Question 1: Identify the substance type shown below.

Question 2: What type of substance is shown?

Question 3: Classify this substance.

Question 4: Identify this mixture type.

Question 5: Draw a diagram showing a mixture containing elements AND compounds.

[This is a Paper 4 extended response question]

Question 6: Define the term element.

Question 7: Define the term compound.

Question 8: Define the term mixture.

Question 9: State TWO differences between a compound and a mixture.

Question 10: Give an example of:

Question 11: A mixture contains iron filings and sulfur powder.

(a) Explain how you could separate the iron from this mixture.

(b) State why this method works.

Question 12: When iron and sulfur are heated together, they react to form iron sulfide (FeS).

(a) Can you use a magnet to separate iron from iron sulfide? Explain your answer.

(b) Is iron sulfide a mixture or a compound?

Question 13: A student has a mixture of sand and salt.

Describe a method to separate this mixture and obtain pure samples of both sand and salt.

Question 14: State whether each of the following methods separates a mixture by CHEMICAL or PHYSICAL means:

Question 15: Explain why air is classified as a mixture and NOT a compound.