(b) Mean temperatures are rising in many parts of the world. The rising temperatures may result in physiological and ecological effects on living organisms. Describe and explain these effects. Topic areas for assessment of scientific content: (1) principle of destabilising effect of rising temperature on metabolic systems within organisms and on balance in ecosystems. (P) (2) effect on rate of diffusion/gaseous exchange; possible consequences, e.g.
Explain the effect that the flow tube radius change had on flow rate. How well did the results compare with your prediction? The increase of flow tube radius increased the flow rate, as predicted. 3. Describe the effect that radius changes have on the laminar flow of a fluid.
I will be covering the aspects, causes and effects of Global Warming. There are many definitions of Global Warming. One of these is that “ Global warming refers to an average increase in the Earth's temperature, which in turn causes changes in climate.”(EPA) The temperature increase can lead to changes in the average rainfall results, the sea levels can rise, and it may have many impacts on wildlife, plants of humans. The Global Warming is mainly cause by humans. The Green House Effects is one of the main causes of this warming.
Today, climate change is being driven by the addition of carbon dioxide and other greenhouse gases to the earth's atmosphere at rates faster than the planet's normal mechanisms can adjust to. The result is increasing concentrations of these gases in the atmosphere, and because they trap heat, increasing temperatures. This hurts people, animals, and plants. How do we know this? Scientists predict that if the increase in greenhouse gas emissions continues unabated, temperatures will rise by as much as 10 degrees Fahrenheit by the end of this century, potentially causing dramatic and irreversible changes to the climate.
This single metabolic fact accounts for the profound changes in not only respiration, but also in cardiac and circulatory physiology during exercise. Increased oxygen supply is provided by increases in both arterial oxygen delivery and tissue oxygen extraction; at the same time there is increased carbon dioxide transport on the venous side. The need for increased gas exchange by exercising muscles leads to the following general physiologic
Your body’s need for oxygen will increase. As the demand increases, your breathing rate will increase as your body attempts to exercise efficiently and provide a reasonable amount of oxygen to cells. The cardiovascular system will also adjust to provide energy and remove wastes including carbon dioxide from
Hypothesis With increasing temperature of sodium thiosulphate the reaction rate will increase as well. Justification As the collision theory states for a chemical reaction to occur particles need to collide at a certain speed and angle. Increasing the temperature gives particles more energy, so they move faster. As they move faster more collisions happen, hence more successful collision, which increases the rate of the reaction1. Materials> Hydrochloric acid HCl(l)> Sodium triosulphate Na2S2O3(l)> 250 ml3 beaker> 50 ml3 conical flask> 2 x 25 ml3 measuring cylinder> Thermometer> Stop clock> Tea kettle> Blank card> Pen Variables Reaction time is the dependent variable, as it depends on the temperature of the solution.
Hypothesis When the light is at a closer distance to the Elodea plant, the amount of oxygen bubbles produced in 2 minutes will increase displaying the high rate of photosynthesis. Light is required in order for the process of photosynthesis to function correctly, therefore the higher the light intensity then the rate of photosynthesis will increase too. Variables Independent Variables | The independent variable will be the distance that the light is away from the Elodea plant since this needs to be changed to impact the dependant variable. | Dependant Variables | The
Expansion, an increase in the volume of a substance, usually due to the addition of heat to the substance. The heat causes the molecules of the substance to move farther apart, making the substance occupy more space. A loss of heat causes the opposite effect, known as contraction. Although most substances expand when heated, not all expand at the same rate. Aluminum, for example, expands twice as much as iron when both are heated the same amount.
Substances undergoing net diffusion are said to move down or with their concentration gradient. After time (dependant on the substance) the substance will become evenly distributed. This is what’s known as equilibrium, although random kinetic motion continues, there’s no further net diffusion. Certain attributes can affect diffusion, such as heat, this will make diffusion occur more rapidly due to transferring more energy to the molecules to move around faster. Also a larger concentration gradient produces a faster diffusion, and smaller molecules diffuse more rapidly than larger molecules.