Unit 2: 2.4

Question 1

Matter is classified as either ___________ (elements and compounds) or ___________

Answer 1

Pure substances (elements and compounds) or mixtures

Question 2

• variable composition
• composed of pure substances that are physically combined
• the components are only physically combined and retain their chemical and physical properties
• can be separated by physical methods

Answer 2

Mixtures

Question 3

Seperation based on boiling points

Answer 3

Distillation

Question 4

Seperation based on density

Answer 4

Centrifugation

Question 5

Pouring off the supernatant to leave the solid

Answer 5

Decanting

Question 6

Collecting a solid on filter paper as the filtrate passes through

Answer 6

Filtration