Environmental Science
How ecosystems work and how humans affect them — energy flow, pollution, and climate change.
Ms. Freya Nguyen
Environmental Science Teacher
Ecosystems & Energy Flow
How energy moves through living things.
Human Impact & Acid Rain
How pollution changes the environment.
Biodiversity & Ecosystem Services
Why variety keeps ecosystems working.
The Carbon Cycle & Climate Change
How carbon moves — and why the balance matters.
Common questions
Who is "Environmental Science" for?
It is written for learners at High School level (Grades 9–12), and for anyone older who wants a clear refresher on science. How ecosystems work and how humans affect them — energy flow, pollution, and climate change. There is no application or entry test — you can start the first lesson straight away.
How long does the course take?
There are 4 lessons totalling 34 minutes of reading and quizzes, laid out over 2 units. You can move at your own pace — progress is saved as you go.
What do I need to know before starting?
No prior coursework is assumed. The course opens with "Ecosystems & Energy", covering food chains and trophic levels, so the foundations are built in rather than expected.
Is the course free?
Yes. Every course on Monster Class is completely free, with no credit card, trial period or paywall. Creating a free account simply saves your progress, XP and place on the leaderboard across devices.