which statement about a rock sample is an inference? 1. the rock scratches a glass plate. 2. the rock was…

which statement about a rock sample is an inference? 1. the rock scratches a glass plate. 2. the rock was formed 100 million years ago. 3. a balance indicates the rock’s mass is 254 grams. 4. the rock has no visible crystals and is red.

which statement about a rock sample is an inference? 1. the rock scratches a glass plate. 2. the rock was formed 100 million years ago. 3. a balance indicates the rock’s mass is 254 grams. 4. the rock has no visible crystals and is red.

Answer

Brief Explanations:

An inference is a conclusion based on evidence and reasoning. Scratching a glass plate, measuring mass, and observing color and crystal - presence are direct observations. Determining the rock's age of 100 million years ago requires analysis and interpretation of data (such as radiometric dating results), which is an inference.

Answer:

  1. The rock was formed 100 million years ago.