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3 years ago

Define the following terms Uniformitarianism & trace fossil

2 answers:

8 0

Uniformitarianism: the theory that changes in the earth's crust during geological history have resulted from the action of continuous and uniform processes.

Trace fossil: a fossil of a footprint, trail, burrow, or other trace of an animal rather than of the animal itself

AnnZ [28]3 years ago

4 0

Answer:

Uniformitarianism- A theory that geologic process that occur today are similar to those that have occurred in the past

Trace Fossil- A fossil of a foot or trail or other travel of an animal rather than of the animal itself

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3 years ago

A sailor on a trans-Pacific solo voyage notices one day that if he puts 735.mL of fresh water into a plastic cup weighing 25.0g,

Gennadij [26K]

Answer:

Amount of salt in 1 L seawater = 34 g

Explanation:

According to Archimedes' principle, mass of freshwater and cup = mass of equal volume of seawater

mass of freshwater = density * volume

1 cm³ = 1 mL

mass of freshwater = 0.999 g/cm³ * 735 cm³ = 734.265 g

mass of freshwater + cup = 734.265 + 25 = 759.265 g

Therefore, mass of equal volume of seawater = 759.265 g

Volume of seawater displaced = 735 mL = 0.735 L (assuming the cup volume is negligible)

1 liter = 1000 cm³ = 1000 mL;

Density of seawater = mass / volume

Density of seawater = 759.265 g / 0.735 L = 1033.01 g/L

Density of freshwater in g/L = 0.999 g/ (1/1000) L = 999 g/L

mass of 1 Liter seawater = 1033.01 g

mass of 1 Liter freshwater = 999 g

mass of salt dissolved in 1 L of seawater = 1033.01 g - 999 g = 34.01 g

Therefore, amount of salt in 1 L seawater = 34 g

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3 years ago