The theory helps to explain the factors that affect the rates of chemical change. "[1] But not all collisions between molecules lead to a reaction. ... Catalysts Catalysts are chemicals that speed up a chemical reaction but are not used up. Catalysts increase the rate of reaction because it provides an alternative route for the reaction by lowering the activation energy needed. ... Recording the mass of the reaction at regular intervals of 30 or 60 seconds: The rate of reaction for this method can be expressed by the rate of loss in mass from the flask, which is proportional to g/min based ...

• Word Count: 3666
• Approx Pages: 15
• Has Bibliography
• Grade Level: High School

Important Facts the smallest unit of life is the cell instructions for development are contained in DNA collectively, all of the chemical processes in a cell are called metabolism producers often obtain energy from the sun homeostasis refers to the ability to maintain a constant internal environment cells in domains archaea and eubacteria lack nucleii plants are multicellular producers an educated guess might be called a hypothesis science is based on evidence philosophy is not a step in the scientific method an atom is the smallest unit of substance that retains the properties of the subst...

• Word Count: 10700
• Approx Pages: 43
• Grade Level: High School

The Nobel Prize in Chemistry, 2000: Conductive polymers Contents Prize motivation 1 Conductive polymers - a surprising discovery 1 What is electrical conductivity? 2 What makes a material conductive? 3 Conductive polymers - the story 4 Applications of conductive polymers 5 Synthesis and p...

• Word Count: 6720
• Approx Pages: 27
• Grade Level: High School

The bacterium naturally does this to force the plants to produce the particular chemicals it needs to survive. ... More and more genetically modified foods are being produced, often with good intentions, but frequently with harmful reactions and results. ... Such supplement-enriched crops could certainly bring immediate benefits to developing countries, despite the possibility of some unfavorable long-term human reactions to the genetically modified substances. ... Farmers typically use tons of chemical pesticides annually. ... Growing GM foods such as Bt corn, which harms insect predators...

• Word Count: 3593
• Approx Pages: 14
• Grade Level: Undergraduate

When Carla, a twenty-six-year-old mother, experienced mild sadness after the birth of her first child, she thought nothing of it because she felt complete relief after several weeks; however after her second pregnancy she experienced a more severe form of unhappiness. Two months passed while Carla ...

• Word Count: 2986
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This acid is from reaction with alkaline chemicals, found in soils, lakes and stream, and can occasionally occur when a volcano erupts as well. ... The chemical reactions begin as energy from sunlight, in the form of photons, hit ozone molecules (O3) to form free oxygen (O2), as well as single reactive oxygen atoms (O). ... Also, the formation of nitric acid can trigger further reactions which release new hydroxyl radicals to generate more sulfuric acid. ... These include oxidation by products of alkene-ozone reactions, oxidation by reactions of NxOy species and oxidation by peroxy radicals. E...

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After weighing the sample was placed in a clean 150-250 ml beaker. 5.Put the sample and beaker in the fume hood then add approximately 15ml of the 12molar hydrochloric acid and 5ml of the 16molar nitric acid. 6.There will be a reaction as the acid is dissolving the metal shavings, after the solution stabilizes cover the beaker with a watchglass and then gently heat the solution on the hotplate for 20 minutes until the sample dissolves. ... Data&Calculations: Group A Sample .5318grams of steel shavings 200ml of solution=.2L .5318gsample/.200l=2.659*1000=2659ppm Al=.264/2659*100=.0099...

• Word Count: 2661
• Approx Pages: 11
• Grade Level: High School

A list of words was created from the categories of "four-footed animals" and "chemical elements." ... The reaction times of the responses and the accuracy of the responses was measured. ... The overall results of this study present a picture of how lists containing conceptually distinctive material are recalled. ...

• Word Count: 2838
• Approx Pages: 11
• Grade Level: High School

Publications like Frank Stilley's The $100,000 Rat and Other Animal Heroes for Human Health tend to paint a glowing picture of animal experimentation as untainted by inhumane practices and motivated by the pure selfless desire to better the human condition (Goodwin 217). ... In sum, animals resembled humans to varying degrees according to species and in relation to the system or type of reaction under investigation. ... Researchers can also set up a situation for testing some reaction where the immediate cause, relevant influences, and irrelevant or extraneous factor can be strictly cont...

• Word Count: 3007
• Approx Pages: 12
• Has Bibliography
• Grade Level: Undergraduate

The brain is affected by the diminished production of its chemical communicators, decreased circulation and less accurate sensory perception, so that it takes a little longer to process new information and react to different stimuli. ... A similar picture can occur after strokes. ... • The brain and central nervous system change with aging resulting in slowing the physical reactions. • There is a loss of strength and agility and slowing of reaction and response time. ...

