Climate change evidence and climate records are the focus of this Grade 7 science worksheet, which asks students to investigate how scientists identify past climate patterns, interpret recent environmental observations, and assess claims about sustainable practices. Rather than treating a single observation as proof, students examine why different sources of evidence and the length of a record matter when explaining climate change.

How scientists investigate climate across time

The reading passage distinguishes weather, which can change from hour to hour, from climate patterns that emerge over many years. Students explore physical records such as tree rings, lake sediments, ice cores, and thermometer records, considering how each can provide clues about earlier conditions. They also examine the limits of individual records and why researchers compare evidence from multiple sources.

Recent observations add another perspective. Temperature, rainfall, snow cover, and the dates when plants flower can reveal changes happening now, although a short record may not show a long-term pattern. The worksheet also addresses local knowledge shared by people who have observed environmental changes over many years, emphasising permission, attribution, and respect for the source.

From climate evidence to informed decisions

Students connect climate records to human influence by examining how burning coal, oil, and gas adds greenhouse gases to the atmosphere and how these gases trap heat. They then apply evidence-based reasoning to a proposed sustainable practice, such as planting trees. Instead of assuming a practice is effective because it has a positive label, learners consider what should be measured, where measurements should be taken, and how long evidence should be collected.

The worksheet includes multiple-choice questions, true-or-false statements, short-answer responses, a labelled diagram, a categorisation activity, and a short-note task. These activities ask students to recognise physical climate records, identify limitations in short-term observations, explain greenhouse gas emissions, compare different forms of environmental evidence, and propose evidence that could help evaluate a community action.

Included resources

• Printable Grade 7 science worksheet with a focused reading passage and varied response activities.
• Separate PDF answer key for checking student work.
• Teacher Guide within the answer key PDF, featuring Learning Objectives, Teaching Tips, Discussion Questions, and Common Mistakes.
• Student Notes lines at the bottom of the worksheet for recording key ideas.

Classroom use

Use this climate science worksheet when introducing evidence of past climate, reviewing greenhouse gases, or helping students distinguish short-term observations from long-term environmental patterns. It can support independent practice after a lesson, guided reading and discussion, or review of how scientists evaluate explanations and proposed solutions.

The resource is labelled with the BC framework and the lesson topic Geological Time, Biodiversity and Climate. No specific official curriculum code is supplied, so the listing does not claim alignment to a particular coded outcome. The separate answer key and embedded teacher guidance provide practical support for checking responses and discussing evidence quality, responsible knowledge sharing, and climate-related decisions.