Question

Define the following
1)Magnetic substance
2). Grouping
3). Grouping of objects​

Answer 1

1.Explanation:Substances that are attracted by a magnet are called magnetic substances. Example: Iron, cobalt, nickel, etc. Substances that are not attracted by a magnet are called non-magnetic materials

2.the action of putting people or things in a group or groups.·

3.in category theory, a branch of mathematics, group objects are certain generalizations of groups that are built on more complicated structures than sets. A typical example of a group object is a topological group, a group whose underlying set is a topological space such that the group operations are continuous.

hope it helps you

Answer 2

Explanation:

Magnetic Materials

Those materials which are attracted b a magnet are magnetic materials. Iron, Nickel, and Cobalt are the magnetic substances as objects made up of these materials are attracted by a magnet. Also, magnetic materials can be magnetized or we can say that magnetic materials can be converted into magnets.

Grouping/Grouping of objects

Different materials have different characteristic properties. These properties include appearance, hardness, transparency and solubility. Appearance includes colour, lustre, texture and physical state. Materials can exist in solid, liquid or gaseous state.Grouping of objects together with similar properties is called sorting. The materials can be grouped on the basis of similarities or differences in their properties.

Grouping helps in gaining systematic knowledge of things. It also gives a general idea about all members of a group and the differences between members of different groups. It is convenient to work with all members of a group knowing their properties