If you water plants and then put them in the sun, what will happen to the water?
This allows students to focus on the process and techniques of investigation and the subsequent reporting. However, in Year 12 students are Leaf and highest transpiration rates given freedom to choose a topic or research question from the work covered over the whole of the course.
These "Open Inquiry" EEIs may provide more ownership, engagement and deeper understanding for the students but do place a bigger demand on resources and laboratory management.
However, many teachers have found strategies to manage this should they choose to opt for a Open EEIs. A Materials Requisition Form accompanies this document.
My thanks to Biology teachers from Nanango for sharing this. Examples of Risk Assessment forms can be found in the tasks available on this page. A comprehensive form developed over several years by Urangan SHS can be found here: It is only an example and should not be assumed to necessarily meet the legal and safety obligations of any particular school or situation.
The method of artificial variation: The method of concomitant variation: This is also called a "correlation method". You can think that nature has manipulated the variables but it is still appropriate to class one as dependent and one as independent.
For example, do young leaves have the same density and distribution of stomata as older leaves; or how does temperature IV in a natural environment affect stoma opening DV?
In this second case you do not need you to control the environmental temperature, but you do need to measure the DV at different temperatures. The difficulty with the second approach is the control of other potentially influential variables such as humidity - as you have to take what you get.
However, that does not preclude the variables in relationship being considered the IV and DV or being graphed as such. One way to address the confounding variables eg humidity is to collect data on the other variable as well.
You can run the statistics on each pair separately, but, for students who are not that "stats-savvy" then they could look for interactions between them at a visual level. Food, as well as meeting the nutritional requirements of humans, will also meet the nutritional needs of a vast range of micro-organisms.
These microbes will multiply rapidly in food, given the appropriate conditions such as temperature, pH and moisture. The flavour, aroma and texture will ultimately be affected.
Those most affected by food poisoning are the elderly, the young and immune suppressed individuals.
A petri dish culture of the yeastlike organism fungus Candida krusei, after 10 days growth on dextrose agar. This species is known to be a food spoilage organism. Dichloran Rose Bengal Chloramphenicol Agar is a commercially specialist culture medium for viable yeasts and moulds in food products.
It incorporates Rose Bengal, which both helps limit colony size and is selective against bacteria. Effects of different anti microbials on bacterial growth Joseph Lister first introduced aseptic surgery in when he used a spray of carbolic acid phenol C6H5OH as a germicide. Since then the control of growth by antimicrobial compounds has grown into a multi-billion dollar industry.
A good EEI is to assess the effect of a variety of antimicrobial disinfectants on bacterial growth. Our labbies prepare the plates and order in E. Small paper discs like out of a hole punch are sterilised and then soaked into different anti-microbials.
The discs are placed onto the agar plates and then into the incubator for a couple of days. If the anti bacterial is effective there is a clear ring around the disc where the E.When stomata are open, transpiration rates increase; when they are closed, transpiration rates decrease.
Boundary layer – The boundary layer is a thin layer of still air hugging the surface of the leaf. Staking and Pruning. Most commercial determinate tomatoes are produced using short stake culture for trellising. This type of culture produces fruits that are higher in . Transpiration increased linearly with increased leaf N in both CO 2 levels in well-watered conditions, but the rates of increase were not parallel.
The equations describing transpiration rates (mg H 2 O m −2 sec −1) and leaf N (g m −2) are as follows. So Here is a List of 20 Different Food Types That We Can Add to Our Diet.
The magnitude of the decrease in transpiration depends on the plant's root and leaf characteristics. The decrease in transpiration by phreatophytes, such as saltcedar, cottonwoods, bermuda grass, and alfalfa, typically is slight because they are deep rooted and obtain their water from near the water table rather than from the overlying soil zone.
Another significant effect of RH on transpiration is the rate of transpiration and the magnitude of water loss. At 50% RH, the DPD of the atmosphere is about bars, while the DPD of the leaf cells is just about 40 bars or less than that.