Fossil records and evidence for evolution are the focus of this Grade 9 Science worksheet, exploring how preserved remains, rock layers, and dating methods help scientists reconstruct the history of life on Earth. Students investigate how fossils reveal past organisms and environments, how transitional fossils provide evidence of evolutionary relationships, and why the fossil record does not represent every organism equally.

Read the evidence preserved in rocks

The reading passage introduces fossils as preserved remains, impressions, or traces, including bones, shells, leaf impressions, and footprints. Students examine how burial by sediment can support fossil formation and how sedimentary rock layers help establish the relative ages of fossils. The passage distinguishes relative dating from radiometric dating, which uses radioactive changes in minerals to estimate an age in years.

Evolutionary evidence is another central focus. Students explore how transitional fossils display intermediate features between major groups of organisms and how comparing fossils from different periods can reveal when traits appeared and when groups became extinct. The resource also introduces taphonomy, the study of what happens to remains from death through burial and preservation. By considering why hard parts are more likely to survive than soft bodies, learners examine preservation bias and its effects on scientific interpretations of ancient life.

Questions that develop scientific reasoning

Multiple-choice questions ask students to distinguish fossil traces from body fossils, interpret the order of undisturbed rock layers, identify the purpose of radiometric dating, and explain why scientists use more than one method to investigate fossil ages. True-or-false statements reinforce fossil formation, dating principles, transitional fossils, and unequal preservation. Short-answer questions ask learners to explain what fossils reveal about past organisms and environments, compare dating methods, and describe how preservation bias can influence conclusions.

A labelled diagram, categorisation activity, and short-note task extend the work beyond the reading passage. These activities give students additional ways to organise information and communicate their understanding of fossil evidence and evolutionary history.

Included for classroom and teacher use

• Printable Grade 9 Science worksheet with a reading passage and fossil-evidence activities.
• Separate PDF answer key for checking student responses.
• Student Notes lines at the bottom of the worksheet for recording key ideas.
• Teacher Guide inside the answer key PDF, with Learning Objectives, Teaching Tips, Discussion Questions, and Common Mistakes.

Use it during evolution instruction

Introduce the passage when teaching the fossil record, assign the activities for independent practice, or use the worksheet to review evidence for evolution before an assessment. Students can refer to the text as they compare dating methods and consider why gaps in the fossil record do not necessarily mean that an organism or evolutionary relationship never existed.

TEKS is the named framework in the resource details, but no specific TEKS code is supplied. The answer key supports response checking, while the included Teacher Guide provides prompts for discussion and helps teachers address misconceptions about fossil preservation and the interpretation of evidence.