Gravity is the force that attracts matter together (Northwestern). When an object is under the influence of gravity it is referred to as a free fall object. Two things that always remain true about free fall objects on earth are their acceleration is always at 9.8 m/s/s and they never encounter air resistance. It is…
Purpose: To separate DNA molecules according to their size. This can be done for forensic purposes, to look for disease in specific genes or paternity testing. Brief overview: DNA is negatively charged, in order to separate it by size it is put in a solution with a current running through it that pulls the negatively…
What gas was produced by the breakdown of hydrogen peroxide? Oxygen gas was produced. Describe the test that was performed in order to identify the gas. A glowing splint of a match was lit, blown out then inserted into the test tube. The match relighting in the test tube indicates oxygen gas is present. Can…
Objective: In this lab, we will perform the catalyzed decomposition of hydrogen peroxide under various conditions. We will record the trials using a gas pressure sensor in a lab quest and analyze graphs of the data. From this analysis, we will determine the rate constant, the activation energy and the rate law for the reaction.…
Current global population and impact of growing population in developing countries As global populations expand and shift, the healthcare sector is coming under increased pressure. In the developed world, aging populations and extended life expectancy have led to an increasing prevalence of chronic, expensive to treat diseases and disabilities and a growing shortage of healthcare…
In New Guinea, an amazing rainforest arises. 0.5% of the Earth’s surface. New Guinea rainforest has immense biodiversity, containing between 5-10% of total species on Earth. Some plants in New Guinea are more than 100,000,000 years old. The lowland rainforests need 2,500 mm of rain each year. Some species like the lowland forests, for birds,…
Definition of Biodiversity Biological diversity – or biodiversity – is the term given to the variety of life on Earth. It is the variety within and between all species of plants, animals and micro-organisms and the ecosystems within which they live and interact. 5 ways humans have affected biodiversity: 1) Clearing land for building. 2)…
The purpose of this experiment is to discover the reaction rate in which acid rain weathers marble statues, or in our case, marble chips. Introduction Marble is especially sensitive to the degrading by acidic chemicals, also to weathering. Acid rain is one of the top degradation agents for marble artifacts around the world. Acid rain…
DNA extraction/Separation is the first step in the genetic engineering process. This is accomplished by taking a sample containing the gene of interest (the Bacillus thuringiensis ) and taking it through a series of steps that separate the DNA from the other parts of a cell. During DNA extraction, all of the DNA from the organism is extracted at once.…
Areas situated in the zone between the Tropics of Cancer and Capricorn are naturally prone to these natural disasters. In this region, it is more likely for the high temperature of the ocean to cause water to evaporate. In order for a cyclone to form, it is required to have two main factors in the…
-A species of organism that can indicate an area of pollution by its presences or absence in that specific area. Lichen – How does it indicate air pollution? Lichen is a moss like plant that grows on exposed areas such as on rocks and on trees. Lichen relies on nutrients that it absorbs from rainwater…
On a clear sunny day, the sky above us looks bright blue. Why is the sky blue? To answer these questions, we must learn about light, and the Earth’s atmosphere. THE ATMOSPHERE The atmosphere is the mixture of gas molecules and other materials surrounding the earth. It is made mostly of the gases nitrogen (78%),…
The pattern that one must consume fuels and dirtily provide energy and power has failed. Applying it has caused and it cannot solve the increasing world energy crisis. Most energy is presently obtained by “dirty methods”. Hence as energy production increases so do harmful combustion of by-products. And if this method continues to be used,…
Hypothesis If the change in temperature is greater when the water is heated with the use of the fire caught by the food substance, then the energy content in the food substance is higher because the heat energy is greater, since the heat energy is absorbed by the water when the fire is kept under…
Political Subsidies and mandatory blending have created an artificially rapid growth in biofuel production, worsening some negative impacts. Existing policies have had a limited effect in achieving energy security and climate change mitigation and therefore need to be reviewed. Government incentives and support for biofuels have been largely guided by national or regional interests rather than a more global perspective. There is…
Biofuel is a form of recycled fuel, produced from biomass or waste generated by the use of organic material which may be any substance including vegetable and animal products like grass, trees, plant parts and plants in the ocean. Biomass can produce liquid and gaseous fuels, which can do almost everything that fossil fuels do.…
Aim: Investigate any one of the factors affecting the rate of heat loss in a liquid. Introduction: Heat is a form of energy that flows due to a temperature difference. Heat transfer is a process in which energy in the form of heat energy is exchanged between the materials which are at a different temperature.…
Purpose: Find crystallization temperatures for 7 concentrations of KNO3 and make a solubility graph Materials: KNO3, test tube, stir rod, weigh boats, hot plates, thermometer, 10 mL graduated cylinder. Procedure: -In two test tubes, put exactly 5 mL water in each -Put assigned amount KNO3 in each -Heat in hot water bath until dissolved- you…
Purpose: Find silver produced and compare to predicted. Cu + 2AgNo3 → Cu(NO3)2 + 2Ag Procedure: -in small beaker (100-250 mL), weigh beaker -Add 3.00 OR LESS of AgNo3, weigh AgNo3 -Weigh copper penny -Add 80 mL H2O -Heat and dissolve (warm, not boil) -Put copper penny into AgNo3(aq) –observe -Allow to sit overnight…
Description Barn owls live in many parts of the world. Their upper body is covered in grey feathers, dark, ribbon lines and pale spots. An owl’s lower body consists of white with several black marks, just like a Dalmatian! Their faces are heart-shaped and white with brown edges. The eyes of a barn owl are…