E. Earth and Space Science: Space Exploration · Space Exploration: The Sun, the Solar System and the UniverseSpace Technology on Earth: Innovations and Sustainability
E1.3 A2.1 A2.2 A1.3About 70 minutes
Learning goals- I can describe technologies developed for space that are used in other fields, such as medicine, communication and agriculture.
- I can assess how space technologies contribute to sustainable practices on Earth.
- I can explain how GPS finds a location.
- I can tell the difference between real space spinoffs and common myths.
- I can describe STEM careers, including skilled trades, connected to space technology.
Words to know
spinoff
A product or technology originally developed for one purpose (such as space exploration) that is later used for another.
innovation
A new idea, method or device, or a new use of an existing one.
sustainability
Meeting today's needs without harming the ability of future generations to meet theirs.
precision agriculture
Farming that uses GPS, sensors and satellite data to apply water, fertilizer and pesticides only where and when they are needed.
trilateration
Finding a position by measuring distances from three or more known points.
telemedicine
Providing health care from a distance using communication technology.
Remember from Grade 6
In Grade 6 you learned that Canada is known for space robotics, including the Canadarm (first used in 1981), and that many people, from engineers to skilled trades workers, build space technology. Now you will follow space technology back to Earth and assess how it is used in medicine, communication, farming and sustainability.
A question to start
The phone in your pocket has a camera, a GPS receiver and weather apps. Which of those has a connection to space exploration? (Spoiler: all three.)
From space problems to Earth solutions
Space is a harsh place: no air, extreme temperatures, radiation, and no repair shop. Engineers must make technology that is light, small, reliable and efficient. Those same qualities are useful on Earth.
Robotics and medicine (Canada). The Canadarm, Canadarm2 (installed on the International Space Station in 2001) and the Dextre robot were built in Canada. Engineers from the company that built them worked with surgeons at the University of Calgary, led by Dr. Garnette Sutherland, to create neuroArm, a robot that can work inside an MRI scanner. It was first used in surgery on a patient in 2008.
Cameras. In the 1990s, a team at NASA's Jet Propulsion Laboratory developed a small, low-power CMOS image sensor for spacecraft. That type of sensor is now in most phone cameras and webcams.
Health monitoring. Astronauts' health must be checked far from any hospital. Canada's Bio-Monitor smart shirt, tested on the ISS, records heart rate, breathing and more. Remote health monitoring and telemedicine also help people in remote and northern communities on Earth.
Comfort and safety. Memory foam was developed under a NASA contract in the 1960s to improve aircraft seat cushioning. Ear thermometers that read infrared light grew out of infrared sensing technology developed for astronomy.
Water. On the ISS, the water recovery system recycles about 98% of the crew's water, including from sweat, breath moisture and urine. Ideas from water recycling and purification for spaceflight have been adapted for water treatment on Earth.
Space technology and sustainability
- Solar power: satellites needed long-lasting power. Vanguard 1 (1958) was one of the first satellites to use solar cells, and space programs pushed solar cell development. Today, solar panels are a key renewable energy source (Lesson 3).
- Precision agriculture: GPS-guided tractors and satellite images of crop health let farmers in the Prairies and Ontario apply fertilizer, water and pesticides only where needed. This saves money and reduces runoff into rivers and lakes.
- Forests and fisheries: satellites help monitor deforestation and track fishing vessels, which helps fight illegal fishing.
- Energy efficiency: lightweight insulation and efficient electronics designed for spacecraft influence buildings and devices.
- Monitoring the environment: as you saw in the last lesson, satellites track climate change, air pollution, and disasters, giving decision-makers the data they need.
How GPS finds you
GPS (the Global Positioning System, run by the United States) and similar systems have dozens of satellites, each sending a signal with the exact time it was sent (from very precise atomic clocks).
- Your receiver measures how long each signal took to arrive.
- distance = speed of light × time. So each signal tells you your distance from one satellite.
- Being a certain distance from one satellite puts you somewhere on a big sphere (a circle, in a flat drawing). Distances from several satellites overlap at only one point: your location. This is trilateration.
