Earth Spheres Reading Worksheet
Earth & Space Science
Earth's Four Connected Spheres
Read the passage carefully, then use the text evidence to answer the questions on Page 2.
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Earth as a System
Earth is made up of several major systems that work together all the time. Scientists often describe these systems as spheres. Even though the word “sphere” usually means a round shape, these spheres are not four giant balls stacked on top of each other. Instead, the word “sphere” is a way to group similar parts of the Earth. Each sphere includes certain materials or living things, and the spheres overlap and interact in many places.
The Geosphere
The geosphere includes all the solid parts of Earth. This sphere is made of rocks, soil, sand, and the landforms we see, such as mountains, valleys, and plains. It also includes the molten rock deep inside the Earth. The geosphere is always changing, even if the changes happen slowly. Wind, water, and ice can break rocks apart and move the pieces to new places.
The Hydrosphere
The hydrosphere includes all of Earth’s water. This includes oceans, rivers, lakes, groundwater, and glaciers. Water moves through the water cycle by evaporating, forming clouds, and falling as rain or snow. As it flows, water can shape land by carving river valleys, smoothing rocks, and carrying soil downhill.
The Atmosphere
The atmosphere is the layer of gases that surrounds Earth. It includes the air we breathe and the clouds we see in the sky. The atmosphere creates weather and climate. Winds move heat and water vapor around the planet. Changes in air pressure and temperature can create storms with powerful winds that shape Earth’s surface.
The Biosphere
The biosphere includes all living things on Earth, including plants, animals, fungi, and bacteria. Living things depend on water, air, and land to survive. At the same time, living things change Earth's surface: plant roots hold soil in place, animals dig tunnels, and humans build cities, farm land, and use natural resources.
Constant Interactions Across Spheres
The four spheres are constantly interacting. For example, water vapor from the atmosphere becomes rain, which falls onto the geosphere and soaks into the ground. That water becomes part of the hydrosphere and may flow into rivers or oceans. Plants in the biosphere use the water to grow. In return, plants release water vapor into the atmosphere. Because each sphere affects the others, Earth works like one connected system. Understanding these interactions helps scientists explain changes in weather, landforms, and ecosystems.
Quick Reference: Sphere Greek Roots
Geo- = Ground / Earth Rocks, soil, landforms
Hydro- = Water Oceans, rain, ice, rivers
Atmo- = Vapor / Air Gases, weather, wind
Bio- = Life Plants, animals, bacteria
Earth Systems Reading Comprehension Page 1 of 2 • Turn over for comprehension questions
Comprehension & System Analysis
Complete each response using the provided sentence frames and evidence from the text.
Scaffolded Responses Use complete sentences
1
How do scientists define a "sphere" when talking about Earth, and why is it not just a physical ball?
Sentence Frame: Scientists use the word "sphere" to group ____________________, rather than physical balls, because these systems ____________________.
2
How does the hydrosphere interact with the geosphere to shape the surface of our planet? Provide two examples from the text.
Sentence Frame: Water from the hydrosphere changes the geosphere by ____________________ and by ____________________.
3
In what ways do living organisms in the biosphere actively change both the geosphere and the atmosphere?
Sentence Frame: Living things affect the geosphere when ____________________, and they affect the atmosphere when ____________________.
4
Trace the complete cycle described in the last paragraph: Explain how a single rain event connects all four spheres.
Sentence Frame: First, water vapor in the atmosphere falls as rain onto the geosphere. Next, the hydrosphere and biosphere connect because ____________________. Finally, the cycle repeats when plants ____________________.
Earth Systems Reading Comprehension Page 2 of 2 • Assessment Complete
