Astronomy Lecture 2: Lives of the Stars

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In this second lecture of three in the Frontiers of Science unit on astronomy, Columbia University professor David Helfand explores the life history of a star, a biography encompassing millions of years, and how astrophysicists are able to trace stellar evolution. A lecture video and companion PowerPoint presentation are also available on FoSO.

Astronomy Lecture 1: What Is a Star?

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In this first lecture of three in the Frontiers of Science unit on astronomy, Columbia University professor David Helfand sifts through astrophysics jargon to explain the basic physics behind stars—"our signposts for measuring our place in the Universe and its history"—and how they evolve over cosmic time. A lecture video and companion PowerPoint presentation are also available on FoSO.

Astronomy Lecture 2: Lives of the Stars

Discipline:
Resource type:

Lives of the Stars

In this second lecture video of three in the Frontiers of Science unit on astronomy, Columbia University professor David Helfand explores the life history of a star, a biography encompassing millions of years, and how astrophysicists are able to trace stellar evolution. A lecture transcript and companion PowerPoint presentation are also available on FoSO.

Play video

Astronomy Lecture 1: What Is a Star?

Discipline:
Resource type:

What Is a Star?

In this first lecture video of three in the Frontiers of Science unit on astronomy, Columbia University professor David Helfand sifts through astrophysics jargon to explain the basic physics behind stars—"our signposts for measuring our place in the Universe and its history"—and how they evolve over cosmic time. A lecture transcript and companion PowerPoint presentation are also available on FoSO.

Play video

Astronomy Lecture 2: Lives of the Stars

Discipline:
Resource type:

Whirlpool galaxy (M51) and companion galaxy.

In this PowerPoint presentation, the second of three in the Frontiers of Science unit on astronomy, Columbia University professor David Helfand explores the life history of a star, a biography encompassing millions of years, and how astrophysicists are able to trace stellar evolution. A lecture video and transcript are also available on FoSO.

Astronomy Lecture 1: What Is a Star?

Discipline:
Resource type:

Stellar parallax.

In this PowerPoint presentation, the first of three in the Frontiers of Science unit on astronomy, Columbia University professor David Helfand sifts through astrophysics jargon to explain the basic physics behind stars—"our signposts for measuring our place in the Universe and its history"—and how they evolve over cosmic time. A lecture video and transcript are also available on FoSO.

Invasive Species and Population Dynamics

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Time series plot of balsam fir growth and moose population in Isle Royal National Park 1959–2003.

In this assignment, students will consider the effects of invasive species on ecosystems, and look at population dynamics in predator-prey relationships. In examining data from previous studies, students will apply their understanding of graphical displays of data and of statistical concepts (mean, standard deviation, variance, correlation, significance) to interpret research findings. This document serves as a student handout; an answer key is provided in an accompanying document.

Invasive Species and Population Dynamics

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Time series plot of wolf and moose populations in Isle Royal National Park 1959–2003.

In this assignment, students will consider the effects of invasive species on ecosystems and look at population dynamics in predator-prey relationships. In examining data from previous studies, students will apply their understanding of graphical displays of data and of statistical concepts (mean, standard deviation, variance, correlation, significance) to interpret research findings. This document serves as an answer key; a student handout is provided in an accompanying document.

Wombats and Bees

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Butterfly, bird, and plant declines.

This assignment requires students to consider data related to diversity in local animal populations. Students will apply their understanding of samples, populations, and statistics to data from several different published studies of biodiversity. This document serves as a student handout; an answer key is provided in an accompanying document.

Wombats and Bees

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Fruit-set effect sizes of pollen-supplementation experiments, North America.

This assignment requires students to consider data related to diversity in local animal populations. Students will apply their understanding of samples, populations, and statistics to data from several different published studies of biodiversity. This document serves as an answer key; a student handout is provided in an accompanying document.