1. It is estimated that uranium is relatively common in the earth’s crust‚ occurring in amounts of 4 g/metric ton. A metric ton is 1000 kg. At this concentration‚ what mass of uranium is present in 1.0 mg of the earth’s crust? a) 4 nanograms b) 4 micrograms c) 4 milligrams d) 4 × 10–5 g e) 4 centigrams Ans: a) 4 nanograms Page: 1.3‚6 2. In 1928‚ 1.0 g of a new element was isolated from 660 kg of the ore molybdenite
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The future is among us or shall I say the imitation of God’s power is. Putting this into perspective imagine that you’re a soldier on a battlefield and you’ve been shot but nothing vital has been damaged‚ but one of your major arteries has been nicked. Without getting medical attention the possibility of you dying from blood loss is at a high. The estimated time of death is 20 minutes and the drive to the emergency room is 25. From surveys of hospitals from all over the US is has been proven that
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- ECTOTHERMS are organisms that have a limited ability to control their body temperature. Their cellular activities generate little heat. Their body temperatures rise and fall with ambient temperature changes. Most organisms are ectotherms. Examples are plants‚ all invertebrates‚ fish‚ amphibians and reptiles - ENDOTHERMS are organisms whose metabolism generates enough heat to maintain an internal temperature independent of the ambient temperature. Examples are birds and mammals - EXTENSION (Not
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Red Kangaroo: Macropus Rufus The Kangaroo is an endotherm. Endotherms generate heat from their body’s metabolism. So their internal body temperature is independent of the external temperature. Endotherms eat more food than ectotherms. This higher food intake results in an increased level of metabolism‚ which is required to produce heat. The Red Kangaroo inhabits inland plains throughout Australia. They prefer open plains where trees and bushes are scarce. The fur on Kangaroos maintains an insulating
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Activity A: Body temperature Get the Gizmo ready: • If necessary‚ click Reset ( ). Question: What factors increase or decrease body temperature? 1. Observe: With the Air temp. at 0 °C (32 °F) and Body temp. at 37 °C (99 °F)‚ click Play ( ). After one simulated hour (does not have to be exact)‚ click Pause ( ). What is the body temperature after one hour? ____________________________________ 2. Gather data: Fill in the first line of the data table below. Then‚ use the same
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Hypothalamus The hypothalamus may be very small‚ but it plays a very important role. The hypothalamus is about the size of a pearl‚ and it weighs about four grams in a brain that weighs on average about 1‚400 grams. It directs so many important functions for the body some examples of what it controls are Autonomic function control ‚ endocrine function control‚ Homeostasis‚ motor function control‚ food and water intake‚ body temperature‚ and the release of 8 major hormones. The hypothalamus
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VITAL SIGNS NUR 102 What are Vital Signs? • Temperature • Pulse • Respirations • Blood Pressure • Pain (considered the 5th vital sign) When to measure vital signs? • On admission to health care facility • In a hospital on regular hosp schedule or as MD ordered (q8hours‚ q4 hours‚ etc) • Before and after procedures (surgery‚ invasive diagnostic procedures) • Before‚ during‚ and after blood transfusions • When patient’s general condition changes (nursing judgment) GUIDELINES FOR ASSESSMENT
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Australian ectotherms and endotherms A- TYPES OF TEMPERATURE REGULATION 1- The cat‚ human and platypus could be described as true endotherms‚ as they all maintain a relatively constant internal body temperature that is independent of the external temperature. As the environmental temperature rises from 5C to 40C‚ the humans body temperature remains constant‚ the cat’s and the platypus’ increases by around 3▫C. 2- The lizard and echidna are ectotherms as their body temperature fluctuates according
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"Ergonomics" is the discipline that examines the capabilities and limitations of people. The term ergonomics is based on the two Greek word "ergon" and "nomos"‚ which together mean "the laws of work". In terms of design‚ the focus of ergonomics is man; and it aims to design appliances‚ technical system and tasks in a way to improve human safety‚ health‚ comfort and performance. Also‚ it makes products easy to be used. In the following paragraphs‚ I will discuss a number of factors including: the
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CURRICULAR LESSONS Life Sciences Activities For students who are visually impaired in the science classroom: Life Cycle of Frogs‚ Dragonflies and Butterflies Overview In this lesson‚ students learn the concept of metamorphosis in an organism’s life cycle by studying the growth and development of butterflies‚ frogs‚ and dragonflies. Objectives • Understand that all animals have a life cycle that includes being born‚ developing into an adult‚ reproducing‚ and eventually dying • Understand
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