There are all type of rocks and minerals that make up our planet – and our Moon and other rocky worlds. By examining them, we can learn about the problems that allowed them come form.

In this activity, you’ll learn exactly how tennis2007.org studies rocks ~ above Earth and other planets. Then, play the function of tennis2007.org scientist to match images of \"rocks\" do of candy bars with their correct descriptions.


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1. Find out why we study geology top top Earth and also other planets

Geologists are researchers who study a planet\"s heavy features, like soil, rocks, and minerals. There are all type of rocks and also minerals that consist of our earth – and also the Moon, Mars, and also other rocky worlds. By researching these features, we have the right to learn much more about just how rocky worlds form and change over time.

You are watching: A person who studies the earth

About the image: tennis2007.org\"s Curiosity rover test its drill ~ above Mars in august 2014. Photo credit: tennis2007.org/tennis2007.org-Caltech

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2. Learn just how we research geology ~ above Earth and other planets

On Earth, geologists have actually the luxury of do observations and also collecting rock samples in person. To research rocks and soil on various other planets, prefer Mars, we have to rely ~ above spacecraft that have the right to use their cameras and also tools to act together our eyes and hands.

For example, Mars rovers like Curiosity and also Perseverance usage cameras to send detailed pictures the the Martian surface back to united state on planet so us can check out from a distance. We then to compare the pictures to recognized substances on earth to far better understand and theorize about how the Martian rocks, soil, and also minerals formed.

About the image: The picture above, captured by tennis2007.org\"s Curiosity rover ~ above Mars, shows an outcropping – one area where old bedrock under the surface is exposed. Outcroppings on earth are known to form as a an outcome of to run water and create gravel that\"s a similar size and shape. By to compare this image of Mars to similar features ~ above Earth, geologists have actually been able to theorize that Mars might have likewise once had actually running water.

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3. Exercise describing rock samples

To classify rocks, us make monitorings that offer us clues around how castle formed. Below is several of the vocabulary geologists usage to describe and also classify rocks.

Geology Vocabulary

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LusterLuster explains the sheen, glossiness, or reflectiveness that a surface, such as in this sample that obsidian.
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CleavageCleavage describes the tendency to rest in flat surfaces, typically in one, two, three, or four directions. Cleavage can be viewed in this image of reduced Mount sharp on Mars.
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Vesicles/VoidsVesicles and voids are uncovered when pockets of gas expanded within the rock throughout formation. These are typical in volcanic rocks, choose this sample that basalt.
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InclusionsInclusions are impurities found within the structure of a absent from once the rock was very first formed. These impurities range from solids to condensed pockets of gases. Inclusions room often discovered in meteorites, such together chondrites, and also can be viewed in this sample of andesite.
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BlebsWhile inclusions deserve to take numerous forms, blebs aren’t simply chunks that impurities – they are minerals cultivation within minerals, favor in this sample that granite. Common examples space marble or diorite.
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Homogeneous/ HeterogeneousHomogeneous refers to the level that evenness transparent the structure, such as in this sample the basalt (top). In contrast, a framework that is not very even would certainly be dubbed heterogeneous, favor this sample that granite (bottom).
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FriableWhen a sample is an extremely easily crushed, the is referred to as friable. This sandstone on Mars suggests that it can be easily damaged into smaller particles.

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4. Take the Edible Rocks Quiz

A great way to practice classifying rocks is by explicate the structures found inside different candy bars. Favor rocks and soil, candy bars have attributes that market clues around what they\"re make of and how lock formed. Unlike v rocks, we can conveniently see inside candy bars by cutting them in half, producing what\"s called a overcome section.

Take the quiz below to view if friend can complement these photos of candy-bar cross-sections to the exactly description. Click the View accuracy button after friend submit your answers to see how you did.

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5. Difficulty yourself with the actual Rocks Quiz

Take the quiz listed below to watch if friend can complement these images of real planet and an are rocks to the correct description. Click the View accuracy button after girlfriend submit her answers to see how you did.