![compass pointing north](/sites/default/files/2020-04/compass-pointing-to-north.jpg)
How can I tell which way is north at night?
Hands-on Activities
Do you like to look at the stars? What can you identify in the night sky? Try finding some important constellations tonight!
![Goldfish Goldfish](/sites/default/files/styles/resource_card_image_360x300_/public/Gullfiskur.jpg?itok=L6czSzoc)
Fish: Freshwater
Picture Collections
4 images of some fish such as koi that live in freshwater river and lake environments and in freshwater aquariums and garden ponds
![Clown Fish Clown Fish](/sites/default/files/styles/resource_card_image_360x300_/public/Clown_fish_in_the_Andaman_Coral_Reef.jpg?itok=nkTzBh1T)
Fish: Saltwater
Picture Collections
14 images of some fish such as lion fish, grouper and sharks that live in saltwater environments like oceans, saltwater lakes and aquariums
![How can I make a volcano?](/sites/default/files/2019-08/how-can-i-make-a-volcano.jpg)
How can I make a volcano?
Hands-on Activities
Create a model of an erupting volcano and learn about the structures of a stratovolcano in this hands-on activity.
![Measuring Slope Of Soil Measuring Slope Of Soil](/sites/default/files/styles/resource_card_image_360x300_/public/NRCSIA99345_-_Iowa_%283383%29%28NRCS_Photo_Gallery%29.jpg?itok=wI4lPIbO)
Careers: Soil Scientist
Picture Collections
5 images some work that a scientist who studies the Earth's soil might do such as classifying types of soil and measuring the slope of soil
![Cartoon aircraft in flight](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/Aircraft_in_flight.jpg?itok=MlDYQ0_o)
Cosmic Radiation and Aviation
Backgrounders
Learn how people came to understand the source of cosmic radiation, as well as how this radiation impacts those who work in and travel on airplanes.
![Wooden sieves](/sites/default/files/styles/resource_card_image_360x300_/public/2019-11/Wooden_sieves.jpg?itok=mkRg_oJ6)
Design & Build a Soil Sifter
Lessons
Students will work collaboratively to design and build a sifter that separates soil according to particle size.
![Massive algal bloom](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/massive-algal-bloom.jpg?itok=pqgXB2yc)
Eutrophication: Why you should care about pond scum
STEM Explained
When fertilizers from agriculture get into lakes and rivers, big problems can result for aquatic ecosystems, food chains & webs!
![Measuring Changes To A Glacier Measuring Changes To A Glacier](/sites/default/files/styles/resource_card_image_360x300_/public/Scientists_measuring_the_terminus_of_Grinnell_Glacier_%284428358942%29.jpg?itok=n0YBXgJE)
Careers: Climatologist
Picture Collections
5 images of some work related to the scientific study of climate such as using instruments to measure changes in climates
![Feeding The Cows Feeding The Cows](/sites/default/files/styles/resource_card_image_360x300_/public/feeding.jpg?itok=vwI4pH4k)
Careers: Farmer
Picture Collections
5 images of some work that farmers do such as feeding cows, planting fields and harvesting grain
![Repotting](/sites/default/files/styles/resource_card_image_360x300_/public/repotting.jpg?itok=Ym70QlCE)
Careers: Horticulturalist
Picture Collections
5 images of some work that horticulturalists might do such as cultivating and caring for plants in various environments
![Landscaper Planting Landscaper Planting](/sites/default/files/styles/resource_card_image_360x300_/public/Landscaper-Planting-%5BSmall-Beds%5D.jpg?itok=pVHEjdIK)
Careers: Landscaper
Picture Collections
5 images of some work that landscapers might do such as planning, planting and maintaining gardens
![Reporting The Weather Reporting The Weather](/sites/default/files/styles/resource_card_image_360x300_/public/Meteorologist-Reporting-Weather.jpg?itok=dOl3KpeK)
Careers: Meteorologist
Picture Collections
4 images of some work that a meteorologist might do such as forecasting the weather and analyzing clouds
![Cranes Cranes](/sites/default/files/styles/resource_card_image_360x300_/public/Birds-216827_640.jpg?itok=GZCF5Cns)
Animals: Migration
Picture Collections
10 images of some animals such as salmon, Monarch butterflies, whales, zebras and wildebeast that move seasonally from one region to another
![Close-up of an amethyst geode](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/geode_close-up.jpg?itok=e0eo8bjg)
What is a Crystal?
STEM Explained
Learn what makes a crystal a crystal.