C. Ice is less dense than water which means water condenses when it freezes allowing the ice in a lake to float on top of the water preventing the water below from freezing.
1.A control group is important to an experiment because it allows you to eliminate and isolate those variables.
2. Controlling variables is important because slight variations to the experiment set up could affect the outcome significantly
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The right approaches to population monitoring methods of swallows and tortoises are point counts and line-transect distance sampling, respectively.
- For point counts, In order to collect the data required to meet the current study's objectives, one must use field techniques methods for selection, counting, capturing, observing, measuring, and marking individuals chosen from the targeted population.
- To count or keep track of the birds of the air, point counts are a frequent field technique (birds).
- The practice involves making observations over a predetermined, set amount of time and keeping track of the number of birds coming from a specific location.
- While the line-transect distance sampling methods in the field are useful for keeping track of the number of tortoises and is appropriate for controlling and tracking the population.
learn more about population monitoring methods here: brainly.com/question/12682497
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