This physics problem tests your understanding of fundamental physical laws and their applications. The step-by-step solution below breaks down the problem using relevant equations and physical reasoning.
ScanSolve AI Answer
(a) (i) A rock is a naturally occurring aggregate of one or more minerals. (ii) Granite Gabbro (b) (i) Mechanically formed sedimentary rocks Step 1: Physical/mechanical weathering breaks down pre-existing rocks into fragments. Step 2: Fragments are transported by agents such as running water, wind or ice. Step 3: Fragments are deposited when transporting agent loses energy (e.g. in lakes, deserts). Step 4: Sediments undergo compaction under weight of overlying materials. Step 5: Cementation occurs as minerals from water precipitate between fragments, binding them together. (ii) Organically formed sedimentary rocks Step 1: Remains of plants and animals (e.g. shells, coral) accumulate in layers. Step 2: The remains undergo partial decay. Step 3: Layers are compacted by weight of overlying materials. Step 4: Cementation binds the remains together into solid rock. (c) Characteristics of rocks studied within the local environment (e.g. volcanic rocks in Rift Valley): Dark coloured Contain vesicles (gas bubbles) Fine to medium grain size Interbedded with ash layers (d) (i) Three methods: 1. Field observation and sketching 2. Collection and examination of hand specimens 3. Microscopic examination of thin sections (ii) Three problems: 1. Rocks may be weathered and altered 2. Some sites may be inaccessible 3. Lack of suitable equipment (e) (i) Two economic uses: 1. Source of building materials (e.g. limestone, sandstone) 2. Source of metals (e.g. iron ore from haematite) (ii) Body waves Surface waves (f) (i) Two ways: 1. Richter scale - measures magnitude/energy released at source (logarithmic scale). 2. Mercalli scale - measures intensity/effects on surface (I to XII scale based on damage observed).