NST1502 Assignment 3 2023 Answers, guidelines, workings and references. ................................................. QUESTION 1 Define the following terms: 1.1 Planet 1.2 Oort cloud 1.3 Solar system 1.4 Galaxy 1.5 The moon 1.6 Atmosphere 1.7 Earth 1.8 Lithosphere 1.9 A star 1.10 Universe [20] QUESTION 2 2.1 Differentiate between revolution and rotation. (2) 2.2 When considering revolution and rotation, which one creates day and night, and which one creates the seasons? (2) 2.3 Use the difference mentioned in 2.1 above to outline the effects of revolution and those of the rotation. (2) 2.4 What is a light year and how many astronomical units (AUs) make a light year? (2) 2.5 How many light years is our planet Earth away from the sun? (2) [10] 18 QUESTION 3 3.1 What is the Goldilocks zone? (2) 3.2 Which other planets are closer to the Goldilocks zone? (2) 3.3 What are exoplanets? (2) 3.4 Explain what the Milky Way is. (1) 3.5 How many planets do we have? (1) 3.6 Which planet is closest to the sun? (1) 3.7 Which planet is furthest from the sun? (1) [10] QUESTION 4 4.1 Use a diagram to differentiate between a plant cell and an animal cell. (10) 4.2 Plants alternate between diploid-cell plants and haploid-cell plants. This is called the alternation of generations. Use a diagram to illustrate the steps of the alternation of generations in fern plants. (10) [20] QUESTION 5 5.1 Define biodiversity. (2) 5.2 State two unique characteristics of the following organisms: (8) a. protists b. plants c. fungi d. animals NST1502/101 19 5.3 Match the terms given in column A with their definitions given in column B and in the spaces given below the table: (10) Column A Column B a. Mosses i. Vascular tissue that transports water and dissolves minerals b. Pollen ii. Carry messages from the senses to the central nervous system. c. Xylem iii. Small, seedless plants with no vascular system d. Epithelial tissue iv. Immature male gametophytes that can be transported to female gametophytes by wind or animals e. Sensory neurons v. Line the outer surfaces of organs and blood vessels throughout the body, as well as the inner surfaces of cavities in many internal organs. i_______________, ii________________, iii___________________ iv______________, v________________ [20] QUESTION 6 6.1 Write a two-page essay about the history of mining in South Africa. [20]
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