Question

5.4what is a physical property of iron filings?a. iron filings are magnetic.c. iron filings are flammable.b. iron filings are not magnetic.d. iron filings are soluble in water.5.9what happens to the physical properties of sand and water when they are mixed?a. the physical properties of sand change completely.b. the physical properties of water change completely.c. the physical proprieties of both sand and water remain the same.d. the physical properties of both sand and water change completely.

Explanation:

• For the first question: Iron filings are magnetic, which is a well - known physical property. Flammability is a chemical property (involving a chemical reaction with oxygen), and iron filings are not soluble in water.
• For the second question: When sand and water are mixed (a physical mixture), no chemical reaction occurs. Physical properties are characteristics that can be observed without changing the substance's chemical composition. Since there is no chemical change, the physical properties of both sand and water remain the same.

Answer:

5.4: A. Iron filings are magnetic.
5.9: C. The physical proprieties of both sand and water remain the same.