Question

grade 7 topic about pure substance​

Answer 1

Answer:

pure substances are sugar, salt

Explanation:

pure substances are substances which are same size and equally distributed are known as pure substances

Answer 2

Answer:

Pure substance - Any single type of material that is made of only one type of atom or only one type of molecule. b. Mixture - material made up of two or more substances that are physically mixed but not chemically combined. ... Heterogeneous mixture - made up of different substances that are stay physically separate.