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The Search for Alien Life

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Format: Interactive (Online), Printable (PDF)
Grades: 5678
Subjects: scienceela
Standards: MS-ESS1-1
Languages: English, Spanish

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Reading passage

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About this reader

science,ela

Written by Workybooks TeamPublished by Workybooks

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CONTENT PREVIEW

Europa's Mysterious Interior (Artist's Concept) — Scientists believe that under the icy surface of Jupiter's moon Europa a saltwater ocean exists that may contain more than twice as much liquid water as all of Earth's oceans combined"Europa's Mysterious Interior. (Artist's Concept)" / NASA.

Are we alone in the universe? Scientists are working to answer this question through carefully planned space missions. Evidence shows that several locations in our solar system may have conditions suitable for life. Over the next decade, new missions will search for signs of life beyond Earth.

Three major missions will lead the search. The Europa Clipper will explore Jupiter's moon Europa. Scientists observe that Europa has a thick ice shell covering a deep ocean. This ocean may contain twice as much water as all of Earth's oceans combined. The spacecraft will fly by Europa nearly 50 times. Its instruments will measure the ice thickness and analyze the ocean below. If the ocean has the right chemicals and energy sources, life could exist there.

The Mars Sample Return mission will bring Martian rocks to Earth. Previous missions found evidence that Mars once had liquid water on its surface. The new mission will collect rock samples that may contain fossils or chemical signs of ancient life. Scientists will study these samples in laboratories with powerful equipment. This direct analysis can reveal details that rovers cannot detect on Mars.

New space telescopes will study exoplanets, which are planets orbiting other stars. These telescopes will analyze the atmospheres of distant planets. Scientists look for biosignatures, which are gases that living things produce. On Earth, plants release oxygen through photosynthesis. If scientists detect similar gases on an exoplanet, it may indicate life exists there.

Each mission uses different methods to search for life. Europa Clipper will probe beneath an icy surface. Mars Sample Return will examine ancient rocks. Space telescopes will study planetary atmospheres from millions of miles away. Together, these missions tighten the search for life. The evidence they gather will help scientists understand where life can exist. The next decade may bring humanity's first confirmed discovery of life beyond Earth. This discovery would change our understanding of life in the universe.

Interesting Fact: Europa's ocean may have hydrothermal vents on its seafloor, similar to vents on Earth where unusual creatures thrive without sunlight. These vents could provide energy for alien life forms.

What is the main purpose of the Europa Clipper mission?

To land astronauts on JupiterTo explore Europa's ocean beneath its ice shellTo collect rock samples from JupiterTo study the Sun's atmosphere

How many times will Europa Clipper fly by Europa?

About 10 timesAbout 25 timesNearly 50 timesOver 100 times

What does the term 'biosignatures' mean in the passage?

Rocks from other planetsGases or chemicals that indicate the presence of lifeTypes of telescopes used in spaceThe distance between planets

Based on the passage, what evidence suggests Mars may have once supported life?

Mars has a thick atmosphere todayPrevious missions found evidence of liquid water on its surfaceMars has more oxygen than EarthAstronauts have visited Mars

Why will scientists bring Martian rocks back to Earth instead of studying them only on Mars?

Mars rovers cannot collect rocksLaboratory equipment on Earth can reveal details rovers cannot detectThe rocks are too heavy for Mars equipmentScientists want to display them in museums

How do new space telescopes search for life on exoplanets?

By landing robots on the planetsBy collecting rock samplesBy analyzing the atmospheres of distant planetsBy measuring the planets' temperatures only

If scientists detect oxygen in an exoplanet's atmosphere, what might this suggest?

The planet has no waterLife may exist there, similar to how plants produce oxygen on EarthThe planet is made entirely of gasThe planet is too hot for any exploration

What makes hydrothermal vents on Europa potentially important for alien life?

They could provide energy for life forms without sunlightThey make the ice melt completelyThey create oxygen in the waterThey allow spacecraft to land easily

True or False: Europa's ocean may contain twice as much water as all of Earth's oceans combined.

TrueFalse

True or False: All three missions described in the passage use the same method to search for life.

TrueFalse

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This engaging 500-word science reading passage explores humanity's search for life beyond Earthperfect for middle school students in grades 6-8. Students learn about cutting-edge space missions including Europa Clipperwhich will investigate Jupiter's icy moon Europaand the Mars Sample Return mission that will bring Martian rocks to Earth for detailed analysis. The passage also covers how new space telescopes study exoplanet atmospheres to detect biosignatures. Aligned to NGSS standard MS-ESS1-1 and Disciplinary Core Idea MS-ESS1.Athis resource helps students understand Earth's place in the universe and the methods scientists use to search for extraterrestrial life. The passage includes audio integration for enhanced accessibilityvocabulary support with 8-10 key scientific termsand differentiated versions for English Language Learners. Comprehensive activities include multiple-choice questionswriting promptsand graphic organizers that develop scientific literacy and critical thinking skills essential for understanding astrobiology and space exploration.