NASA Robots on Mars

May 12, 2026, 16:48
InternationalScience

Introduction

NASA has two robots on Mars. Their names are Perseverance and Curiosity. They study the rocks on the red planet.

Main Body

Perseverance is in a place called Jezero Crater. It found very old rocks. These rocks come from volcanoes. This helps scientists understand the early history of Mars. Curiosity is in Gale Crater. It has some problems. The sharp rocks broke its wheels. One time, its drill got stuck in a rock. The team fixed it. Now, Curiosity is climbing a big mountain. It looks for signs of old life. Both robots are still working hard.

Conclusion

The robots are old and tired, but they still explore Mars.

Learning

🚀 The 'It' Shortcut

In this story, the writer uses the word It many times. Why? Because we don't want to repeat the robot's name every time.

How it works: Robot Name →\rightarrow It

Example 1: "Perseverance is in Jezero Crater. It found old rocks." (It = Perseverance)

Example 2: "Curiosity is in Gale Crater. It has some problems." (It = Curiosity)

🛠️ Action Words (Now vs. Past)

Notice how the story changes time. Look at these words:

Now (Present)Before (Past)Change
iswasstate
findsfounddiscovery
fixesfixedrepair
lookslookedsearch

A2 Tip: To talk about things that already happened (like the broken wheels), just add -ed to the end of most action words.

  • Fix →\rightarrow Fixed
  • Work →\rightarrow Worked

Vocabulary Learning

crater (n.)
A bowl-shaped hole in the ground, usually made by an impact.
Example:The rover landed near a large crater on Mars.
volcanoes (n.)
Mountains that erupt lava and ash.
Example:The rocks on Mars came from ancient volcanoes.
scientists (n.)
People who study and research.
Example:Scientists use the rover to learn about Mars.
explore (v.)
To travel around to learn about something.
Example:The robots explore the surface of Mars.
mountain (n.)
A very high hill.
Example:Curiosity is climbing a big mountain.