Use what you have learned about celestial navigation to determine your latitude and longitude using the following data: • The date is June 21(this datum gives you the Sun's declination)

• The altitude of the Sun at solar noon is 35.5 degrees and it is in the southern sky (This allows you to calculate zenith distance and using the Sun's declination the latitude of the vessel)

• Your chronometer set for Greenwich (0 degrees) registers the time of solar noon to be 5:00 pm ( 5 hours later than solar noon at Greenwich - use this to calculate longitude keeping in mind the Earth rotates 15 degrees per hour from West to East)

What is your latitude and longitude?

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

here's your answer.

estuaries are the partially enclosed coastal bodies of brackish water formed at the mouth of sea where river meets an ocean. it is a transition zone between river and sea water so estuaries are influenced to both marine environment such as tides, waves and to riverine such as flow of fresh water and sediments. the mixing of sea and fresh water provide high level of nutrients, making estuaries a high product habitats.

many estuaries suffers degradation from a variety of human activities like erosion from deforestation, overgrazing, overfishing, drainage and eutrophication.

so from the above statement answers will be

1. false as estuaries are formed due to both brackish and freshwater.

2.true, due to high productivity estuaries are breeding ground for many marine species.

3. direct and indirect activities of man that contribute to pollution and deposition of sediments.