My class can not be a representation of the larger school because my class consists of people of the same age bracket and the same level of study.
<h3>What is a representative population?</h3>
A representative population is a population that reflects the whole. A sample must be taken in such a way that it can effectively reflect the components of the whole.
My class can not be a representation of the larger school because my class consists of people of the same age bracket and the same level of study. The school is composed of different classes occupid by students of different age groups and different levels of study.
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Because enzymes connect to their substrate through a lock-and-key system, where the shape of the substrate and the enzyme has to fit like puzzle pieces. Then only the enzymatic reaction can occur.
When bacteria decompose, they leave behind nutrients. These nutrient then filter unto the roots of the plants via the water that it sucks up. A loss in certain nutrients could be the death of this plant.
Ok, a few things here:
This is an egg drop experiment, so I'm assuming you are testing out different ways of protecting the egg.
The independent variable is what you want to change: This would be the type of protection you have on the egg
The dependent variable is what would be effected by the changes in the independent variable: which would be something like the integrity of the egg after it hits the ground. You'd have to measure that somehow.
There are two types of controlled variables: <em>Internal and External.</em>
Internal variables are within the scope of the experiment and can be controlled, whereas external variables are outside the scope of the experiment and we have no control over them.
Internal:
- Height of the drop
- Type of egg
- Person dropping
- How the egg is dropped
- Surface being dropped on to
External:
- The person designated to drop the egg is sick
- You run out of eggs to drop
- Somebody loses all the planning for the experiment
- The weather forces you to do the experiment inside versus outside
- The wind blows your egg off course, leading to it hitting the ground at an angle
So, the way your teacher "chucks" the eggs off the roof should be a controlled internal variable. The action should be done as consistently as possible to avoid an uncontrolled variable.
