chapter 18 review\ntrue/false\nwrite true if the statement is true. if the statement is false, change the…
chapter 18 review\ntrue/false\nwrite true if the statement is true. if the statement is false, change the underlined word to make it true.\n1. hematite is an ore that is a source of iron.\n2. nonmetals are minerals that are widely used.\n3. gold can be called a mineral because it is ductile and malleable.\n4. subsurface mining uses open - pit mines to obtain minerals.\n5. parent rock is the rock from which soil forms.\n6. the subsoil in a mature soil profile is the most fertile layer of soil.\n7. loam is a type of soil with an even mixture of differently sized particles.\n8. grasslands have thicker soil profiles than deserts and tundras.
Answer
Brief Explanations:
- Hematite is an iron - ore source, so true.
- Non - metals are not minerals in the same sense as metal - containing minerals, but they are widely used, so true.
- Gold is a precious metal and is considered a mineral due to its natural occurrence and chemical composition, so true.
- Open - pit mines are used in surface mining, not subsurface mining, so false.
- Parent rock is the source of soil formation, so true.
- The topsoil, not subsoil, is the most fertile layer, so false.
- Loam has an even mixture of differently sized particles, so true.
- Grasslands have thicker soil profiles than deserts and tundras due to more organic matter accumulation, so true.
Answer:
- True
- True
- True
- False
- True
- False
- True
- True