A Mixture of Iron,salt and Sand Can Be Separated Using

question 23

Multiple Choice

A mixture of iron,salt and sand can be separated using a magnet,water,a filter and a hot plate.Think about this separation.The separation of this mixture

• A)uses only physical changes or processes.
• B)uses only chemical changes or processes.
• C)uses both chemical and physical changes or processes.
• D)cannot be done with the materials listed.

---

Definitions:

Overt Observation

A research method where the subjects are aware that they are being observed, which can impact their behavior but also adheres to ethical transparency.

Participant Observation

A qualitative research method involving the researcher immersing themselves in a group or community to observe behaviors and interactions firsthand.

Researcher Reactivity

A phenomenon where the presence or behavior of the researcher influences the subjects' behavior, potentially biasing the study results.

Hawthorne Effect

A phenomenon where individuals alter their behavior due to their awareness of being observed as part of a study.