## You are here

Home ›Now showing results **41-50** of **315**

The goal of this lesson is for two groups of students to exchange information (e.g., through poster presentations, Podcasts, debates, or PowerPoint presentations) about how two different theories explain a natural phenomenon: Newton's Law of... (View More) Gravitation and Einstein's General Theory of Relativity. The lesson will also illustrate how the scientific process allows a new, more complete theory to take the place of an older theory that does not produce accurate results for a new discovery. Students will need to have either studied both Newton's Law of Gravitation and Einstein's Theory of Relativity or be given the time and resources to look up this information. This lesson is part of the Cosmic Times teachers guide and is intended to be used in conjunction with the 1919 Cosmic Times Poster. (View Less)

Activities in this lesson promote a fundamental understanding of relationships between graphed data. Sample graphs allow students to become familiar with interpreting data and to recognize relationships between variables. Additional microsets of... (View More) atmospheric data (gases, clouds, pressures, temperatures, precipitation) are included. Students will use that data to predict the appearance of a graph, plot the data points, study the data pattern and draw a conclusion. In addition, students will determine if a relationship exists between two variables; leading to an understanding that relationships between variables can be more complicated than simple linear ones. This lesson uses student- and citizen science-friendly microsets of authentic NASA Earth system science data from the MY NASA DATA project. It also includes sample graphs, related links, extensions, and an online glossary. (View Less)

In this lesson, students explore a discrepant event when they design an experiment to measure the rate that ice melts when in pure water versus salt water. It is designed to help students realize that a carefully-designed experiment may yield... (View More) unexpected results, due to unseen events, even though the experiment is precisely planned and executed. The addition of a new technology may clarify factors in the experiment which were previously unknown. Note: the experiment requires advance preparation the day before: two buckets of water are set-up (one with plain tap water, the other with as much salt dissolved in it as possible), which need to be at room temperature. It also requires ice cubes of uniform shape (e.g., from an ice maker or ice trays filled to uniform capacity). This lesson is part of the Cosmic Times teachers guide and is intended to be used in conjunction with the 1993 Cosmic Times Poster. (View Less)

In this investigation, students use "point-source" light, light meters, and graphing software to quantify the reduction in light over distance. Through careful measurement of light received at several distances, students discover the best fit of the... (View More) data is the inverse square rule. Using this rule, students then calculate the distance between the light source and the light meter at random placements. Finally, students extend this principle to model the manner in which distances to Cepheid variable stars are measured. The distance between the Cepheid (here the light source) and the Earth (the light meter) can be determined by comparing the output of the source to the amount of light received. An historic scientific breakthrough occurred when the period-luminosity relationship of Cepheids was quantified throughout the early 1900s. This breakthrough allowed astronomers to gain a more correct understanding of the dimensions of our galaxy and the universe beyond. This activity is part of the "Cosmic Times" teacher's guide and is intended to be used in conjunction with the 1929 Cosmic Times Poster. (View Less)

In this lesson, students explore the cosmic microwave background to understand why it permeates the universe and why it peaks as microwave radiation. Students should be able to explain that the origin of the background radiation is the uniform... (View More) thermal radiation of the big bang and that the radiation produced was evenly distributed around the small early universe, causing it to permeate today's universe. This activity is part of the Cosmic Times teachers guide and is intended to be used in conjunction with the 1965 Cosmic Times Poster. (View Less)

In this lesson, students explore the cosmic microwave background to understand why a completely smooth (isotropic) background poses problems for the Universe we see today. Students will participate in an engagement activity which demonstrates how... (View More) very small variations in a pattern are unrecognizable without the use of technology. In the exploration and explanation sections of the lesson, students will understand why Big Bang theory requires variations in Cosmic Microwave Background (CMB) radiation (anisotropy); they also examine the significance of both anisotropic and isotropic observations. Finally, in the extension and evaluation sections, students complete activities that further reinforce and demonstrate their understanding of the material presented. This activity is part of the Cosmic Times teachers guide and is intended to be used in conjunction with the 1993 Cosmic Times Poster. (View Less)

In this lesson about comets, learners will use images to observe and compare the surfaces of two comet nuclei from close range. Separate teachers guides and students guides are provided. Supplementary resources needed for the lesson are provided and... (View More) include scientist and student audio tracks, and images of Wild 2, Tempel 1, and Hartley 2. (View Less)

In this lesson, students identify and describe unfamiliar scientist heroes who contributed to the field of science until the year 1929. Students create a T-square graphic organizer about a specific group of women scientists of the Harvard College... (View More) Observatory (a T-square is provided that has Facts Learned on one side and Big Ideas or Contributions on the other). The students will also research and complete a product (e.g., written report, multimedia product, podcast, blog, skit, etc.) and give a presentation on one of the unfamiliar scientist heroes they researched. This activity is from the Cosmic Times teacher's guide and is intended to be used in conjunction with the 1929 Cosmic Times poster. (View Less)

This is a lesson about the role of computers in space exploration. Learners will investigate various ways to improve mission design to maximize the scientific return. In the first activity, the students examine how the use of flowcharts can help... (View More) make computer programs error-free and efficient, in this way making the spacecraft more reliable. In the second activity, the students investigate how data can be compressed for transmission over limited bandwidth. By the end of the lesson, the students come to realize that the wealth of data gathered by spacecraft is useless if it cannot be transmitted safely and efficiently to the scientists on the Earth. (View Less)

This is a lesson about how spacecraft use gravity assists to get where they are going. Learners will explore how engineers minimize the use of fuel by utilizing gravity. In Activity 1, students explore the physical conservation laws by observing the... (View More) behavior of balls colliding with other objects. In Activity 2, the students use an interactive online simulation tool to explore the various ways in which gravity assists can be used to aid space exploration. (View Less)