Practice worksheet on rocks and minerals with questions and activities.

Let’s go through each part of the worksheet step by step.

---

Part 1: TRUE or FALSE?

a. Fossils are minerals.
→ Fossils are remains or traces of ancient living things (like bones, shells, footprints). Minerals are naturally occurring inorganic solids with a specific chemical structure. So fossils are NOT minerals.
✔ FALSE

b. Rocks are clusters of minerals and other inorganic materials.
→ Yes! Rocks are made up of one or more minerals, plus sometimes glass or organic material — but mostly inorganic. This is correct.
✔ TRUE

c. Minerals are structured crystals that have specific chemical components.
→ Exactly! Minerals have a definite chemical composition and an ordered internal structure (crystal lattice).
✔ TRUE

d. We classify minerals according to the biological composition.
→ No! Minerals are classified by their *chemical* composition and crystal structure — not biological. “Biological” refers to living things, which minerals are not.
✔ FALSE

---

Part 2: Match to make true sentences

We need to pair each letter on the left with the correct phrase on the right.

Left side:
- a. Pure minerals
- b. An example
- c. Oxides
- d. Rubies

Right side options:
- are mixtures of metals and oxygen that vary in hardness and colour.
- are called elements.
- of mineral is quartz.
- are used in jewelry and belong to the category of oxides.

Let’s match logically:

→ “Pure minerals” → These are substances made of only one type of atom — so they’re called elements.
✔ a → “are called elements.”

→ “An example” → We say “an example of mineral is quartz.” That makes sense.
✔ b → “of mineral is quartz.”

→ “Oxides” → These are compounds where metal + oxygen combine. They can vary in color/hardness.
✔ c → “are mixtures of metals and oxygen that vary in hardness and colour.”

→ “Rubies” → Rubies are gemstones used in jewelry, and chemically they are aluminum oxide — so they’re oxides.
✔ d → “are used in jewelry and belong to the category of oxides.”

---

Part 3: Choose the correct option about uses of rocks and minerals

Options given: Glass / Marble / Marble and Granite

First sentence:
“__________ are some common rocks that are used for making statues.”
→ Statues are often carved from soft, beautiful stone like Marble. Granite is too hard for fine carving usually.
✔ Marble

Second sentence:
“__________ is a manufactured material made from quartz sand.”
→ Glass is made by melting silica (quartz sand) with other stuff.
✔ Glass

Third sentence:
“__________ is used on counter tops in kitchens, on floors and around doors and windows.”
→ Both marble and granite are used for countertops and flooring. But granite is harder and more durable for high-use areas like kitchen counters. The option says “Marble and Granite” — so that fits best here.
✔ Marble and Granite

---

Final Answer:

1. True or False:
a. FALSE
b. TRUE
c. TRUE
d. FALSE

2. Matching:
a → are called elements.
b → of mineral is quartz.
c → are mixtures of metals and oxygen that vary in hardness and colour.
d → are used in jewelry and belong to the category of oxides.

3. Uses of rocks and minerals:
- Marble are some common rocks that are used for making statues.
- Glass is a manufactured material made from quartz sand.
- Marble and Granite is used on counter tops in kitchens, on floors and around doors and windows.