Question

which statement describes streak?
○ streak refers to the way light is reflected by a mineral.
○ streak is the least accurate way to identify minerals.
○ streak is tested by scraping a mineral across a streak plate.
○ the color of the streak is the same as the color of the mineral.

Explanation:

• The way light reflects off a mineral is luster, not streak.
• Streak is one of the more accurate mineral identification tests, not the least.
• A mineral's streak color often differs from its external color.
• Streak is defined as the color of a mineral's powder, tested by scraping it on a streak plate.

Answer:

Streak is tested by scraping a mineral across a streak plate.