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Using Satellite Imagery to Measure Glacial Retreat — Reading Comprehension

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This educational passage, "Using Satellite Imagery to Measure Glacial Retreat," introduces 6th-grade students to the critical role of technology in understanding environmental changes. Aligned with NGSS MS-ESS3-5, it explores how scientists use satellite imagery, a type of remote sensing, to monitor the shrinking size of glaciers and ice caps around the world. The passage explains key terms like climate change and global warming, making complex concepts accessible. Students will learn about the evidence for rising global temperatures by observing glacial retreat and its impact. This resource includes engaging activities like multiple-choice questions, a glossary, and short answer questions, all designed to deepen comprehension and critical thinking. All components are audio integrated for enhanced learning.

CONTENT PREVIEW

Satellite observes shrinking glacier carving through mountains, melting into rising seas. — Glacial retreat monitored from space, revealing ice loss and sea-level rise.

Imagine giant rivers of ice, slowly carving their way through mountains and across land. These are glaciers, massive bodies of ice that have existed for thousands of years. But something is happening to them: they are shrinking. This shrinking is called glacial retreat, and it's a big clue about changes happening to our planet. Scientists are using amazing technology to keep track of these icy giants.

One of the most powerful tools scientists use is satellite imagery. Think of satellites as cameras in space, orbiting Earth and taking pictures from high above. These satellites can capture images of glaciers all over the world, even in remote, hard-to-reach places like the Arctic and Antarctic. By taking pictures of the same glacier over many years, scientists can see how much it has shrunk or moved. This is a form of remote sensing, which means gathering information about an object or area without actually touching it.

Why are glaciers retreating? The main reason is climate change, which refers to long-term shifts in temperatures and weather patterns. Our Earth's average temperature has been rising, a process called global warming. This warming causes ice to melt faster than it can form. When glaciers melt, the water flows into oceans, contributing to sea-level rise, which can affect coastal communities and ecosystems.

Scientists compare current satellite images with older ones to measure exactly how much ice is lost. They can even use special sensors that can see through clouds or work at night, providing continuous data. This information is crucial for understanding the impact of global warming. It helps us see the evidence that Earth's temperatures are indeed rising and how quickly these changes are happening. By studying glacial retreat, we can better understand the factors causing global temperatures to increase and think about what we can do to protect our planet for future generations.

Interesting Fact: Some glaciers are so large that they cover entire mountain ranges, and if all the world's glaciers and ice sheets melted, global sea levels could rise by over 200 feet!

What is the main tool scientists use to track glaciers?

Satellite imagerySubmarinesThermometersRulers

What is the shrinking of glaciers called?

Glacial retreatIce expansionWater cyclingSnowfall

True or False: Global warming causes glaciers to grow.

TrueFalse

How do satellites help track glacial retreat?

Take pictures over timeMeasure ocean depthBroadcast weather newsClean the atmosphere

What is a result of melting glaciers?

Sea-level riseColder oceansMore rainfallLand expansion

What does remote sensing involve?

Gathering info without touchingDirect physical contactStudying distant starsBuilding faraway sensors