Pure substances are made up of a single elements or compounds

This is true because they are made up from both.

question1

1,000 tons

question2

3: 8

question 3

store d

step-by-step explanation:

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.