Minerals quiz for Grade 7 with answers on properties

📚 Quick Study Guide

• 💎 Definition: Minerals are naturally occurring, inorganic solids with a definite chemical composition and crystal structure.
• 🧪 Properties: We identify minerals based on their properties:
• ✨ Luster: How light reflects from a mineral's surface (e.g., metallic, glassy).
• 🌈 Color: The visual appearance of the mineral (though often unreliable on its own).
• streakStreak: The color of a mineral's powder when rubbed on a streak plate.
• 💪 Hardness: A mineral's resistance to being scratched (measured on the Mohs scale).
• 🔪 Cleavage/Fracture: How a mineral breaks – cleavage is breaking along smooth planes; fracture is irregular breaking.
• ⚖️ Specific Gravity: The ratio of a mineral's weight to the weight of an equal volume of water.

🧪 Practice Quiz

1. Which property describes how light reflects off a mineral's surface?
   1. Color
   2. Hardness
   3. Luster
   4. Streak
2. What is the term for a mineral's resistance to being scratched?
   1. Cleavage
   2. Hardness
   3. Fracture
   4. Luster
3. Which of the following is NOT a characteristic of a mineral?
   1. Naturally occurring
   2. Organic
   3. Solid
   4. Definite chemical composition
4. What is the color of a mineral's powder called?
   1. Luster
   2. Streak
   3. Hardness
   4. Cleavage
5. If a mineral breaks along smooth, flat surfaces, it exhibits:
   1. Fracture
   2. Hardness
   3. Cleavage
   4. Luster
6. Which scale is used to measure the hardness of minerals?
   1. Richter Scale
   2. Celsius Scale
   3. Mohs Scale
   4. pH Scale
7. What property compares a mineral's weight to the weight of an equal volume of water?
   1. Hardness
   2. Luster
   3. Specific Gravity
   4. Streak