Students will use an online calculator to estimate their household's carbon footprint and explore various actions to reduce it.
In this biology lesson with math and ELA integration, students use real rock pocket mouse data to illustrate the Hardy-Weinberg principle.
Students will explore how human population growth, air pollution, agriculture, mining, water use, and other human activities have impacted the environment and the mark they will leave in the fossil record.
This virtual lab will familiarize students with the techniques used to identify different types of bacteria based on their DNA sequences.
In their study of the medium ground finches, evolutionary biologists Peter and Rosemary Grant were able to track the evolution of beak size twice in an amazingly short period of time due to two major droughts that occurred in the 1970s and 1980s. This activity simulates the food availability during these droughts and demonstrates how rapidly natural selection can act when the environment changes. Students use two different types of tools to represent different beak types to see which is best adapted to collect and eat seeds of different sizes. Students collect and analyze data and draw conclusions about traits that offer a selective advantage under different environmental conditions. They have the option of using an Excel spreadsheet to calculate different descriptive statistics and interpret graphs.
Students use DNA profiling, or fingerprinting, to solve two cases of elephant poaching in this interactive. In the process they will learn about genetic markers, PCR, gel electrophoresis, allele frequencies, and population genetics.
This animation illustrates how we hear sound. Sounds from the outside world pass as vibrations through tiny bones in our ear to the cochlea. Within the coiled tube of the cochlea, different regions of the basilar membrane sense different sound frequencies at specific. This animation demonstrates how high-frequency sounds penetrate only a short distance along the basilar membrane and how vibrations from low tones are sensed at the farthest end of the basilar membrane.
Students trace the evolutionary history of birds by comparing the shapes and structures of certain bones in a chicken to those of some of its extinct and living relatives in this interactive.
In this lesson, students watch a video of scientists finding, collecting, and dating fossils. They then answer questions about scientific processes and work with ratios and proportions to solve simple algebraic equations relating to fossil data. Recommended for middle school life/earch science, high school environmental science, or high school biology.
In this computer-based activity, students download, graph, and analyze authentic satellite temperature data for coral reef sites around the world. The activity includes a mapping component so the students work individually on one particular coral reef location and then the findings for the whole class are summarized on a set of world maps. After observing global trends in the data, students evaluate the threat to coral reefs from heat stress, which has been occurring with increased intensity and frequency in recent years.
This interactive resource explains how DNA sequences can be used to generate phylogenetic trees, and how to interpret them.
This brief video clip discusses how reactive molecules, such as free radicals, and solar radiation can lead to mutations in DNA.
This film traces the uncovering of key clues that led to the stunning discovery that an asteroid struck the Earth 66 million years ago, triggering a mass extinction of animals, plants, and even microorganisms. Each act illustrates the nature and power of the scientific method. Representing a rare instance in which many different disciplines (geology, physics, biology, chemistry, paleontology) contributed to a revolutionary theory, the film is intended for students in all science classes. Supporting materials are provided.
Students learn that atmospheric composition is one of the major factors in the long-term control of Earth's climate. They then build a model of how carbon cycles through the Earth system.
Students explore the phases, checkpoints, and protein regulators of the cell cycle and find out how mutated versions of these proteins can lead to the development of cancer in this interactive resource.