• Word Count: 3030
• Approx Pages: 12
• Grade Level: High School

All the physical and chemical changes that occur in an organism is referred to as: metabolism catabolism homeostasis assimilation 11. ... Heat - form of energy - partly controls rate of metabolic reactions e. ... Define and locate the basement membrane on a picture. ... Be able to label a picture of the matrix. ...

• Word Count: 2878
• Approx Pages: 12
• Grade Level: High School

Tropical Rain Forests Weather and Climate 3:00-3:50 MWF Although a tropical rain forest is merely described as a region of tall trees with year-round warmth and plentiful rain, the definition goes much deeper. Tropical rain forests, jungles that receive at least eighty inches of rain in a year, main...

• Word Count: 3373
• Approx Pages: 13
• Has Bibliography

Debates over whether it was proteins or DNA that were the bearers of "genetic instruction" for human life, (even though DNA was located exclusively ON the chromosomes), kept the latter out of the picture until 1944 (DNA Watson). ...

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F.C.A.'s A. Thesis focus and topic sentences B. Integration of critical material C. Transitional elements D. Usage and mechanics to date. Twin Psychology The miracle of twins never ceases to amaze me. The concept of a life shared between two is almost incomprehensible. To have some one...

• Word Count: 3203
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Man, powered by his imagination and inquisitive character, has wondered he mechanisms of Nature since time infinite. This quest for the truth, the ways in which his surrounding works, has led to many a scientific discoveries and innovations. Since the art of making fire and creating handcrafted tool...

• Word Count: 3017
• Approx Pages: 12
• Grade Level: High School

Tropical Rain Forests Weather and Climate 3:00-3:50 MWF Although a tropical rain forest is merely described as a region of tall trees with year-round warmth and plentiful rain, the definition goes much deeper. Tropical rain forests, jungles that receive at least eighty inches of rain in a year, main...

• Word Count: 3257
• Approx Pages: 13
• Has Bibliography

Abortion has been an issue that has bothered me, ever since I moved to Texas. Texas being a conservative and pro-life have voiced out against the feticide and attacked abortion clinic and doctors. A friend of mine underwent an illegal abortion from fear of being kicked out of her church and family. ...

• Word Count: 2843
• Approx Pages: 11
• Grade Level: High School

Results from Ortigue's team revealed when a person falls in love, 12 areas of the brain work in tandem to release euphoria-inducing chemicals such as dopamine, oxytocin, adrenaline and vasopression. ... Consequently, according to Liebowitz, "as most adults feel some anxiety when separated from important figures in their lives, and some sense of increased security when their closest relationships seem stable ", attachment, as in the form of a human chemical bond, is mediated internally by the release of endorphins in the brain. ... In particular, this research has been helped by the use ...

• Word Count: 3859
• Approx Pages: 15
• Has Bibliography
• Grade Level: Undergraduate

They explain that 'while some of the reactions that follow vaccination may be caused by the vaccine, many are unrelated events that occur by coincidence after vaccinating. ... The chemical mixed with the weakened virus or bacteria in the vaccine could damage the body of the recipient rather than providing protection for it. ... Although there are many chemicals used in vaccines, they serve a purpose in the protection they give and the vaccines are tested many times to ensure the safety (14). ...

• Word Count: 6040
• Approx Pages: 24
• Has Bibliography
• Grade Level: Undergraduate

Upton Sinclair's novel the Jungle illustrates how greed and ruthless competition has made turn of the century America into a brutal jungle.Take or be taken? was the guiding rule, and everyone was someone else's prey. Those at the bottom of the economic ladder - wage earners and their families were at a particular disadvantage in the capitalist jungle.Workers were slaves to the whims of their masters, the capitalist who own and ran private industry. Many of the workers were immigrants ignorant of the language and ways of their new country were the most vulnerable members of this class...

• Word Count: 4457
• Approx Pages: 18
• Grade Level: High School

 MA Curating Contemporary Design 2014/15 Title: "If the curator's task is to medicate between art and its audience, does her task differ when she deals with decorative arts from what she does when dealing with fine art?" Submitted by: Liu Shengnan + K1153705 Submission date: 07/Jan/15. Tutor: Anthony Burton/Donna Loveday Word count: 6126 words Essay Outline Title If the curator's task is to medicate between art and its audience, does her task differ when she deals with decorative arts from what she does when dealing with fine art? Introduction The definit...

• Word Count: 6796
• Approx Pages: 27
• Grade Level: Undergraduate