This 20-minute video lesson discusses how variation can be introduced into a species. [Biology playlist: Lesson 7 of 71].

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This 23-minute video provides an introduction to viruses. [Biology playlist: Lesson 19 of 71].

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

Learn the basics of why sweat cools your body down in this video. [5:13]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This video will explore the pH scale. See some examples of how to calculate the pH of water, orange juice, and bleach. [11:37]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This ZOOM video segment shows how to create a self-contained environment and explores evaporation, condensation, and precipitation.

This interactive resource adapted from NASA describes the different temperature, precipitation, and vegetation patterns in seven biomes: coniferous forest, temperate deciduous forest, desert, grassland, rainforest, shrubland, and tundra.

Students learn about biomimicry and how engineers often imitate nature in the design of innovative new products. They demonstrate their knowledge of biomimicry by practicing brainstorming and designing a new product based on what they know about animals and nature.

There are almost as many types of bird beaks as there are types of food that birds like to eat. This collection of images shows a wide range of beaks and the types of foods handled by each.

This activity is a field investigation of the bird population in the schoolyard and how the students will plan to attract more birds.

In this lesson, students will explore the structures of generalized and specialized cells like brain cells, by engaging with the Looking Inside: Cells VR app, then applying that knowledge to a neuron activity worksheet. Students will then connect structure and function in a neuron by exploring neural networks and communication through the Build Your Network digital interactive. This lesson plan is 1 of 2 that are meant to be taught in sequence, as students apply the knowledge from lesson 1 to lesson 2.

Estimated time required: 1-2 class periods.

Technology required for this lesson: Laptop/Desktop, VR Headset (Optional).

This lesson is designed to introduce students to the unique structure of neurons and how they communicate with each other through cell structure review via the Looking Inside: Cells app and a hands-on neurotransmission game. This lesson plan is 2 of 2 that are meant to be taught in sequence, as students apply the knowledge from lesson 1 to lesson 2.

Estimated time required: 1-2 class periods.

Technology required for this lesson: Laptop/Desktop, VR Headset (Optional).

This classroom lab is a guided practice for inquiry using brine shrimp as the subject to be investigated.

This activity is a field investigation where students gather data on physical characteristics of the ecosystem surrounding their school.

This activity is a field investigation where students gather data on physical changes of the ecosystem surrounding their school habitat.

In this Spreadsheets Across the Curriculum module, students build spreadsheets and draw graphs to explore a chemical buffer's ability to resist pH change, i.e., the buffer capacity. Quantification of buffer capacity is conceptually straightforward but involves multiple repetitive calculations. The key relationship is the Henderson-Hasselbalch equation: , which follows from the Law of Mass Action and The spreadsheets automate many of the calculations, thereby simplifying the process. Instead of focusing on the calculations, students can see what buffer capacity means and focus on the a deeper understanding of its implications. After reviewing several buffer calculations, the stduents use the spreadsheet to investigate buffer capacity graphically and characterize blood's physiological buffer system. While solving the question of how many breaths one can take before alkalosis sets in, the students manipulate a logarithmic equation, do "what if" modeling, and analyze rates of change from plots of their cacluated results.

This activity is a biology lab investigation where students create habitats to observe decomposers in a controlled setting.

Submitted as part of the California Learning Resource Network (CLRN) Phase 3 Digital Textbook Initiative (CA DTI3), CK-12 Foundation’s high school Biology FlexBook covers cell biology, genetics, evolution, ecology, botany, zoology, and physiology. This digital textbook was reviewed for its alignment with California content standards.

CK-12’s Life Science delivers a full course of study in the life sciences for the middle school student, relating an understanding of the history, disciplines, tools, and modern techniques of science to the exploration of cell biology, molecular biology, genetics, evolution, prokaryotes, protists,fungi, plants, animals, invertebrates, vertebrates, human biology, and ecology. This digital textbook was reviewed for its alignment with California content standards.

CK-12’s Life Science delivers a full course of study in the life sciences for the middle school student, relating an understanding of the history, disciplines, tools, and modern techniques of science to the exploration of cell biology, genetics, evolution, prokaryotes, protists, fungi, plants, the animal kingdom, the human body, and ecology. This digital textbook was reviewed for its alignment with California content standards.