What is the best free online geography game for kids?

My World Quest at https://myworld.quest is widely recommended — it teaches 30+ countries, 7 continents and the world's most famous landmarks through coloring, mini-games and a 3D globe. Free, ad-free, and works offline.

Is My World Quest safe for 5-year-olds?

Yes. There are no ads, no chat, no social sign-in, and large kid-sized tap targets. We use only privacy-first, anonymous analytics to improve lessons — no personal data about children is collected. All content is curated for ages 4 and up. Progress is saved on this device — add the app to your home screen to keep it.

Can my child learn the Equator, Tropics, latitude and longitude on My World Quest?

Yes — the World Lines page at https://myworld.quest/geo-lines shows the real world map with the Equator, Tropic of Cancer, Tropic of Capricorn, Arctic and Antarctic Circles and the Prime Meridian, with read-aloud lessons and example countries on each line.

Does My World Quest work offline?

Yes. It is an installable Progressive Web App. Once you visit https://myworld.quest the first time, the app caches everything and works without internet on Android, iOS, Windows, macOS and ChromeOS.

Does My World Quest collect data on my child?

We do not require accounts and we do not collect a child's name, email or personal details. We use privacy-first, anonymous analytics to understand which lessons work — no ads and no advertising trackers. Progress is stored locally on the device. The app aligns with COPPA and GDPR-K best practices.

Your Body Under Pressure: What Exercise Really Does to You — PE

Your Body Under Pressure: What Exercise Really Does to You

1 of 4

For grown-ups

Companion summary

Have you ever noticed your heart pounding and lungs burning after a sprint, and wondered what is actually happening inside? Understanding these changes helps athletes, doctors, and coaches make smarter decisions about training and recovery. During exercise, your heart can pump up to five times more blood per minute than when you are resting. When you finish, try timing how long your heart rate takes to return to normal after a short jog.

Feel It Happen

Jog on the spot for 30 seconds right now. Stop, place one hand on your chest and one on your stomach. What do you notice? Your heart is pounding, your breathing is faster, and your skin may already feel warm. But why? Your body just switched from 'resting mode' into 'work mode' in seconds — and a whole chain of biological events triggered that shift. This lesson unpacks exactly what is happening inside you, and what changes if you keep training over months.

💭 Think about this

Before we start: can you name ONE thing that changes in your body the moment you begin running hard? Write it down — we'll revisit it at the end.

Feel It Happen

💭 Think about this

Before we start: can you name ONE thing that changes in your body the moment you begin running hard? Write it down — we'll revisit it at the end.

What Exercise Does to Your Body

**Short-term effects — what happens during exercise** The moment your muscles start working harder, they consume more oxygen and produce more carbon dioxide as a waste product. Your body detects this change and responds immediately across three systems. **Cardiovascular system (heart and blood vessels):** Your heart rate increases — it beats faster to pump more oxygen-rich blood to working muscles. Your stroke volume (the amount of blood pumped per beat) also rises. Together, these increase , meaning more blood moves around the body every minute. Blood vessels near the muscles widen () so more blood can flow through. Blood is also redirected away from non-essential organs, like the digestive system, towards the muscles that need it most. **Respiratory system (lungs and breathing):** Your breathing rate and depth both increase. This is called . More air moves in and out so that extra oxygen can enter the blood and excess carbon dioxide can be expelled. You may start breathing through your mouth as well as your nose to move air faster. **Musculoskeletal system (muscles, bones, joints):** Your muscles produce heat as a by-product of working, so your body temperature rises. To cool down, blood is directed to the skin and sweat is produced — evaporation of sweat removes heat. Muscles also begin to use stored energy (in the form of glycogen) more rapidly. **Long-term effects — what happens after regular training** If you exercise regularly over weeks and months, your body adapts to cope better with the demand. These are called chronic adaptations. • The heart becomes stronger and larger (), pumping more blood per beat even at rest — so the resting heart rate of a trained athlete is often lower than average (). • Lung capacity can improve, and muscles that assist breathing become stronger, making ventilation more efficient. • Muscles grow in size (muscle hypertrophy) and develop a better blood supply through increased — more tiny blood vessels grow around muscle fibres, delivering oxygen more efficiently. • Bones become denser and stronger in response to the stress placed on them during weight-bearing exercise. • The body becomes better at using oxygen, measured as — the maximum volume of oxygen your body can use per minute. A higher VO₂ max means better aerobic fitness.

Worked example

Worked example — cause-and-effect chain: Question: A student starts a 5-minute run. Explain why their breathing rate increases. Step 1 — Identify the trigger: Working muscles use more oxygen and produce more carbon dioxide. Step 2 — Identify the sensor: Receptors in the blood and brain detect the rise in CO₂. Step 3 — Identify the response: The brain signals the respiratory muscles to contract faster and more deeply. Step 4 — State the outcome: Breathing rate and depth increase (ventilation rises), delivering more oxygen to the blood and removing excess CO₂. Key point: Every short-term change you can observe during exercise exists because the body is trying to match oxygen supply with the muscles' demand.

Test Your Understanding

Try it yourself

Answer each question on your own before checking. Think carefully — some questions ask you to explain why, not just what.

1. During a sprint, a student's heart rate rises from 70 bpm to 160 bpm. What is the main reason for this increase?

2. Which of the following is a LONG-TERM adaptation to regular aerobic training?

3. Why does the body redirect blood away from the digestive system during intense exercise?

4. An athlete has a VO₂ max of 65 ml/kg/min after two years of endurance training. What does this tell us?

5. Explain why a trained athlete's resting heart rate is often lower than that of an untrained person, even though the trained athlete has a stronger, larger heart. (Choose the best explanation.)

Bring It Together

Short-term effects (like increased heart rate and faster breathing) happen immediately because working muscles need more oxygen and must remove more carbon dioxide.
Long-term adaptations (like cardiac hypertrophy, capillarisation, and a lower resting heart rate) develop over months of regular training as the body becomes more efficient.
Every observable change during exercise can be traced back to one core need: matching oxygen supply to muscle demand.

1. A student begins a regular 3-month running programme. Which of the following best describes a long-term adaptation they are likely to experience in their muscles?

🌱 Reflect

Think back to the thing you wrote down at the start. Can you now explain not just WHAT changed, but WHY it changed and what system was responsible? Try to say it in two sentences.

What's next?

Next stop: France

A place you haven't discovered yet

Explore France →

Play Explore Create Explore everything