Question

a mineral breaks into cubes when struck with a rock hammer. it also leaves a red trail when scraped against an unglazed porcelain plate. which of the minerals properties are being measured? choose the two correct answers. streak cleavage color hardness

Explanation:

Streak is the color of the powder of a mineral when it is scratched across an un - glazed porcelain plate. Hardness can be measured by the ability of a mineral to scratch other substances or be scratched. Cleavage is the tendency of a mineral to break along smooth, flat surfaces, and color can be variable and less diagnostic compared to streak and hardness in some cases. Since the description mentions leaving a red trail when scraped (streak) and breaking into cubes (related to crystal form which can be related to hardness and cleavage in mineral identification), the two properties being measured are streak and hardness.

Answer:

streak, hardness