Grades 6–8 · Semester 6 · 55 readings
Look deeper into the wider world
Begin with changing stars and traveling knowledge. Follow the connected explanations through evidence and signals across a journey, keeping each small group together and taking time to understand its illustrations.
Start reading →One possible pace is 3–4 explanations a week over 16 weeks. Keep each small unit together, revisit its pictures and allow more time whenever an idea needs it.
Unit 1Changing stars and traveling knowledge2 readings ⌄
Different stellar masses lead to different endings; exchanges connect a historical network.
- Why do different stars have different endings?Earth & Space
- How could goods and ideas travel farther than one merchant?History & Evidence
Unit 2Evidence and the stories we connect2 readings ⌄
Selected observations and neighboring film shots can shape the conclusions we draw.
Unit 3Signals from distant places2 readings ⌄
Finite signal speed shapes rover communication; matter outside a black hole can emit light.
- Why can a Mars rover not answer Earth immediately?Earth & Space
- How can a black hole have bright surroundings?Earth & Space
Unit 5Reading water, wind and seasons3 readings ⌄
People combine observations of a particular place with designs and calendars that fit its conditions.
Unit 6Social information and memorable examples2 readings ⌄
Group responses and accessible memories can influence a judgment in different ways.
Unit 7How a structure stands and a view changes2 readings ⌄
Arches transfer loads to supports; camera position changes relative image sizes.
Unit 8Molecules at useful surfaces4 readings ⌄
Porous materials, polymer networks and metal deposits turn microscopic interactions into familiar functions.
- How can a little silica-gel packet help keep a box dry?Materials & Matter
- How can activated carbon remove some dissolved substances from water?Materials & Matter
- How can dry granules inside a diaper become a water-filled gel?Everyday Life
- How can electricity add a thin metal coating to another object?Materials & Matter
Unit 9How useful solids change4 readings ⌄
Protective reactions, growing crystals, bonded layers and molecular links give materials different properties.
- Why can zinc protect steel even beside a small scratch?Materials & Matter
- Why does wet plaster become solid before all its water has dried?Materials & Matter
- How can laminated glass hold broken pieces together?Materials & Matter
- How does vulcanization help rubber keep its shape?Materials & Matter
Unit 10Hidden work inside the body4 readings ⌄
Moving cells, dispersed fat, blood formation and elastic tissue support everyday body functions.
Unit 11Different ways to stay alive4 readings ⌄
Air tubes, stored stings, water channels and dormant seeds meet different biological needs.
Unit 12Routes through changing environments4 readings ⌄
Ice, electrical discharge, beach sand and sediment-rich water follow routes shaped by different physical conditions.
Unit 13Balances around a changing planet4 readings ⌄
Ground forces, wetland growth, city heat and atmospheric chemistry reveal several kinds of environmental balance.
- Why can wet ground lose strength during strong earthquake shaking?Earth & Space
- How can a salt marsh build its surface upward?Earth & Space
- Why can a city stay warmer than nearby countryside after sunset?Earth & Space
- How does a thin amount of ozone high above Earth reduce ultraviolet exposure?Earth & Space
Unit 14Materials and timing in public systems4 readings ⌄
Rail joints, pumping stations, electricity timing and concrete chemistry support large shared services.
Unit 15Structures that respond to forces4 readings ⌄
Heat-responsive seals, speed governors, pressure signals and angled cables show different ways to manage changing loads.
Unit 16Surfaces, streams and creative tools4 readings ⌄
Fresh plaster, bent wood, cutting streams and flowing water connect material processes with human purposes.
Unit 17Evidence and signals across a journey4 readings ⌄
Flotation recovers evidence, allocation rules translate counts, tonewheels generate signals and cold chains coordinate protection.
- How can water help archaeologists find tiny ancient seeds?History & Evidence
- Why does sharing representative seats require more than rounding percentages?Societies
- How could spinning metal wheels help an organ make musical tones?Arts & Music
- How can chilled food stay cold through several different journeys?Systems