1. Hydrogen sulfide is colorless and highly poisonous. What happens when it oxidizes or combines with oxygen? It forms A. hydrogen sulphide C. sulfide B. sulfate D. sulfur dioxide

2. What do you call the collection of processes by which sulfur moves rocks water ways and living systems? A. Nitrogen Cycle C. Sulfur Cycle B. Phosphorus Cycle D. Water Cycle

3. How animals obtain sulfur? A. by eating plants C. both a and b B. by eating animals that have eaten plants D. None of the above

4. Sulfur readily combines with other elements. What is the product when sulfur combines with hydrogen? A. hydrogen sulfide C. sulfide B. sulfate D. sulfur dioxide

5. Plants use sulfur in form. A. hydrogen sulphide C. sulfide B. sulfate D. sulfur dioxide 6. How do sulfur compounds much​