# EcoBeaker: Barnacles and Tides

In: Science

Submitted By xoxobritt33
Words 698
Pages 3
Exercise 1:
3.1 – Which barnacle species ranges into the warmest water? Chthamalus montagui
4.1 – On average, how many high and low tides will a given spot on the coast experience in a day, and why? A given spot on the coast will experience two high and two low tides each day. High tide occurs when the Moon and Earth are facing towards each other and away from each other. Low tide occurs when the Moon is facing the Earth at 90˚ and 270˚.
4.2 – What is spring tide and when does it occur? Spring tide is when the Earth, Moon and Sun are directly aligned. This occurs at new moon and full moon. The gravitational forces caused by the Sun are parallel to those of the moon. This creates a very high tide and a very low tide. This occurs about every two weeks.
4.3 – What is a neap tide and when does it occur? At half moon, the Moon and the Sun are at right angles from each other relative to the Earth. The gravitational pull of the Sun is perpendicular to that of the Moon and the ocean water is evenly distributed. This occurs about every two weeks.
6.1 – How many high and low tides are there each day? There are two high tide and two low tides each day.
7.1 – What is the height of each of the following in your study area?
Spring high tide: 4.7 m
Spring low tide: 0.5 m
Neap high tide: 3.5 m
Neap low tide: 2.0 m
7.2 – If you are an organism that must remain submerged at all times, what is your maximum height on the rock? Explain. If you must be submerged at all times, the maximum height the organism can live on the rock is 0.5 m. This is the lowest low tide that occurs and being at this level will ensure to obtain the most amount of water and the least amount of air.
7.3 – During approximately which days in the 14-day tide cycle do organisms living low on the rock experience their greatest potential exposure to air? Explain. At day 4...

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...SimBio Virtual Labs® EcoBeaker®: The Barnacle Zone NOTE TO STUDENTS: This workbook accompanies the SimBio Virtual Labs® The Barnacle Zone laboratory. Only registered subscribers are authorized to use this material. Laboratory subscriptions may not be shared or transferred. Student’s Name: _________________________________ Signature: __________________________________ Date: __________________________________ This and other SimBio Virtual Labs® are accessible through SimBio’s SimUText System®. . SimBio Virtual Labs®: EcoBeaker® The Barnacle Zone Background When we tell our kids about different species and where they live, we naturally start talking about weather and the physical environment. Camels are adapted to life in the desert and can go a long time without water. Polar bears live in the Arctic and are adapted to cold with their thick layers of insulation. A polar bear wouldn’t be very happy in the desert, and a camel would have a hard time in the Arctic (though a herd of camels pulling a sled over the ice is an amusing image). The underlying idea is that in order to be adapted to one environment, you necessarily give up the ability to live in other environments. But is this true for most species? Do species live where they do primarily because of their adaptations to the physical environment, or might the other species in the environment also be important? The intertidal zone of rocky coastlines makes an interesting natural laboratory in......

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