The Greenhouse Effect - FREE KS3 Biology Worksheet

Find out why Earth stays warm enough for life in this free KS3 Biology worksheet on the greenhouse effect — no preparation needed, just download and use. 🌍 Perfect as a lesson starter, homework task, or quick revision activity for students aged 11-14.

Greenhouse gases such as carbon dioxide and methane slow down heat escaping from Earth to space. Without them the planet would average about −18°C instead of about 15°C.

Three questions, 13 marks in total: a multiple-choice question on how much of the air is carbon dioxide (2 marks); a five-gap fill-in-the-blank with a word bank on the atmosphere and greenhouse gases (5 marks); and a six-mark written question explaining how a gardener's greenhouse keeps plants warm and why Earth needs its own greenhouse effect. A full answer key is included. Comes as a PDF and an editable Word file (DOCX).

🖥️ Full lesson page with the video, quiz and free worksheet: https://inewittall.com/ks3-biology/the-greenhouse-effect/?utm_source=payhip&utm_medium=listing ▶️ Watch the full lesson on YouTube: https://youtu.be/DgtyAFDpnAw

Want more? The full 100-mark premium worksheet goes deeper into how greenhouse gases slow heat escaping to space, what ice cores reveal about carbon dioxide over 800,000 years, and where extra greenhouse gas emissions come from. A complete lesson bundle with the extension pack is also available.

TAGS: greenhouse effect, greenhouse gases, KS3 Biology, KS3 science, climate change, carbon dioxide, atmosphere, global warming, free worksheet, lesson starter, homework, revision, ages 11-14, climate change and living sustainably, free download

PRICE: Free

KEY STAGE: KS3

SUBJECT: Biology

FORMAT: PDF + DOCX (editable Word file)