What information is revealed by magnetism on rocks?
A. Mass
B. Minerals
C. Luster
D. Age
B. Minerals
B. Minerals
The information revealed by magnetism on rocks is primarily related to their mineral composition.
To determine the answer, one would need to understand the principles of magnetism and how it applies to rocks. Here's a step-by-step explanation of how to arrive at the answer:
1. Rocks can have varying levels of magnetism based on the presence of certain minerals. Some minerals, such as magnetite, are strongly magnetic and can give rocks magnetic properties.
2. To determine if a rock is magnetic, you can use a magnet. Gently rub the rock with a magnet and observe if it attracts or repels the magnet. If the rock is attracted to the magnet, it contains magnetic minerals.
3. Magnetism can provide information about the mineral composition of rocks. Different minerals have different magnetic properties, so the presence or absence of magnetism can indicate the type of minerals present in the rock.
Based on this understanding, the correct answer is B. Minerals. The presence or absence of magnetism on rocks can reveal information about the minerals contained within the rock.