Ap Biology Lab

The soap is thick and the penny is rough. The tap water latest longer than the soapy water

Observation: no bugs were found except small, black, gnats were all close to the ground.

Please answer these questions then place them in the drop box for this lab. Use Microsoft word if possible.

Generally, people water their plants with 100% H2O—no solutes added. What sort of environment does this create around the roots of the plant?

The Earth is a huge planet this is covered by 70 percent water. Astonishingly from this 70 percent the human population can only use 1 percent of the world’s water the rest of it is salt water, frozen, or in some way unattainable (Santa Clara Valley Water District, 2016). Humans have found many different ways to obtain this 1 percent of fresh water they need, but the techniques vary depending on location. In San Jose, California we obtain our water from 3 major sources: groundwater, imported surface water, and local mountain surface water. These 3 sources contribute different amounts of water to the San Jose community. Imported surface water composes about 50 percent of our water supply, while ground water composes roughly 40 percent, and local mountain surface water composes approximately 10 percent (Santa Jose Water Company, 2016). However, these percentages can change due to factors such as weather and global warming.

Plant cells react differently to osmosis than animal cells. When an animal cell is placed in a hypertonic solution, water will leave the cell causing it to shrink, this is known as crenation. When a plant cell is placed in a hypertonic solution the cell membrane will pull away from the cell wall, making the plant flaccid, this is known as plasmolysis. When an animal cell is placed in a hypotonic solution, water will rush in to the cell, causing it to swell and sometimes burst. A plant cell placed in a hypotonic solution will also swell due to water rushing in, but will resist rupturing due to the rigid cell wall. Plant cells become more rigid in a hypotonic solution.

I know that osmosis will occur in the vegetables, but I am not sure of

High concentrations of minerals in soil can cause discolored leaves and stunted growth. Watering with distilled water, which has the recommended amount of indoor plant fertilizer added, provides an appropriate level of minerals. Distilled water is better than tap water for growing healthy plants. Tap water has additives like fluoride and chlorine that can affect a plant's growth.A study by the University Of Saskatchewan's Department of Plant Sciences on the effects of tap water on plant growth showed that tap water exposes plants to harmful substances like salt, magnesium and calcium. Distilled water, on the other hand, is processed by boiling the water into vapor to remove all impurities and then recondensing it to be bottled. Although distilled water comes at a premium, it is much better for the plants than what comes out of a kitchen faucet.Store-bought bottles labeled as "mineral water" may contain from 1,000 to 3,000 parts per million dissolved solids. Watering plants with such mineral-rich water will very quickly create a mineral build-up in the

Water availability of both surface and ground water has become a major problem due to high demand. On average, 320 gallons of water are used per day by each household in America, 30 percent of which is used outdoors (EPA, 2015). In Florida alone, total water withdrawals are expected to increase by almost 21 percent by the year 2030 (Water use trends in Florida, 2014). I believe the high volume of water being used is not the sole issue; it is the source of our water as well as our water management practices. Some experts estimate that as much as 50 percent of water used for outdoor irrigation is lost through evaporation (EPA, 2015). This loss of water happens when plants or grasses are watered at certain times during the day and is a direct result of Florida’s water mismanagement. Commercial and residential vegetation has been watered too often and at the wrong times for far too long and it needs to stop unless we want to see our aquifers dry up entirely.

Water is essential to food security. Food production to a great extend is depending on water. Water can be a great use of irrigation to the agriculture. Not only for the food crop, non-food crop like cotton and rubber also count on water in order for its growth. About 70% of freshwater are now for irrigation use. “According to the united nations, 1.2 billion people already live in areas experiencing a lack of physical access to water.” (purt, 2013)

To begin with, before I started my experiment I had to make a hypothesis on what I thought was going to occur .I thought that the food dye would only make a difference on the water.I also thought that if the water would change color as it would only make it vibrant.I thought that since it was vibrant It could be used as a decoration for your room or for any other occasion.

Water is naturally occurring, water is essential to life and every activity carried out requires water. Friis (2012) reported that humans can only survive approximately one week without water, with the average daily consumption about 2.5 liters and overall daily usage about 400 liters (Friis, 2012). Water is employed for a variety of reasons, ranging from domestic to agricultural, to industrial, to thermoelectric and so much more. Two sources of water were identified by Kenny et al. (2009) of the United States Geographical Survey (USGS), they include; surface water and groundwater, both fresh and saline. According to Kenny et al. (2009) of the USGS, water supplies and their uses are affected by factors such as demographics, economic trends, legal decisions, and climatic fluctuations. For this paper, I will focus on irrigation, one of the ways which water is used.

Those three experiments showed that the way onion cells are dealing with the movement of water in and out of the cell is by osmosis. That Osmosis is the diffusion of water across a membrane into a solution having a greater solute concentration. The cell

Scientists and researchers have stated that fresh water resources are running low worldwide, and are only expected to worsen over time as the population increases (Pearce, 2007), (Browns, Amazon books). Given the current trends of resource depletion and population increase, as much as two thirds of the world population in 2025 may be subject to moderate-to-high water stress, where only a small fraction of available renewable fresh water, less than 0.01 percent, is readily obtainable for the direct human use (United Nations, 1997a).

Thorough research on this task was used by investigating 14 different sites. These ranged between obtaining definitions for hypotonic, hypertonic and istonic; researching osmosis in food processes, finding out more about chemiosmosis, the pros and cons / advantages and disadvantages of reverse osmosis, it’s application and process. The idea behind the research was to prepare adequately before doing the experiment and also to help understand the results and outcomes of the experiment and the techniques used.