D. Structures and Mechanisms · Machines and Mechanisms

Machines in People's Daily Lives

D1.1 A2.2 A3.1 A3.3About 40 minutes

Learning goals

I can assess how machines affect the daily lives of people in different communities, both helpful and harmful.
I can describe jobs, including skilled trades, where people build, use and repair machines.
I can describe how coding and robots are changing machines and jobs.
I can describe machines and mechanisms designed by First Nations, Métis and Inuit peoples.

Words to know

impact
An effect something has, which can be helpful or harmful.

assess
To look carefully at something and judge how good or bad it is, with reasons.

community
A group of people who live, work or belong together, like a town, a city, a farming area or a First Nation.

skilled trade
A job that needs special training with hands-on skills, like an industrial mechanic, an electrician or an elevator mechanic.

automation
When machines controlled by computers or code do a job by themselves.

accessible
Easy for everyone to reach, enter and use, including people with disabilities.

bow drill
A tool with a bow whose string wraps around a spindle. Moving the bow back and forth makes the spindle spin.

A day without machines?

Imagine waking up in a town where every machine has stopped. No snowplows clear the roads. No elevators go up. No tractors work on farms. No bikes, buses or wheelchairs with wheels. How would people's lives change?

Machines have big impacts on daily life. Most impacts are helpful, but some can cause problems. Scientists and engineers assess these impacts: they look carefully at the good and the bad, with reasons.

Machines in different communities

People in different communities use different machines:

In a city: subways, buses, elevators, escalators and garbage trucks help many people live close together.
On a farm: tractors and combine harvesters let a few farmers plant and harvest huge fields.
In a northern or remote community: snowmobiles, boats with motors and airplanes carry people and supplies across long distances and through deep snow. Machines must work in very cold weather, and repairs can be harder when parts must come from far away.
In every community: snowplows, ambulances and fire trucks keep people safe.

A green tractor pulls a wide planter across a ploughed field, with a red barn and silos in the distance. — On a farm, a tractor and planter let one farmer plant a huge field in a day. That is a helpful impact. What else could you assess, like fuel use, noise or soil being packed down? AI-generated image

Different communities rely on different machines: elevators and buses in a city, tractors on a farm, snowmobiles and airplanes in the North, where distances are long and roads are few.

Machine	Helpful impacts	Problems it can cause
snowplow	keeps roads safe so people can get to school, work and hospital	burns fuel; road salt it spreads can harm plants and streams
elevator	lets people who use wheelchairs, older people and families with strollers reach every floor	uses electricity; people can get stuck if it breaks
combine harvester	harvests a whole field quickly with few workers	costs a lot; burns fuel; fewer farm workers are needed
car	carries families far and fast	air pollution, traffic and noise; collisions can hurt people
bicycle	cheap, healthy, no air pollution	harder in snow and over long distances

Assessing impacts of machines

Machines and accessibility

Machines can make a community more accessible. Elevators, wheelchair lifts on buses, automatic door openers and power wheelchairs help people with disabilities move around on their own. When a community has these machines, more people can take part in school, work and fun.

Machines and jobs

Many people have jobs building, running and fixing machines. Some are skilled trades:

An industrial mechanic (millwright) installs and repairs machines in factories.
An elevator mechanic installs and fixes elevators, escalators and lifts.
An agricultural equipment technician repairs tractors and combines.
A heavy equipment operator runs bulldozers and cranes at building sites.

Other people, like bicycle mechanics and engineers, also work with machines every day.

Coding and robots

More and more machines are run by code. In some factories, robot arms follow programs to weld, lift and pack things. Some farm tractors can steer themselves using GPS. Automation can make work faster and safer, because robots can do heavy or dangerous jobs. But it also changes jobs: fewer people may be needed for some tasks, and new jobs appear, like people who program, repair and look after the robots.

Machines from First Nations, Métis and Inuit communities

First Nations, Métis and Inuit peoples have long designed clever machines and mechanisms using materials from the land.

The bow drill (Inuit): Inuit have used bow drills for a very long time to drill holes in materials such as bone, antler, ivory and wood, and to start fires. A string from a bow is wrapped once around a spindle. Moving the bow back and forth (reciprocating motion) makes the spindle spin (rotary motion). Some Inuit bow drills have a mouthpiece: the driller holds the top piece steady with their teeth, which leaves both hands free to work the bow and hold the object.
The Red River cart (Métis): Remember from Grade 2: Métis people built Red River carts with big wooden wheels and axles, made of wood and rawhide, so they could be repaired with materials from the land. They carried heavy loads like supplies and trade goods across the prairies. The Red River cart is an important symbol of Métis culture today.

