Ordinary level 2024 Littoral mock Economics 1 & 2 mark guide

Ordinary level 2024 Littoral mock Economics 1 & 2 mark guide

Ordinary level 2024 Littoral mock Economics 1 & 2 mark guide

Paper II: Structural questions
1. a) i. It is the study of rocks. (1mark)
ii. Branch of geology that studies water bodies. (1mark)
b) i. crust, mantle, and core. (0.5×3=1.5marks)
ii) Crust = Silicon and aluminum (SIAL), and Silicon and Magnesium (SIMA); Mantle = Iron and Magnesium
(FeMg); Core = Iron and Nickel (FeNi) (0.5×3=1.5)
iii. – Comet is composed of gas, dust and ice while Asteroid is composed of rocks and metals (2marks)
c) i. The Earth crust is made up of large rigid blocks (lithosphere) which are constantly floating on a semi
fluid/plastic substratum (asthenosphere) (2marks)
ii. Matching coast lines; fossil evidence; palaeoclimatic evidence; etc (choose any one) (1mark)
2. a) i. sudden trembling/vibration of the Earth crust. (1mark)
ii. An instrument used to record seismic waves. (1mark)
iii. Amount of damage/destruction caused by an earthquake.(1mark)
b) i. In a sequence of undisturbed rock strata, the oldest bed lies at the bottom, subsequently followed by
younger rocks as we move towards the top. (1mark)
ii. A structure cutting through a feature is younger than the feature through which it cuts. (1mark)
c) i. Stress is the force