In this episode, the universe as we know it starts to come into focus. Dr. Katie Mack teaches John Green about the cosmic dark ages, the possibility of a multiverse, and the connection between the hot, dense early universe and today.

Chapters:
Introduction
CMB & The Cosmic Web
The Possibility of a Multiverse
The Inflaton Field
Viewing Early Galaxies
The Surface of Last Scattering
The Dark Ages of the Cosmos
Dark Matter & Cosmic Dawn
Feeling Awe

During the last sunspot cycle between 1996-2008, over 21,000 flares and 13,000 clouds of plasma exploded from the Sun's magnetically active surface. These events create space weather. Students will learn more about space weather and how it affects Earth through reading a NASA press release and viewing a NASA eClips video segment. Then students will explore the statistics of various types of space weather storms by determining the mean, median and mode of a sample of storm events. This activity is part of the Space Math multimedia modules that integrate NASA press releases, NASA archival video, and mathematics problems targeted at specific math standards commonly encountered in middle school textbooks. The modules cover specific math topics at multiple levels of difficulty with real-world data and use the 5E instructional sequence.

SYNOPSIS: In this lesson, students analyze data, create line graphs, conduct research, and plan their data art project.

SCIENTIST NOTES: This lesson builds students' data analysis and research skills. Students learn how to use data to create an appealing artwork that can explain and raise awareness on climate change impacts. All materials are properly sourced, and datasets for analysis are accurate. The lesson has passed our science credibility process.

POSITIVES:
-Students learn how to create a line graph that includes title, x-axis label, y-axis label, data points, and a line connecting the data points.
-Students think critically in their groups and in whole class discussions.
-Students practice media literacy skills when conducting research.

ADDITIONAL PREREQUISITES:
-This is lesson 5 of 6 in our 3rd-5th grade Art for the Earth unit.
-Students should have a basic understanding of data analysis and why graphs are useful tools to view data.
-You may have to guide students to good resources when they are conducting research on their topic in the Investigate section. A great tip when students are doing online research is to use the PARC method, which stands for Purpose, Author, Reliability, and Currency. Students can ask of every website:
-What is the purpose of this website?
-Who is the author of this website?
-Is this website reliable?
-Is this website current?

DIFFERENTIATION:
-It may be best for students to collaborate when creating their line graphs. Grouping students with varying levels of logical-mathematical intelligence and spatial-visual intelligence would probably work best.
-Line graphs can also be created using technology tools, including iPads or Chromebooks.
-Your students may or may not have different line graphs. If the data comes from a true class campaign, all students will have the same line graph. If students gathered their own data for different issues or used the different available data from NASA, their line graphs will be different.
-The Inspire section is meant for students to prepare to complete their projects. They will actually finish their projects in the sixth lesson in this unit after discussing more about the impact of art on one's feelings, how colours affect emotions, and how to appeal to different audiences.

This is a webpage with videos that relate to the Deep Impact Encounter. Learners can watch videos about the mission, encounter, science, and results.

SYNOPSIS: In this lesson, students learn how climate change and deforestation are linked to the water cycle.

SCIENTIST NOTES: This lesson provides students with a background on the relationship between deforestation, water cycle, erosion, and climate change. It establishes the fact that deforestation poses stress on the forest ecosystem and services, including impacting the water cycle and speeding up erosion and climate change. These issues could be addressed with well-informed adaptive strategies and action to restore the forest and biodiversity. All materials have been verified thoroughly, and this lesson has passed the science credibility process.

POSITIVES:
-Students participate in multiple interactive and hands-on learning activities to engage in kinesthetic, auditory, and visual learning.
-Students continue to better their understanding of how Earth’s natural systems are interconnected and dependent on each other.

ADDITIONAL PREREQUISITES:
-This is lesson 3 of 4 in our 6th-8th grade Water Cycle, Deforestation, and Climate Change unit.
-Materials required for the erosion model activity include the following:
-Scissors or sharp knife
-Clean, empty one-gallon container with a lid (such as a plastic milk jug)
-Water
-Two aluminum bread pans
-Dirt
-Two aluminum, 9-by-13-inch cake pans
-12 to 14 plastic forks
-Two blocks, shallow plastic containers, or other items of the same height to prop up the aluminum bread pans
-Outdoor test area with a flat, level surface where it is easy to clean spilled water and soil

DIFFERENTIATION:
-The erosion activity may be completed as a hands-on activity in lab groups or as a demonstration by the teacher.
-Lab groups may be in mixed abilities to aid in understanding.
-Teachers can prepare examples of diagrams for students to reference during the Inspire section.

SYNOPSIS: In this lesson, students learn about deforestation, analyze paintings featuring deforestation themes, and then have the choice to learn about Wangari Maathai or design a climate action plan related to deforestation.

