Formation Of Rocks
Muhtasari
The ground beneath your feet is not as still as it looks. Granite kitchen worktops, the slate on a roof, the limestone in a cathedral and the marble of a statue all began as something else and were made over by heat, pressure, water and time. Geologists group every rock on Earth into just three families, and each family tells the story of how it was born. Learn to read those stories and you can pick up almost any rock and say where it came from.
In this lesson you will see how igneous, sedimentary and metamorphic rocks form, and how the rock cycle links all three so that one rock type can slowly become another. You will also meet permeability, the property that decides whether water soaks through a rock or runs off it. These ideas underpin everything that follows in this unit, from where we mine metals to where groundwater is stored.
Malengo
- 1.1.1 Describe the formation of named igneous, sedimentary and metamorphic rocks, limited to: (a) igneous: granite and basalt (b) sedimentary: limestone, sandstone and shale (c) metamorphic: marble and slate.
- 1.1.2 Describe and interpret the rock cycle, limited to: (a) weathering (b) erosion (c) transportation (d) sedimentation (e) compaction (f) cementation (g) crystallisation (h) deposition.
- 1.1.3 Define permeability as the ability of water to pass through the pore spaces of rock and soil.
- 1.1.4 Classify rocks as permeable and impermeable, limited to: (a) permeable: most sedimentary rocks (limestone and sandstone) (b) impermeable: igneous, metamorphic and some sedimentary rocks (shale).
Maelezo ya Somo
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Tathmini ya Somo
Hongera kwa kukamilisha somo la Formation Of Rocks. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- Which rock type is formed when molten magma cools and solidifies? A. Sedimentary B. Metamorphic C. Igneous D. Fossil Answer: C
- A rock contains visible large crystals and no layers. It most likely formed by: A. Rapid cooling of lava at the surface B. Slow cooling of magma underground C. Compaction of sediment D. Heat and pressure on shale Answer: B
- Which of the following is an impermeable sedimentary rock? A. Limestone B. Sandstone C. Shale D. Granite Answer: C
- Limestone is changed into marble by: A. Weathering and erosion B. Compaction and cementation C. Heat and pressure D. Melting and crystallisation Answer: C
- Permeability is best defined as the ability of: A. A rock to resist scratching B. Water to pass through the pore spaces of a rock C. A rock to contain fossils D. Crystals to form on cooling Answer: B
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Vitabu Vinavyopendekezwa
Fanya Mazoezi ya Maswali ya Majaribio
Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Formation Of Rocks? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
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