| A | B |
|---|
| Atoms of sulfur by themselves |  |
| Sulfur by itself is a(n) _________. | element |
| Atoms of iron and sulfur mixed together and shook in a test tube. |  |
| What kind of a change occurs when the iron and sulfur are mixed together? | physical |
| When iron and sulfur combined physically, the combination is called a ____________. | mixture |
| If 5 grams of iron and 5 grams of sulfur are combined, what is the mass? | 10 grams |
| When heat is added to the combination of sulfur and iron in the test tube, it becomes black with shiny crystals and is no longer magnetic. What kind of change has occurred? | chemical change |
| The particle model that represents a chemical change. |  |
| Iron and sulfur chemically combined are called iron sulfide. Iron sulfide is a ____________. | compound |
| Which of the following is NOT an element? carbon, sugar, oxygen, sulfur | sugar |
| Which of the following is NOT an element? copper, water, iron, hydrogen | water |
| What are the building blocks of matter? | atoms |
| How many different kinds of atoms are there in the universe? | 119 |
| Which is a mixture? sugar, air, carbon, carbon dioxide | air |
Which model correctly show the particles that make up air?,  |  |
Water has a chemical formula of H2O. Which is the correct model?,  |  |
Acetic acid, commonly known as vinegar, has how many oxygen atoms?,  | 2 |
Ethanol, a substance made from corn, has how many hydrogen atoms?,  | 6 |
