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Inside our latest issue: Quest Vol. 17 No.2

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Features

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Science in the News

Essential facts about Covid-19 booklet launched

July 31, 2021

This booklet is based squarely on the contextual exploration of a multi-sided topic that is affecting every one of us, the great Covid-19 pandemic of

Ocean acidification

July 29, 2021

Carla Edworthy tells us about the threat to the world’s marine environment and research advances in South Africa. Read more

Sinkholes, springs, and early shelters

July 26, 2021

Nick Baglow and Ponani Mthembi explain their acid connection Read more

Acid rain

July 23, 2021

Quest explores how it became a catalyst forglobal cooperation in tackling environmental issues Read more

Southern Cape Streams

July 21, 2021

Chris Curtis reports on the Garden Route’s naturally acidic black and white streams. Read more

Acid Mine Drainage

July 20, 2021

Mauro Lourenco tells us about acid mine drainage,and the secondary impacts associated with its treatment. To read more click here

Puzzle

1. What is the way of gauging the acidity and alkalinity of a solution?

2. Adding an acid to water decreases the

3. Calcium Carbonate

4. Leaders in the acedophilic organism on earth

5. AMD is short for Acid.......Drainage

6. The .......water streams are recognised for their endemic acid tolerant fauna?

7. Which province in South Africa has over 80 of coalfired power stations?

8. The maximum amount of acid deposition that ecosystems can tolerate without being damaged is known as .....load.

9. bluegreen algae is also know as?

10. Areas underlain by carbonates are often described as having a .......... landform

11. What is considered as a master variable affecting numerous chemical and biological processes with the soil?

12. Soil ........is adversely affected by acidification

13. What gas is continuously released by humans to the atmosphere that is altering the chemistry of the ocean?

14. bacteria present in both modern humans and Neanderthals

15. the sticky film that constantly forms on teeth but can be removed by brushing and flossing

16. Group name for sharks and rays within the cartilaginous group

17. The natural acidic environment in the human an organ

18. The gramnegative spiral bacterium, Helicobacter pylari, is the causative agent of chronic....

19. One word used to describe organisms adapted to live in acidic environments.

20. What is the colour of ferric oxide?

21. The high density sludge is designated to the raise the pH of acidic mine water so that ....... metals precipitate out.

X

Congratulations on completing this crossword puzzle correctly!!!!

View our latest issue here

Editor's Note

Acid: The bottom end of the scale

Our cover photo shows a couple canoeing on the Touws River, having paddled upstream from the Ebb and
Flow Rest Camp in the Wilderness section of the Garden Route National Park. The Touws River is one of the blackwater systems of the southern Cape, with dark, naturally acidic waters due to the presence of plant-derived humic acids and the influence

Isihloko salesiqephu se Quest simayelana ne asidi. Sigxila kwizindawo ezine asidi ngokwemvelo noma ngenxa yomshikashika wabantu.
Translated by Zamantimande Kunene

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Valuable lessons from chapter 7
1. Coronaviruses, first discovered in the 1960s, are found in birds and mammals
2. SARS-CoV-2 is a large RNA virus and appears to have an effective repair system..
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Valuable take-home points from chapter 6:
1. Difference between pandemic and epidemic.
2. Difference between prokaryotes and viruses.
3. The relationship between a virus and RNA or DNA.
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In Conversation with @LeeRberger sharing his experiences and reflections on how they worked in the pandemic environment as a paleoanthropologist with @HSoodyall the @ASSAf_Official EO.
@dsigovza @DBE_SA @NRF_SAASTA @SAASTEC1 @Wits_News @SANSA7

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