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Liquids are everywhere, but at the same time, they possess some incredibly unique qualities when compared to the rest of the matter in the universe. In this episode of Crash Course Chemistry, Hank gives you information on things like London dispersion forces, hydrogen bonds, cohesion, adhesion, viscosity, capillary action, surface tension, and why liquids are just weird.

Ready, set, soar! Soar high in the clouds with a sleepy condor who wants to help you learn in this interactive lesson about the water cycle, how it works, and how clouds are formed. In this lesson, students will learn to find and describe the connections between scientific concepts.

In this lesson, students explore the particle nature of matter by first dissolving salt in water, then allowing the water to evaporate, and finally observing the solid salt left behind. After viewing a model of salt, students help develop models for the processes of salt dissolving, water evaporating to form a gas, and salt re-forming as a crystal. The focus is that matter, whether solid, liquid, or gas, is made up of particles; that dissolving and evaporation happen at the particle level; and that models can help explain these processes that we cannot see.

Activate Creature Powers! Inspired by the WILD KRATTS, in this activity children will be challenged to create PBS KIDS ScratchJr projects that explore different animals and their unique behaviors and traits.

Children will learn how to create projects, add characters, and how to use the programming blocks to make their characters animate and move on the screen. They will explore coding and computational thinking practices as they utilize technology as a tool for creativity, expression, and learning with the PBS KIDS ScratchJr app.

Hank takes today's Crash Course video to discuss some confusing ideas about hydrocarbon derivatives but then makes it all make more sense. He discusses alcohols, hydroxyl groups, aldehydes, carboxylic acid, acetones, amines, and ethers and esters.

Magnetism is a force that causes objects to attract or repel each other. An object's magnetic force is how strong that attraction is. Magnetic fields are the areas where the magnetic force will work. Magnets also have opposite poles, negative and positive. Remember, opposites attract!

The classroom resource provides a slide show that will introduce magnets, magnetic fields, and magnetic forces. This resource can provide background information for students before they create their own models and conduct their own investigations. There is also a short test that can be used to assess students' understanding.

In this lesson, students will look closely at the parts of a thermometer. After placing a thermometer in hot and cold water, students will look at molecular model animations of the liquid in a thermometer. Students will then draw a model of the molecules of a thermometer after it has been placed in hot and then cold water.

Steve Trash teaches kids about science with fun and magic. The show is filmed in Alabama.

Steve explores the variety of biomes that exist on the planet Earth. Each biome is a community of plants and animals that have common characteristics for the environment in which they exist. Then, Steve teaches us how to make less waste and pollution through the magic words – Reduce, Reuse and Recycle.

In the first half of the video, students will learn about the different biomes on Earth and how the resources available in each biome support living things. In the second half of the video, Steve Trash will explain how we can decrease the waste and pollution we produce by reducing, reusing, and recycling.

Steve Trash teaches kids about science with fun and magic. The show is filmed in Alabama.

You find water in oceans, rivers, lakes and ponds, in clouds and rain and snow. Explore how all of these are connected through a continuous cycle in the natural world. Then, Steve suggests ways to prevent litter and other destructive types of pollution. After all, it's no fun to play in the water if its full of garbage.

This guide was developed to support teachers in teaching topics with real-world context and provide them with the background to feel competent and comfortable when teaching about the ocean. It provides a solid introduction to the ocean and the ocean literacy principles in an accessible and reader-friendly manner. In addition to general information about the ocean, the guide includes numerous education features, such as teaching tips and student thinking, that help to connect the content to classroom practice.

Plants produce seeds in order to reproduce. Gymnosperm seeds develop in cones, and angiosperm seeds develop in fruit. When a seed is fertilized, in the right conditions, it will germinate, starting the life of a new plant!

The classroom resource provides a video that will describe the process of reproduction in plants with seeds. After utilizing this resource, the students can complete the short test to assess their understanding.

Players are challenged to investigate a city neighborhood and explore relationships among living and non-living things in this interactive game from PLUM LANDING. Plum provides short prompts that encourage students to find animals and plants, consider how they meet their needs in a city environment, and discover connections among living and non-living things.

In this lesson, students will make a 2-D model of a salt crystal and use water molecule cut-outs to show how water dissolves salt. After seeing an animation of water dissolving salt, students will compare how well water and alcohol dissolve the salt. They will relate their observations to the structure of salt, water, and alcohol on the molecular level.

Students will be able to explain, on the molecular level, why water can dissolve the salt. Students will be able to identify the variables in their experiment. Students will also be able to explain why a less polar liquid, such as alcohol, is not good at dissolving salt.

Students build a stronger understanding of how the human body is organized and interacts with microbes through a series of articles and videos and by creating a human body microbial map. Then they create a public service announcement on a specific microbe.

A wave is energy in motion or energy moving from point to point. To describe the traits of a wave, there are a few terms you need to know.

Students will choose a term in the activity to display its description in the diagram.

Enjoy this colorful self-paced lesson to practice leveled reading. Use question words like “Who? What? When? Where? Why? & How?” Watch a real hot air balloon launch and meet a crazy ostrich who knows she can run but thinks she can fly. Students learn about how matter, mass, volume, and weight are connected to air. 

This lesson begins with a story about rescuing reptile eggs from a new construction site. Using the story as motivation, students are presented with an engineering design challenge: Build a portable device that can warm, support, and protect one reptile egg as it is moved from a construction site to a nearby reptile conservation center. After observing different heat packs, students discuss the criteria and constraints related to designing a heat pack as the basis for their device. Students investigate calcium chloride as an exothermic dissolver and then move on to calcium chloride and baking soda as the exothermic chemical reaction which will serve as the heat source for their device.

Students adjust the amounts of the reactants (water, calcium chloride, and baking soda) to achieve the right temperature range and then test a prototype in a sealed zip-closing plastic bag. Students use their findings and ideas about insulation and heat transfer to draw an optimized design that 1) Keeps an egg at the ideal temperature, 2) Holds an egg in the proper orientation, and 3) Protects the egg from impact. Each student or student group draws this device and explains how the device meets each of the three criteria.

In this activity, students brainstorm how people living along coasts harm ocean animals and plants. Then they analyze specific examples.

Observe how objects in a dark space can only be seen when light enters the space in this interactive game from PEEP and the Big Wide World. The interactive game offers opportunities for students to find objects in a very dark space by shining a beam of light around the area.

Support materials include: Background Reading, Teaching Tips, and Discussion Questions. This resource was developed through WGBH’s Bringing the Universe to America’s Classrooms project, in collaboration with NASA.

In this Martha Speaks interactive story, students explore the benefits of sorting waste in order to help the environment. Students learn about how recycling and composting work. When used as a part of Martha’s True Stories Buddies Program, buddy pairs engage with the interactive story, then talk and write as they create their own Earth Pledge about how they will help protect the earth. To familiarize yourself with the program, begin by reading the Martha's True Stories Buddies Program: Overview.