![Space junk](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/space-junk-orbiting-earth.jpg?itok=nA6-Kgmi)
Space Junk
STEM Explained
Litter isn't just a problem on Earth. When litter ends up in space, it can cause collisions and other consequences for satellites, the International Space Station and even for people on Earth!
![Replica of the earliest wooden model stethoscope](/sites/default/files/styles/resource_card_image_360x300_/public/2020-02/stethoscope_replica_ingenium.jpg?itok=RgHTg8L2)
Stethoscope Replica
Interactives
Using stethoscopes, doctors can use sound waves to detect various health issues. Learn how this device has evolved since it was invented in 1816!
![A column supporting the roof the Parthenon in Greece](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/Column_Parthenon.jpg?itok=WiYZb4Kk)
Strong Shapes: Cylinders
Lessons
Students develop and apply comparing & contrasting, observing and predicting skills as they explore the strength of cylinders made with different materials.
![Roller Coaster Roller Coaster](/sites/default/files/styles/resource_card_image_360x300_/public/photo-1454520910860-c95bba7de5a2.jpg?itok=9wC1kwyB)
Simple Machines: Inclined Planes
Picture Collections
5 images of examples where inclined planes are used to help lift or move objects such as ramps for accessibility or entertainment
![Seesaw [Class 1 Lever] Seesaw [Class 1 Lever]](/sites/default/files/styles/resource_card_image_360x300_/public/seesaw.jpg?itok=pRWoCsg2)
Simple Machines: Levers
Picture Collections
6 images of some objects such as tweezers, scissors and wheel barrows that use the lever principle to create movement for a specific purpose
![Tug-of-War game](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/Tug-of-war_game.jpg?itok=DOLAU3v8)
Push and Pull
Lessons
Students develop and apply Observing, Comparing & Contrasting and Sorting & Classifying skills as they explore the forces of push and pull acting on everyday objects.
![Radiation shielding garment on the International Space Station](/sites/default/files/styles/resource_card_image_360x300_/public/2020-02/ISS_radiation_shield_garment.jpg?itok=iWfQ6aCb)
Radiation and Human Space Exploration
STEM Explained
One of the greatest hazards that humans in space face is cosmic radiation. Learn what cosmic radiation is, why it's dangerous, and ways that we are looking at protecting humans in deep space.
![Water: A Natural Reflector Water: A Natural Reflector](/sites/default/files/styles/resource_card_image_360x300_/public/PM_Water_Reflector.jpg?itok=0C01YEYB)
Reflectors
Picture Collections
7 images of some objects that can reflect light such as mirrors, Mylar balloons and water
![Children’s play mat with pictures of a road and landmarks](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/Children%E2%80%99s_play_mat.png?itok=_oWMl0jp)
Rosie's Walk
Lessons
Students develop and apply communicating, sequencing and spatial reasoning skills as they create and navigate a maze to get Rosie the Hen safely home for lunch.
![An artist’s impression of a habitable exoplanet orbiting a red dwarf star](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/Proxima_b_habit.jpg?itok=_7NKdCTU)
Searching for exoplanets around the star next door
STEM Explained
In planetary science, astronomers have found planets that orbit other stars, just like Earth orbits the Sun. Some of them might even be able to support life.
![Bacteria can be used to generate electricity](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/Microbial_fuel_cell_icon_1.jpg?itok=tkWwcU0G)
Microbial Fuel Cells
STEM Explained
In a few decades, some of the electricity you use might be generated by bacteria.
![Inside the Destiny Laboratory Module on board the International Space Station](/sites/default/files/styles/resource_card_image_360x300_/public/2019-12/Destiny_Module_Sound.jpg?itok=A-lv_XQ9)
Noise on Earth and on the International Space Station
Backgrounders
This backgrounder explains what noise is, how it is measured, and how it affects our hearing, wellness and more.
![Tennis Balls Tennis Balls](/sites/default/files/styles/resource_card_image_360x300_/public/PM_Tennis_Balls.jpg?itok=rGSq-yLm)
Bouncing Objects
Picture Collections
10 images of some spherical objects such as golf balls and tennis balls that are made of different materials and used for specific purposes
![is-it-possible-to-change-water-into-cola](/sites/default/files/2019-08/is-it-possible-to-change-water-into-cola.jpg)
Is it possible to change water into cola?
Hands-on Activities
Explore the concept of displacement of fluids in this hands on activity.
![A man powers a drone with a remote control. Image © Bestgreenscreen, iStockphoto.com](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/A%20man%20powers%20a%20drone%20with%20a%20remote%20control.jpg?itok=zRupYrjb)
It's a Bird, It's a Plane, It's... a Drone!
STEM Explained
Drones are very cool and very useful aircraft! This resource explains how drones stay in flight, and outlines some of their uses.