Rocks and Soil Quiz - ICSE Class 6 Chemistry
Free practice quiz: Rocks and Soil (ICSE Class 6 Chemistry). 47 multiple-choice questions with answers and explanations. Play online, no sign-up needed.
Play all 47 questions freeSample questions
Which type of rock is formed from the cooling and solidification of molten rock (magma or lava)?
- Sedimentary rock
- Metamorphic rock
- Igneous rock
- Fossiliferous rock
Show answer
Answer: C. Igneous rock
Igneous rocks are formed when molten rock cools and solidifies. This molten rock can be magma (below the Earth's surface) or lava (on the Earth's surface).
The different horizontal layers of soil, characterized by distinct physical and chemical properties, are called:
- Bedrock
- Sediments
- Soil horizons
- Parent material
Show answer
Answer: C. Soil horizons
Soil horizons are distinct layers that form in a soil profile as a result of soil-forming processes. These layers are typically labeled O, A, E, B, C, and R.
Slate is a metamorphic rock formed from which parent rock?
- Granite
- Shale
- Sandstone
- Conglomerate
Show answer
Answer: B. Shale
Slate is a low-grade metamorphic rock formed from shale, a fine-grained sedimentary rock, under relatively low temperatures and pressures.
What is the primary weathering process that causes iron-rich minerals in rocks to rust?
- Hydrolysis
- Carbonation
- Oxidation
- Dissolution
Show answer
Answer: C. Oxidation
Oxidation is a chemical weathering process where minerals react with oxygen, often in the presence of water. This is responsible for the rusting of iron-bearing minerals, turning them reddish-brown.
A rock that has been changed in form by intense heat and pressure without melting is:
- Igneous
- Sedimentary
- Metamorphic
- Volcanic
Show answer
Answer: C. Metamorphic
Metamorphic rocks are formed when existing rocks are transformed by heat, pressure, or chemical reactions, altering their mineral composition and texture.