Investigating the effect of temperature and

For 45oC the maximum difference between the results is 4.

Urban heat island

Trees absorb carbon dioxide and provide shade. By contrast, a system with steady inflows and outflows i. This is where the enzymes have the maximum amount of kinetic energy, therefore the active site and substrate will collide more, with more energy forming the product GP at the fastest possible rate.

They then examine the system in detail while treating the effects of things outside the boundary as either forces acting on the system or flows of matter and energy across it—for example, the gravitational force due to Earth on a book lying on a table or the carbon dioxide expelled by an organism.

Higher wind speeds in rural areas, particularly in winter, can also function to make them cooler than urban areas. Teaching notes The quantities used should take approximately 4 minutes to change from pink to white at normal laboratory temperature.

The distance of lamp to the experiment was not kept as constant as it could have. This will cause reactions to speed up, hence the graph increases rapidly.

Temperature of the water Carbon dioxide concentration. Wear eye protection, as iodine may irritate eyes. When the surface water cools again in the fall to about the same temperature as the lower water, the stratification is lost and the wind can turbulently mix the two water masses together because their densities are so similar fall turnover.

On graph 2 the curve of best-fit peaks at 43oC, where the average rate of oxygen released is UHIs have the potential to directly influence the health and welfare of urban residents. A study shows that having contact with nature helps promote our health and well-being.

This is because during the 5 minutes the elodea was left, the temperature often drifted from what was needed. Asphalt built-up roofs BURby comparison, reflect 6 percent to 26 percent of solar radiation.

Investigating effect of temperature on the activity of lipase

A repeating pattern of cyclic change—such as the moon orbiting Earth—can also be seen as a stable situation, even though it is clearly not static. A system can be stable on a small time scale, but on a larger time scale it may be seen to be changing. Such laws of conservation provide limits on what can occur in a system, whether human built or natural.

As a result, new parts with the desired properties, possibly made of new materials, can be designed and fabricated.

Image B is a thermal infrared image of same area, showing hot red and yellow and cool green and blue spots.

The Greenhouse Effect

These two show slightly different diurnal and seasonal variability and have different causes [16] Diurnal behavior[ edit ] The IPCC stated that "it is well-known that compared to non-urban areas urban heat islands raise night-time temperatures more than daytime temperatures.

Seattle has correspondingly produced a "score sheet" for cities to use in their city planning. This is because on many occasions the bubbles did not show as one continuous bubble, but in fact many small ones. Investigation b Place single drops of iodine solution in rows on the tile.

Flows, Cycles, and Conservation One of the great achievements of science is the recognition that, in any system, certain conserved quantities can change only through transfers into or out of the system.Global area-averaged lower tropospheric temperature anomalies (departures from year calendar monthly means, ).

The month centered average is meant to give an indication of the lower frequency variations in the data; the choice of 13 months is somewhat arbitrary an odd number of months allows centered plotting on months with no time lag between the two plotted time series. Class practical Measure the time taken for amylase to completely break down starch, by withdrawing samples at 10 second intervals and noting the time at which the solution no longer gives a blue-black colour with iodine solution (but the iodine solution remains orange).

Use buffers to. A variable that is hard to control is the effect of temperature as the lights used may heat the water. LED lamps produce less heat.

You can develop more accurate measures by collecting the gas produced and measuring the volume of gas produced each minute (or over longer time periods).

An urban heat island (UHI) is an urban area or metropolitan area that is significantly warmer than its surrounding rural areas due to human activities. The temperature difference usually is larger at night than during the day, and is most apparent when winds are weak.

UHI is most noticeable during the summer and main cause of the urban heat island effect is from the modification of. Temperature is also important because of its influence on water chemistry. The rate of chemical reactions generally increases at higher temperature, which in turn affects biological activity.

The average temperature registered in the incubator for the experimental group was °C, and the average air humidity was percent. After 30 days, none of the tubes with the cylinders showed microbial growth.

Investigating the effect of temperature and
Rated 5/5 based on 5 review