view_agenda
Questions
Find the perfect question by filtering through every previous QCAA Earth & Environmental Science external exam question
notifications
Question Classifications
We’re conducting a final review of the classifications and formatting for our recently onboarded questions. If you have any feedback, please share it with us here.
QUESTION 2 As a method of resource extraction stoping would be best used for (A) an evenly distributed low concentration gold deposit at a depth of 50 to 500 m. (B) base metals in a massive deposit at a depth greater than 500 m. (C) apetroleum reservoir in an anticlinal trap at 500 m depth. (D) high concentration mineral sand deposits at 500 m depth.
QUESTION 12 Which of the following best describes the ore separation process used in this flotation machine? Ore slurry input at Air pumped in at Tailings exit at Il Il
QUESTION 1 Which properties would the fraction labelled X on the diagram exhibit? (A) high viscosity and low volatility (B) low volatility and a low boiling point (C) high flammability and high volatility (D) low flammability and a high boiling point
QUESTION 1 (6 marks) Describe each separation process and identify an ore used and the mineral extracted. a) Milling [3 marks] b) Sluicing [3 marks]
QUESTION 2 Stoping is the process of extracting an ore or mineral (A) found close to the Earth’s surface. (B) from the bottom of an artificial pond. (C) from an underground mine leaving behind an open space. (D) across a horizontal plane creating arrays with natural supporting columns.
QUESTION 14 Fracking causes gas to be released after (A) drilling into rock and exposing layers to intense heat. (B) injecting water sand and chemicals into rock layers. (C) injecting hot water into soft shale reserves. (D) drilling into subsurface gas reserves.
QUESTION 6 (14 marks) This question refers to Stimulus 5 in the stimulus book. a) Determine a site for a new coal mine in the area. Justify the location of the mine using three pieces of evidence and a method of extraction. [6 marks] b) Describe the impact of the mine on the hydrosphere geosphere biosphere and atmosphere and their associated environmental monitoring strategies. [8 marks]
QUESTION 1 Sluicing separates metallic resources based on (A) solubility. (B) melting point. (C) specific gravity. (D) hydrophobic properties.
QUESTION 22 (9 marks) a) Identify three steps involved in separating iron metal from iron ore. [3 marks] b) Explain the separation processes identified in Question 22a) referring to the properties of iron or iron ore. [6 marks]
QUESTION 6 (18 marks) Refer to Stimulus 6 in the stimulus book. a) Determine the financial value of the sample for all metals recoverable at the optimal pH for iron extraction. Show your working. The mining company decides to minimise its costs by extracting only two metals. b) Determine an alternative pH to maximise the financial value of the sample for two recoverable metals. Show your working. c) Which pH should the company use to process the sample? Justify your response. [8 marks] [8 marks] [2 marks]
QUESTION 6 The froth flotation process involves (A) creating bubbles to which wanted material adheres. (B) adding surfactants to achieve a hydrophilic surface charge. (C) aerating the slurry to create a froth that contains unwanted material. (D) adding a slurry of fine powder and water to allow clay particles to be separated.
QUESTION 8 The following diagram represents a cross-section from an area explored for coal. Soil: Alluvium Coal Shale Conglomerate Sandstone Limestone Which of the following extraction processes would be used to remove coal in the area between points X and Y on the diagram? (A) fracking (B) onshore drilling (C) open-cut mining (D) underground mining
No results found