Turtle hatchling survivorship rate is low in many turtle species due to predatio

Question

Turtle hatchling survivorship rate is low in many turtle species due to predation. Amanda researched the predatory rate on a species of turtle eggs in the Red River. The eggs were harvested from trapped turtles cloaca film (reproductive discharge) was either washed off or left on once gathered. Research suggests that predators use the female's cloaca scent to locate the eggs. The eggs were only handled when gloves and then reburied along islands where the turtles were trapped. The nests were monitored and manually on foot and data on nest predation were recorded. a. Based on the experimental design, what is the dependent variable? b. Based on the experimental design, what is the independent variable? c. Based on the experimental design, what is the control? Salt is often used to melt ice on roads during the winter because it lowers the freezing/melting point of water. When salt dissolves in water, individual Na^+ and Cl^- ions break away from the salt lattice and surrounded by water molecules. Why would this cause ice to melt?

Explanation / Answer

Answer:

1)

2) Salt is often used to melt ice on roads. Why would this cause ice to melt?

The freezing point of water is 0°C or 32°F. When salt is added it breaks into Na+ and Cl- ions. When this compound is added to water it lowers its freezing point through a process called as freezing point depression which is a colligative property of solution. When salt is added to water, the melting point can be depressed as the free flowing molecules that organize in the form of crystal structure are disrupted by addition of salt.

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