SCIENTIST NOTES: The lesson allows students to explore the importance of reforestation to combat climate change. There are no scientific misconceptions in the lesson except for one instance in the Young Voices for the Planet video, which is embedded on slide 19 of the Teacher Slideshow. At 3 minutes, 35 seconds into the video, the boy Julian says, "We plant trees to help climate change." This is an error because we plant trees to fight climate change. All other materials are properly sourced. Thus, this lesson has passed our science credibility process.

POSITIVES:
-There is opportunity for a lot of peer and group discussion in this lesson.
-Students share their own thoughts and feelings about Jill Pelto's art, validating how they feel about deforestation and climate change.

ADDITIONAL PREREQUISITES:
-This is lesson 2 of 6 in our 3rd-5th grade Art for the Earth unit.
-A stable Internet connection is required to play the videos, especially the Google Earth timelapse video.
-Students should have some background knowledge on Jill Pelto, which you can find in lesson 1 of our Art for the Earth unit.

DIFFERENTIATION:
-This entire lesson lends itself to discussion. Group students accordingly so they can get the most out of this lesson.
-The Google Earth timelapse video of deforestation can be emotional to watch. Students may react with anger, sadness, fear, or shock. Tell them that those feelings are normal and natural. You can also tell them that you are learning about deforestation and climate change in order to do something about it. Empowering your students is one of the most powerful gifts you can give them.
-Some students may be eager to share their thoughts and feelings about Jill Pelto's art. Let them share with the class. Some students, however, may want to keep their feelings to themselves. That is OK too.
-The Inspire section of this lesson features a lot of student agency. Some students may want to learn more about Wangari Maathai and then be "done" with the deforestation part of this unit. Other students may want to design an action plan for your school or community. Perhaps they'd like to plant more trees on your school grounds. Support these students appropriately, and perhaps their efforts will lead to a greener, healthier, calmer school environment.

In this video segment adapted from Navajo Technical College, meet a dendroclimatologist who studies the relationship between precipitation and tree growth in the Navajo Nation.

The relationship between mass, volume, and density is explored using chocolate. The mass and volume of solid chocolate bars, liquid chocolate, and small chocolate pieces are determined and used to compute density for comparison. The activity includes a worksheet that allows students to report their findings and infer density changes as a material goes from solid to liquid to gas.

In this activity, students measure the densities of samples of granite, basalt, peridotite/dunite, and an iron meteorite, which are used as representatives of the various layers of the Earth (crust, mantle, core). The samples are weighed to determine their mass, and the Archimedes Principle is used to determine volume. From these two properties, they calculate density, compare it to accepted values presented in the discussion, and answer questions about their observations.

This lesson provides experience working on a real-life scenario by allowing students the opportunity to use topographic maps to design a hiking trail system based on access from road, range of habitats, and other specified criteria. They will also complete a data sheet and produce an informational brochure.

In this interactive lesson plan, students collaborate to design a Mars base, applying concepts in engineering, architecture, and sustainability. Working in teams, they creatively solve challenges related to life support, resource management, and adapting to Martian conditions. Students draw out detailed floor plans for their innovative designs, showcasing their understanding of STEM principles and presenting their vision for a functional Martian habitat.

Learners will build an open spectrograph to calculate the angle the light is transmitted through a holographic diffraction grating. After finding the desired angles, the students will design their own spectrograph using the information learned. The activity is part of Project Spectra, a science and engineering program for middle-high school students, focusing on how light is used to explore the Solar System.

Students acquire a basic understanding of the science and engineering of space travel as well as a brief history of space exploration. They learn about the scientists and engineers who made space travel possible and briefly examine some famous space missions. Finally, they learn the basics of rocket science (Newton's third law of motion), the main components of rockets and the U.S. space shuttle, and how engineers are involved in creating and launching spacecraft.

In this video from NOVA scienceNOW, learn how scientists detect potential signs of life on distant planets.

Students learn about ultraviolet light in this Moveable Museum unit, where they detect UV rays and then explore ways to block them. The four-page PDF guide includes suggested general background readings for educators, activity notes, step-by-step directions, and information about where to obtain supplies. Students make a bracelet from beads that respond to UV light by changing color, and test it in different light environments.

Determine the dew point temperature for your classroom through a hands-on experiment. Use humidity and temperature probes to investigate the temperature at which it would rain in your classroom! Learn about water density and the conditions necessary to produce fog or rain.

An expert describes the carbon composition of diamonds, as well as the conditions necessary for diamond formation in this video segment from Nature.

This is an activity about creating impacts on sandy surfaces. Learners will use trays of sand and a variety of solid objects to model the effects of "impactors" on the surface. This is activity 6 of 9 in Mars and Earth: Science Learning Activities for After School.

Learners will use trays of sand and cups of water to recreate surface features seen in images of Mars. This is activity 5 of 9 in Mars and Earth: Science Learning Activities for After School.