Classifying Rocks by Hardness

Nora and Oliver are on a rock-hunting adventure! They want to test the hardness of their rock collection using the Moh's Scale. Which tool should they use?

• A ruler

• A penny

• A magnifying glass

• A thermometer

Imagine you're a rock detective like Abigail, and you find a mysterious rock. You discover that you can scratch it with your fingernail, but not with a penny. How would you classify this intriguing rock?

• Very hard

• Medium hard

• Soft

• Very soft

Hey rock detectives! Can you help Anika and Noah figure out which of these is a physical attribute used to classify rocks?

• Weight

• Color

• Age

• Origin

Anika found a mysterious rock with a shiny surface during her adventure. What term would best describe its luster?

• Dull

• Metallic

• Glassy/Shiny

• Earthy

While exploring a mysterious cave, Kai stumbles upon a rock that is black and shiny. Which type of rock has Kai most likely discovered?

• Granite

• Obsidian

• Sandstone

• Limestone

Imagine you're a rock detective like Abigail, Aiden, or Zoe! What simple test can you perform to uncover the texture of a mysterious rock?

• Smell it

• Feel it

• Taste it

• Weigh it

Liam and Ava are on a rock-hunting adventure! They found two mysterious rocks. Liam's rock can scratch glass, while Ava's rock gets scratched by a penny. Which rock do you think is the tougher one?

• Liam's rock that scratches glass

• Ava's rock that is scratched by a penny

• Both rocks are equally hard

• It's a mystery we can't solve!

Liam and Michael are on a rock exploration adventure! They found a mysterious rock and want to test its properties. What is the main purpose of using a steel nail in their rock testing?

• To measure the weight

• To test the hardness

• To check the color

• To determine the luster

Imagine you're on a treasure hunt with Rohan and Evelyn, and you find a mysterious rock. If Rohan can easily scratch it with a steel nail, what can you infer about its hardness?

• It is very hard

• It is medium hard

• It is soft

• It is very soft

Zoe and Scarlett are on a rock-hunting adventure! They pick up a mysterious rock and wonder, what is the term used to describe how a rock feels to the touch?

• Luster

• Hardness

• Texture

• Color