Three groups of materials are given below Group 1: wood – rock – rubber Group 2: iron – copper – gold Group 3: glass – clear water – air Identify and explain properties which are common for all members of each group.

Three groups of materials are given below Group 1: wood – rock –

1.	Three groups of materials are given below Group 1: wood – rock – rubber Group 2: iron – copper – gold Group 3: glass – clear water – air Identify and explain properties which are common for all members of each group.
Answer» GROUP 1 -EXPLANATION: