| A | B |
|---|
| term used to describe all the salts | halite |
| term used to describe how a mineral reflects light | luster |
| density compared to water's density | specific gravity |
| color of mineral in powder form | streak |
| softest mineral on Mohs scale of hardness | talc |
| hardest mineral known | diamond |
| mineral splits in a plane | cleavage |
| largest group of rock-forming minerals | silicates |
| Quartz has which shape internally | hexagonal |
| As magma cools, its __________ combine into compounds that form a crystal structure, and it becomes a mineral | atoms |
| Minerals are made of one or more | elements |
| What makes a mineral an ore | mined for a profit |
| Which of the following is the best choice for a mineral? coal, salt, sugar, or wood | salt |
| The largest group of rock-forming minerals is called the | silicates |
| The hardness of quartz is 7. This indicates that quartz will scratch which of the following minerals? talc, apatite, topaz, or calcite | talc, apatite and calcite |
| What is the characteristic of minerals that is being tested with scratching various materials? | hardness |
| What two properties make a mineral a gem? | rare and beautiful |
| What is the most common element in Earth's crust? | oxygen |
| Oxygen and silicon make up almost __________ of Earth's crust | 75% |
| The arrangement of __________ determines the type of crystal for minerals | atoms |
