Middle School Earth Science: Solar System, Seasons, Moon Phases and Plate Tectonics
Middle school earth science, from the solar system to plate tectonics
It is October, and half your class still says the seasons happen because Earth moves closer to the Sun. Another group is sure the Moon's phases are Earth's shadow. These ideas do not disappear after one reading. They change when students build a model, make a prediction and then check it. The units below are organized around that habit.
See the earth and space unit →The units
Earth science units for Grades 6–8
Start with the two earth science units. The engineering unit and the genetics unit round out a full middle school science year.
Earth and Space: Solar System, Seasons & Moon Phases | 8 Lessons, 6 Model Labs | Grades 6–8
Eight lessons on scale, orbits, seasons, moon phases and eclipses, with six model labs.
Plate Tectonics and the Rock Cycle | 8 Lessons, Case Cards & a Project | Grades 6–8
Plate boundaries, rock types and the rock cycle, ending in evidence-based hazard statements.
Engineering Design Challenges | 8 Challenges, Case Cards & a Project | Grades 6–8
Eight design tasks with paper and cards, each with a written explanation of choices.
Genetics and Heredity | 8 Lessons, 8 Inheritance Models & a Project | Grades 7–8
DNA, alleles, Punnett squares and mutation for Grades 7–8, with keys in the teacher guide.
Middle School Science Bundle | Earth and Space, Plate Tectonics, Genetics & Engineering Design | 4 Units | Grades 6–8
All four science units in one purchase, for a full year of Grades 6–8 science.
Topic map
Which topic is covered where
| Topic | Where to find it | Closest NGSS area |
|---|---|---|
| Solar-system scale | Lesson 1, Earth and Space unit | MS-ESS1 |
| Gravity and orbits | Lesson 2, Earth and Space unit | MS-ESS1 |
| Rotation and revolution | Lesson 3, Earth and Space unit | MS-ESS1 |
| Seasons | Lesson 4, Earth and Space unit | MS-ESS1 |
| Moon phases and eclipses | Lessons 5 to 7, Earth and Space unit | MS-ESS1 |
| Evidence that plates move | Lesson 1, Plate Tectonics unit | MS-ESS2 |
| Plate boundaries | Lessons 3 to 5, Plate Tectonics unit | MS-ESS2 |
| Rock types and the rock cycle | Lessons 6 and 7, Plate Tectonics unit | MS-ESS2 |
| Natural hazards | Lesson 8, Plate Tectonics unit | MS-ESS3 |
NGSS areas are the closest match only. No alignment or endorsement is claimed. For wider planning, see the NGSS science overview and the Middle School Science Bundle.
Seasons
Seasons and moon phases: the two misconceptions to plan for
Two ideas come up every year. Students say the seasons are caused by distance from the Sun, and that the Moon's phases come from Earth's shadow. Telling them otherwise rarely works. What works is a model that makes the wrong idea fail.
The Earth and Space unit separates rotation from revolution in Lesson 3, then uses a model to explain the seasons in Lesson 4. Six model labs cover distance, day and night, tilt, phases, eclipse alignment and an evidence journal. For the Moon, four task pairs ask students to justify an answer and then revise it. That revision step is where the shadow idea usually gets replaced. Lessons 5 and 6 treat how phases arise and in what order, and Lesson 7 handles eclipses as a question of alignment.
Plate tectonics
Plate tectonics: teach it as an argument from evidence
Plate tectonics is often taught as a list of terms: three boundary types, a few layers, a handful of rocks. Students memorize the list and cannot say why anyone believes plates move.
The Plate Tectonics and the Rock Cycle unit starts with the evidence that plates move, then separates the lithosphere from the asthenosphere. Divergent, convergent and transform boundaries each get a lesson, so none is rushed. The second half covers rock types and paths through the rock cycle. The last lesson uses claim, evidence and reasoning (CER) so students support statements about hazards with evidence. The tone stays sober: hazards are treated as science questions, not as stories about disaster.
Sequence
How the two units fit together in a school year
Many teachers split earth science into two blocks. One block covers space systems, the other covers the planet's surface and interior. The two units match that split. Each has eight lessons with the same three pages: an explanation, a practice page with explanation, and a case card. Students learn the routine in the first unit and move faster in the second.
If you teach a mixed science course, the Genetics and Heredity unit for Grades 7–8 and the Engineering Design Challenges unit sit alongside these two. Neither is earth science, but together they cover a full range of middle school topics. For more hands-on ideas to pair with the units, see this page on hands-on science activities for Grades 6–9.
Teacher support
What the teacher guides give you
Out-of-field science teachers and busy specialists need the same thing: answers they can trust and a plan for the lesson. Each unit has a separate teacher guide. The Earth and Space guide is 23 pages and the Plate Tectonics guide is 13 pages. Both include answers for all eight lessons and an assessment key with feedback.
The Earth and Space guide also has keys for the six model labs and the four moon-phase task pairs. Both guides have a chapter on differentiation and observation. The material gives no timings, so you plan by lesson. Editable DOCX text editions let you change wording for your class, and each unit has a 17-slide presentation. Students get PDF classroom material, 47 pages for Earth and Space and 33 pages for Plate Tectonics.
Planning
A simple way to run the earth science block
- Pick the block orderChoose space first or Earth's surface first. The units are self-contained, so either order works.
- Preview the misconceptionsAsk students why seasons happen and why the Moon changes shape. Keep their answers to compare later.
- Teach one lesson at a timeUse the explanation page, then the practice page, then the case card. The same routine repeats.
- Run the labs and task pairsLet students build the model, predict, test and revise their answer in writing.
- Finish with the learning checkUse the learning check and the short project, then compare students' answers with their first ones.
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Questions teachers ask
Frequently asked questions
Which standards are these units closest to?
The Earth and Space unit is closest to NGSS MS-ESS1. The Plate Tectonics unit is closest to NGSS MS-ESS2 and MS-ESS3. No alignment or endorsement is claimed.
Are answers included?
Yes. Each unit has a separate teacher guide with answers for all eight lessons and an assessment key with feedback.
How long does each unit take?
The material does not state a duration. Plan by lesson. Each lesson has three pages, and you can use the lessons in order or choose the ones you need.
Which moon phases are covered?
New and full Moon, the quarter phases, and the waxing and waning phases. Each has a task that asks students to justify and then revise an answer.
Can I edit the materials?
Yes. Both units include editable DOCX text editions of the classroom material and the teacher guide. The PDF is the print reference, so line breaks in the DOCX may differ.
What if I teach UK or Australian classes?
The units are written for Grades 6–8. Teachers in the UK and Australia often use them with roughly Years 7 to 9.
Cover the full middle school science year
The Middle School Science Bundle includes the two earth science units, the genetics unit and the engineering design unit. You save $29.97 compared with buying the units separately.
See the science bundle →