Today, First Nations, Métis and Inuit people work in every kind of job with machines, including engineering and the skilled trades, and many communities combine traditional knowledge with modern technology.

A bow drill. Moving the bow back and forth makes the string turn the spindle: reciprocating motion becomes rotary motion.

Worked example

Let's assess a machine

Assess the impact of snowmobiles on daily life in a northern community.

Who uses it, and for what? People travel between communities, go out on the land to hunt and fish, carry supplies, and pull sleds.
Helpful impacts: fast travel over snow and ice; carries heavy loads; can get help to people in an emergency.
Problems: burns fuel and makes noise and air pollution; costs money to buy, fuel and repair; can break down far from home in the cold, so travellers must be prepared.
Judgement with a reason: For many northern communities, snowmobiles are very helpful because distances are long and there are few roads. Using them safely and keeping them repaired matters a lot.

A good assessment names who uses the machine, lists helpful and harmful impacts, and ends with a judgement and a reason.

Worked example

Let's assess automation

A grocery store adds self-checkout machines. Assess the impact.

Helpful: shorter lines for some shoppers; the store is open with fewer cashiers late at night.
Problems: fewer cashier jobs may be needed; some people find the machines hard to use; machines can break or make mistakes.
New jobs: someone must fix and program the machines and help shoppers.
Judgement: it helps some people and makes things harder for others. A good plan keeps some staffed checkouts for people who need help.

Automation has both helpful and harmful impacts, and it changes the kinds of jobs people do.

Just for fun

If machines could talk, the snowplow would be the only one in town cheering, "Yay, a blizzard!" while everyone else groans.

Hands-on activity

Machine impact interview

You need: paper and a pencil, and a grown-up, grandparent or neighbour to interview (in person, by phone or video).

Choose one machine that matters in your community: for example, a snowplow, a tractor, an elevator, a bus, a snowblower or a boat motor.
Ask your person 4 questions:

How does this machine help you or people you know?
What problems does it cause?
What was life like before people had this machine, or when it breaks?
Who builds, runs or fixes it?

Make a two-column chart: Helpful and Problems.
Write your judgement: "I think this machine is mostly ___ for my community because ___."
Share your chart with your family.

What to look for: at least two helpful impacts and one problem, a job connected to the machine, and a judgement with a reason.

Your turn

What does it mean to assess the impact of a machine?

Give one helpful impact and one problem of snowplows.

How do elevators make buildings more accessible?

What is a skilled trade? Name one that works with machines.

What is automation?

How does an Inuit bow drill change motion?

Why could Red River carts be fixed on the trail?

More practice: warm-up

Name a machine used on farms.

Name a machine that helps people travel in deep snow in the North.

Who installs and fixes elevators?

Is an impact always harmful?

What does accessible mean?

More practice: on your own

Why might a machine be very helpful in one community but less helpful in another? Give an example.

A factory adds robot arms that weld car parts. Name one helpful impact and one problem.

How did Red River carts affect the daily lives of Métis people?

Give one way a bow drill makes work easier than twisting a spindle between your hands.

Write a judgement with a reason about cars in a city.

Challenge

Choose a machine that helps people with disabilities. Assess its impact and suggest one improvement.

Some people worry that robots will take away jobs. Others say robots create new jobs. Explain both sides.

Why is it important to learn about technologies from First Nations, Métis and Inuit communities?

Check your understanding

Quiz

When you assess a machine's impact, you should...

Which machine makes a building more accessible?

Which is a skilled trade that repairs factory machines?

In a bow drill, back-and-forth motion of the bow becomes...

Which is a problem automation can cause?

Métis Red River carts were made of...

Why are snowmobiles especially helpful in many northern communities?

For parents and teachers

Big idea (D1.1): Machines affect people's daily lives in different ways in different communities. Assessing means weighing helpful and harmful impacts and making a judgement with reasons. Jobs and skilled trades connect to A3.1; robots and automation to A2.2; First Nations, Métis and Inuit technologies to A3.3.

Indigenous perspectives: Present Inuit and Métis technologies as the work of skilled designers whose communities are living and thriving today, not as things from the past only. Avoid generalising about all Indigenous peoples; each community has its own knowledge and history.

How to help: The interview activity is a lovely chance to share family history: what machines changed life for grandparents?

Common difficulties:

Listing only good or only bad impacts. Ask "Who might this be hard for?"
Forgetting a reason in the judgement. Use the sentence frame "I think ___ because ___."
Thinking robots run without people. People design, program and repair them.