Printable Earth-Layers Evidence Worksheet | Grade 8 Science

This Grade 8 Science worksheet teaches students to back claims about Earth's interior with evidence. Learners calculate density, read seismic wave tables, and decide what the data can and cannot prove about the crust, mantle, and core. Twelve tasks move from recall to evidence-based arguments.

At a Glance

• Grade: 8 · Subject: Science
• Standard: Use density and seismic evidence to describe and compare Earth's interior layers
• Skill Focus: Evidence-based reasoning about Earth's layers and seismic data
• Format: 5 pages · 12 problems · Answer key included · PDF
• Best For: Formative check after direct instruction
• Time: 35–45 minutes

What's Inside

Part A has 3 foundation items: two multiple-choice questions and a matching table. Part B has 6 application items that use a density table and a seismic table, with calculations, units, and short explanations. Part C has 3 claim-evaluation items, including a synthetic planet. A reference box lists Earth's radius, the density formula, and the P-wave and S-wave rules. The answer key runs 2 pages.

Skill Progression

• Guided practice: 3 foundation items with answer choices and a matching table.
• Supported practice: 6 items with data tables and a reference box.
• Independent practice: 3 claim-evaluation items requiring written evidence.

The sequence follows gradual release: I Do, We Do, You Do.

Standards Alignment

No standard code is attached to this worksheet. It addresses the middle school Earth science idea that Earth's layers differ in composition, density, and state, and that scientists infer this from indirect evidence such as seismic waves. Teachers can add their own district's standard code to lesson plans, IEP goals, or curriculum mapping tools.

How to Use It

• After direct instruction: assign Parts A and B as independent practice on Earth's interior.
• End of unit: use Part C as a formative check of written reasoning.

Observation tip: listen for whether students cite Table 2 values rather than making general statements. Expect 35–45 minutes for the full set.

Who It's For

Built for Grade 8 Science classes, including intro Earth science courses. Part A supports students who need vocabulary review, while Part C stretches strong data readers. Pair it with an Earth's layers diagram or an anchor chart on P-wave and S-wave behavior.

The Grade 8 Science worksheet Earth-Layers Evidence Check asks students to use density calculations and seismic wave data to justify claims about Earth's crust, mantle, outer core, and inner core. Across 12 tasks, learners move from naming layers in order, to computing density with ρ = m ÷ V, to evaluating claims such as whether S-wave evidence proves the whole core is liquid. All data are synthetic and supplied in tables, so students practice citing evidence rather than recalling facts. The structure follows the gradual release model described by Fisher & Frey (2014), which moves learners from guided work toward independent application. A two-page answer key supports quick scoring. Teachers can use the set as a formative check after direct instruction on Earth's interior, and students practice the core science skill of constructing evidence-based explanations from data.