This lesson is about counting by fives from AAAmath.com. There are separate sections for learning, practice, playing a game, and exploring more about skip counting.
Biology 2e is designed to cover the scope and sequence requirements of a typical two-semester biology course for science majors. The text provides comprehensive coverage of foundational research and core biology concepts through an evolutionary lens. Biology includes rich features that engage students in scientific inquiry, highlight careers in the biological sciences, and offer everyday applications. The book also includes various types of practice and homework questions that help students understand—and apply—key concepts. The 2nd edition has been revised to incorporate clearer, more current, and more dynamic explanations, while maintaining the same organization as the first edition. Art and illustrations have been substantially improved, and the textbook features additional assessments and related resources.
By the end of this section, you will be able to do the following:
Describe the relationship of amplitude and frequency of a sound wave to attributes of sound
Trace the path of sound through the auditory system to the site of transduction of sound
Identify the structures of the vestibular system that respond to gravity
By the end of this section, you will be able to do the following:
Identify the general and special senses in humans
Describe three important steps in sensory perception
Explain the concept of just-noticeable difference in sensory perception
By the end of this section, you will be able to do the following:
Describe four important mechanoreceptors in human skin
Describe the topographical distribution of somatosensory receptors between glabrous and hairy skin
Explain why the perception of pain is subjective
By the end of this section, you will be able to do the following:
Explain in what way smell and taste stimuli differ from other sensory stimuli
Identify the five primary tastes that can be distinguished by humans
Explain in anatomical terms why a dog’s sense of smell is more acute than a human’s
By the end of this section, you will be able to do the following:
Explain how electromagnetic waves differ from sound waves
Trace the path of light through the eye to the point of the optic nerve
Explain tonic activity as it is manifested in photoreceptors in the retina
Explore how journalists “filter” information, or determine which events and issues to cover in a given news cycle, by using key criteria. A free educator account is necessary to assign this Checkology lesson.
Zoologist Dan-Erik Nilsson demonstrates how the complex human eye could have evolved from simple light-sensitive cells. From a PBS show called "Evolution: Darwin's Dangerous Idea." Includes background reading material and discussion questions. [4:08]
This website provides the full text of Jane Austen's novel, "Emma." Also included is a brief paragraph with information on the novel's context, main characters, and major events.
At this website, read the full textr of Jane Austen's "Mansfield Park." Novel's chapters are preceded by a brief paragraph introcuding the novel, its characters, and its major events.
Here, read the full text of Jane Austen's "Pride and Prejudice." The novel's chapters are preceded by a brief paragraph introducing the story's major characters and events.
This is a collection of three videos from the 2008 MASTERPIECE adaptation of Jane Austen's "Sense and Sensibility." Teaching materials are included.
Review or learn the basics of single-digit subtraction in this concise lesson that has related vocabulary and strategies for solving subtraction problems. This lesson includes lots of examples and links for two interactive subtraction games. Both games are fast-paced and give immediate feedback to your responses.
Vision is the primary sense of many animals and much is known about how vision is processed in the mammalian nervous system. One distinct property of the primary visual cortex is a highly organized pattern of sensitivity to location and orientation of objects in the visual field. But how did we learn this? An important tool is the ability to design experiments to map out the structure and response of a system such as vision. In this activity, students learn about the visual system and then conduct a model experiment to map the visual field response of a Panoptes robot. (In Greek mythology, Argus Panoptes was the "all-seeing" watchman giant with 100 eyes.) A simple activity modification enables a true black box experiment, in which students do not directly observe how the visual system is configured, and must match the input to the output in order to reconstruct the unseen system inside the box.
This tutorial looks at the anatomy of the eye and how the sense of sight works. This is the first part of a learning module. Subsequent sections cover how images are formed and detected, the concept of accommodation where the eye adjusts its focus, and how farsightedness and nearsightedness are corrected. Includes detailed calculations using physics formulas, e.g., to find the quantitative relationship between the object distance, image distance, and focal length.
In this scene from the 2008 Masterpiece adaptation of Jane Austen's Sense and Sensibility, the Dashwood sisters and their mother first see their new home, Barton Cottage, a simple dwelling set against the tumultuous north Devon coast-and the viewer experiences it with them. As the camera swoops over the untamed sea, the cottage first appears large, then insignficant when set against the vast landscape. The Dashwood family, now very far away from the "civilized" world of society, is on its own. As we follow the family as they enter the cottage, each character's reaction-Mrs. Dashwood is overwhelmed, Marianne pronounces it "romantic," and Elinor is practical-reinforces what we already know about their personalities. [1:35]
The romance between Edward and Elinor is, for many, the heart of Sense and Sensibility, and Edward's proposal serves as the climax of the 2008 Masterpiece adaptation of Jane Austen's Sense and Sensibility. From the moment Edward arrives at the cottage, there is a palpable sense of suspense. As the scene unfolds-Edward declares his love and Elinor accepts amidst tears of joy-the happiness that the characters experience is so real and powerful that we find ourselves cheering them on. [2:15]
