Question

name josiah pollock 9/10/25 chemistry i worksheet classification of matter and changes instructions write e in the blank if the material is heterogeneous or o if it is homogeneous. 1. wood 2. freshly-brewed black coffee 3. water 4. lody creams® 5. salt 6. dirt 7. sausage-and-mushroom pizza 8. air 9. milk 10. gold

Explanation:

To solve this, we classify each substance as heterogeneous (E) or homogeneous (O) by checking if it has a uniform composition.

1. Blood

Blood has cells and plasma, non - uniform. So it's heterogeneous (E).

2. Freshly - brewed black coffee

Coffee is a uniform mixture of coffee solutes and water. So it's homogeneous (O).

3. Water

Pure water has a uniform composition. So it's homogeneous (O).

4. Lody Creams (assuming it's a heterogeneous cream with different components)

It likely has non - uniform components. So it's heterogeneous (E).

5. Salt (assuming pure salt, like NaCl)

Pure salt has a uniform composition. So it's homogeneous (O).

6. Dirt

Dirt has various particles, non - uniform. So it's heterogeneous (E).

7. Sausage - and - mushroom pizza

Pizza has different toppings and dough, non - uniform. So it's heterogeneous (E).

8. Air

Air is a uniform mixture of gases. So it's homogeneous (O).

9. Milk

Milk has fat globules and other components, but overall a relatively uniform mixture (colloidal). So it's homogeneous (O) (or can be considered heterogeneous in some detailed views, but generally taken as homogeneous for basic classification).

10. Gold (pure gold)

Pure gold has a uniform composition. So it's homogeneous (O).

Answer:

s:

1. E
2. O
3. O
4. E
5. O
6. E
7. E
8. O
9. O
10. O