Question

Read the following article describing a current marine issue.
Household vinegar advances the fight against crown of thorns starfish threat on Great Barrier Reef
ABC North Qld
By Kathleen Calderwood and Isobel Roe

Crown of thorns starfish (COTS) is a pest which eats coral tissues, posing a huge threat to the reef. Australian Institute of Marine Science research showed coral cover on surveyed reefs had declined by about 50% over the past 30 years, with COTS responsible for almost half of that decline. James Cook University scientist Lisa Boström-Einarsson searched for an eradication method for COTS that was cheap, easily available and safe for everything other than the starfish themselves. Her method involved injecting the COTS with 20 milliliters of household vinegar. The trial saw a 100% kill rate within 48 hours of injection. "I tried alcohol [first] and that did not work very well, and then I heard some rumors that some people had used vinegar but had not had very good results," Ms Boström-Einarsson said. "So I refined the methods a little bit and then it turned out to work really well." Ms Boström-Einarsson said the starfish were mostly water inside and could not tolerate the acidity of the vinegar. "The acid basically just melts their insides," she said. "It is quite dramatic the way they go and within 24 hours there is basically just slime left — it is not pretty."

Explain the scientific procedure followed in the article by describing the following:

State the problem
Identify a hypothesis from the article
Identify the procedures used in the experiment
Describe the results


Question 6(Multiple Choice Worth 2 points)

(01.01 MC)Scientists used trawling with nets to estimate the biomass of fish at different depths of the ocean. New evidence showed that some fish were able to avoid the nets, so the biomass estimates were inaccurate. When new evidence is discovered, what must scientists do next, and why?

Answer 1

1. The problem: THE DECLINING OF CORAL COVER OF REEFS.
Hypothesis: Vinegar can be used to kill crown of thorns star fish [COTS].
Procedure: The COTS were injected with 20 milliliters of household vinegar.
Result: All the COTS died within forty eight hours after they were injected.
2. When a new evidence is discovered, scientists ought to have an open mind about it and test it out to discover whether it is true or not. If the evidence is prove right, then necessary adjustments must be made to reflect the new evidence. This is very important because, science depend on continuous discovery.

Answer 2

Answer:

1234 steps

Explanation:

1. State the problem - COTS is a pest in which this one eats coral tissues, posing a huge threat to the reef. so a Marine Science research the situation and could find out that coral cover on surveyed reefs had declined by about 50% over the past 30 years, in which it was the COTS fault.

2. Identify a hypothesis from the article - If Lisa finds eradication method for COTS, then the COTS might start to die.

3. Identify the procedures used in the experiment - So lisa searched for an eradication method for COTS that was cheap, easy to find and safe for everything less the star fish, so she used alcohol and vinegar, it was something easy to find and cheap.

4. Describe the results - Lisa used first the alcohol but she saw that it did not work, so she heard so rumors that other people used vinegar but they has not good result, so lisa refined the methods a little bit and then it turned out to work really well, after all it get to the conclusion that start fish were mostly water inside so they could not tolerate the acidity of the vinegar, in which this get to kill the star, in 24 hr only slime left.