advances in microscopes and telescopes allow us to zoom in on very tiny and very distant objects and see amazing new worlds. This investigation involves students in thinking about the changes in scale that take place as we zoom in on very small and very large objects.
[hide full abstract]
Member Price: $2.79      Nonmember Price: $3.49
Observing Nature Book Chapter
Book Chapter
Observing Nature
By: Judy Scotchmoor (Revised New Edition), Robert Stebbins, David Ipsen, Gretchen L. Gillfillan, and Judy Diamond (Revised New Edition)
Grade Level: Elementary School, Middle School
In this activity, students will be asked to review their experiments from the previous chapters. Throughout this book, the students have studied animal coloration through the use of models, rather than by investigating living animals. This activity gives students the opportunity to use the knowledge they have gained to design an investigation in a real life setting.
In this activity, students will be asked to review their experiments from the previous chapters. Throughout this book, the students have studied animal coloration through the use of models, rather than by investigating living animals. This activity gives students the opportunity to use the knowledge they have gained to design an investigation in a real life setting.
[hide full abstract]
Member Price: $2.79      Nonmember Price: $3.49
Results: 1 - 10 of 2230 1 2 3 4 5 6 7 8 9 ... 223 Next