Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? he is determining physical properties that are sufficient to identify the metal. he is determining chemical properties that are sufficient to identify the metal. he is determining physical properties that are insufficient to identify the metal. he is determining chemical properties that are insufficient to identify the metal.

He is determining physical properties that are sufficient to identify the metal.

Explanation:

A physical property is an aspect of matter that can be observed or measured without changing it. Examples of physical properties include color, molecular weight and volume. A chemical property may only be observed by changing the chemical identity of a substance.Density, electrical conductivity, and melting point are considered as physical properties and are sufficient to identify a metal as these properties are independent of the  amount of substance being examined.These properties are known as intensive properties and are used  to identify a substance by comparing the obtained values with standard values.

So, the right choice is:

He is determining physical properties that are sufficient to identify the metal.

The density of water is 1 g/cm cubed and in order for the pebble to sink its density has to be greater than the density of water and in order for the twig to float its density has to be less than the density of water