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Reservoir Rises as Storms Bring Mixed Effects

New satellite images compare two dates.

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Science news editorial illustration for Satellite Images Show Navajo Reservoir Rising Nearly 18 Metres

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9 and . a of 18 20 and 7.

The , but . On 7, the its 2019.

Source: NASA Earth Observatory, 2026-11-11.

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Try 2 questions about this story, then explain one idea in your own words. Check the text whenever you need to.

In this lesson: Connect satellite comparisons with the dated water-level record.

Print a worksheet · Teacher guide & answers

Read and understand · 1/2What do the images compare?

Read the answer and explanation

The reservoir before and after autumn storms. The opening paragraph describes the before-and-after comparison.

Clue: Landsat 9 images show Navajo Reservoir before and after autumn storms. NASA reported a rise of nearly 18 metres between September 20 and November 7.

Read and understand · 2/2Which claim does the November 7 record support?

Read the answer and explanation

The highest level since August 2019. The second paragraph states the limited comparison since August 2019.

Clue: The water increase brought short-term drought relief, but rivers also flooded nearby communities. On November 7, the reservoir reached its highest level since August 2019.

Grammar in this story: A dated comparison

since August 2019

Since sets the starting point for the comparison. It does not establish an all-time record.

Your turn

Explain the change and its mixed effects.

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The reservoir rose nearly 18 metres between September 20 and November 7. Water increased and drought eased in the short term, while nearby communities also suffered river flooding.

Your answer can be different. Give a reason and use your own words.

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