GPS needs at least four satellites in three dimensions, partly to correct the small error in your receiver's clock. Signals travel so fast that a timing error of just one millionth of a second would put you about 300 m off!
Myth-busting: not everything came from space
Some famous 'space inventions' are myths. Velcro was invented in the 1940s and 1950s by Swiss engineer George de Mestral, inspired by burrs stuck to his dog's fur; astronauts used it, but space programs did not invent it. Tang drink powder was made by a food company in 1957, before astronauts took it to space. Good scientific literacy means checking sources, even for fun facts.
AI and the future of space technology (A2.2)
Spacecraft increasingly use artificial intelligence. NASA's Perseverance rover uses self-driving software to plan safe paths across Mars, because radio signals take minutes to arrive. On Earth, AI helps analyze satellite images for wildfires, crop health and sea ice. The same tools raise questions: Who checks the AI's decisions? Who owns the data? Can everyone benefit?
Careers connected to space technology (A2.1)
Space technology needs many kinds of workers: robotics technicians, electronics technologists, machinists and welders (skilled trades), software developers, data analysts and GIS (mapping) specialists, aerospace engineers, physicians who study space medicine, and environmental scientists who use satellite data. Many of these careers are found in Canadian companies and agencies, including the Canadian Space Agency near Montréal.
Worked exampleExample 1: Assessing a spinoff
Assess precision agriculture as a contribution to sustainability. Give benefits, drawbacks and a conclusion.
- Benefits: less fertilizer and pesticide used → lower costs and less runoff into waterways; fuel saved by efficient tractor paths; better crop yields on the same land.
- Drawbacks: equipment and data services are expensive, which can be hard for small farms; it depends on reliable satellite signals and internet in rural areas.
- Conclusion: use evidence from both sides.
Precision agriculture makes a real contribution to sustainable farming by reducing chemical use and runoff, but its high cost and need for connectivity mean not all farmers can use it yet.
Worked exampleExample 2: GPS timing
A GPS signal takes 0.070 s to reach your phone. How far away is the satellite? (speed of light ≈ 300 000 km/s)
- distance = speed × time
- = 300 000 km/s × 0.070 s
- = 21 000 km
About 21 000 km, which fits the height of GPS satellites (about 20 000 km).
Hands-on activityPrototype challenge: a space-station-inspired water filter
Astronauts recycle almost all their water. Engineers, water treatment operators and plumbers (a skilled trade) all work on clean water systems. Your task: design, build and test a filter that makes muddy water clearer.
You need: a clear plastic bottle with the bottom cut off (or a funnel), a coffee filter or cotton cloth, clean sand, small gravel, activated charcoal (from a pet store, optional), a jar, muddy water (soil + water), and a timer.
Grown-up note: an adult should cut the bottle. Do not drink the filtered water. A home filter does not remove germs or chemicals.
- Define the problem and criteria: clearest water, in the shortest time, using the fewest materials.
- Design: sketch your layers (for example cloth, then charcoal, sand, gravel from bottom to top) and predict their jobs.
- Build the filter upside-down in the bottle, over the jar.
- Test: pour 250 mL of muddy water through. Time it, and compare the clarity with the original (hold both in front of a page of text: can you read through them?).
- Improve: change one layer and test again.
- Reflect: what would a real space or city water system need that yours does not have?
What to look for: layered filters usually make the water much clearer; finer layers make it clearer but slower (a trade-off). Real systems also disinfect water (for example with UV light or chemicals) and test it carefully, which is why the home version must never be drunk.
Just for funMyth: astronauts invented Velcro. Truth: a Swiss engineer got the idea from burrs stuck to his dog after a walk. So the real inventor of Velcro was a very fuzzy dog.
Your turn
1What is a spinoff? Give one example from space technology.
A technology developed for one purpose and later used for another. Examples: CMOS camera sensors in phones, neuroArm from Canadarm robotics, memory foam, infrared ear thermometers, improved solar cells.
2How is neuroArm connected to Canada's space program?
It was developed by University of Calgary surgeons working with engineers from the company that built the Canadarm, using space robotics know-how.
3Explain how GPS uses timing to find your position.
Satellites send signals with the exact time; your receiver measures each signal's travel time, calculates distance (speed of light × time) from several satellites, and finds the one point that fits all distances (trilateration).
4Give two ways space technology supports sustainability.
Any two: solar cells; precision agriculture (less fertilizer, less runoff); monitoring forests, fisheries and climate; efficient insulation and electronics; water recycling ideas.
5Is Velcro a NASA invention? Explain.
No. It was invented by Swiss engineer George de Mestral in the 1940s–50s. Astronauts used it, but space programs did not invent it.
6Name two careers, including one skilled trade, connected to space technology.
Examples: machinist, welder, electronics technologist (trades/technical); aerospace engineer, software developer, data analyst, GIS specialist.
7Why must you not drink water from your home-made filter?
It may still contain germs and chemicals; it has not been disinfected or tested.
More practice: warm-up
1In what year was the Canadarm first used in space?
2What kind of camera sensor in phones was developed for spacecraft?
3About what percentage of water does the ISS recycle?
5What does precision agriculture use to apply fertilizer only where needed?
GPS, sensors and satellite data.
More practice: on your own
1Why do space technologies often make good Earth technologies?
Space requires technology that is light, small, reliable and energy-efficient, qualities that are also valuable on Earth (in phones, hospitals, homes).
2How can telemedicine help people in remote northern communities?
Patients can be monitored and assessed by doctors far away, reducing long, costly trips and getting care faster.
3A GPS signal takes 0.068 s to arrive. How far is the satellite?
300 000 × 0.068 = 20 400 km.
4Why do GPS receivers need at least four satellites?
Three distances fix a position in 3-D only if your clock is perfect; the fourth satellite lets the receiver correct its own clock error.
5Assess one drawback of relying heavily on GPS.
Examples: signals can be blocked (tunnels, tall buildings) or disrupted by space weather or jamming; people may lose navigation skills; systems are controlled by a few countries.
Challenge
1If a GPS receiver's clock were off by 0.000 001 s (one microsecond), how far off would the distance to a satellite be?
300 000 km/s × 0.000 001 s = 0.3 km = 300 m. This is why GPS satellites carry extremely precise atomic clocks.
2Choose one space spinoff and evaluate whether its benefits to society outweigh its costs. Use at least two pieces of evidence.
Sample (CMOS sensors): benefits: cheap, low-power cameras in phones, medical devices (like small cameras for examinations), and science; they changed communication worldwide. Costs: the original research was paid for with public money; cameras everywhere raise privacy concerns. Conclusion: benefits are large, but privacy rules matter. (Any spinoff with evidence on both sides is acceptable.)
3Design a short research question that a GIS specialist might use satellite data to answer in your community, and explain how it supports sustainability.
Example: 'How has the area of tree cover in our city changed over the last 20 years?' Satellite images over time show tree loss or gain; the city can then plan tree planting to reduce heat, absorb stormwater and support wildlife.
Quiz
1. Which technology was developed for space and is now in most phone cameras?
2. neuroArm, a surgical robot, grew out of experience with:
3. How does precision agriculture support sustainability?
4. GPS calculates distance to a satellite from:
6. Which is a skilled trade connected to building spacecraft?
Big idea: E1.3 asks students to assess ways technological innovations related to space observation and exploration are applied in various fields, including their contributions to sustainable practices on Earth. The water filter is a prototype task connected to STEM occupations (A2.1, A1.3), and the AI and GPS discussions support A2.2.
Common difficulties:
- Believing every cool gadget came from space. Model checking sources (Velcro, Tang myths).
- Describing instead of assessing. Assessment needs benefits, drawbacks and a conclusion.
- GPS 'tracking you'. GPS satellites only send signals; your device calculates its own position.
Safety: an adult should cut the bottle; never drink the filtered water.
How to help: pick one item in your home (phone, thermometer, mattress, solar garden light) and research together whether it really has a space connection, using reliable sources such as NASA Spinoff or the Canadian Space Agency.