Constructing an Hypothesis statement-How to set it up by ilo32820

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```									Biology                                                    Ecocolumn Project

Constructing an Hypothesis statement-How to set it up:
The “IF..and..then..” format

Causal question/Purpose

What is the effect of excess product X
on field, garden and woods
ecosystems ?

Proposed Explanation-Hypothesis, pt 1

If….    Product X is harmful only to weeds

Planned test-hypothesis, pt 2

and….   it is added in normal vs. excess amounts
to 2 different ecocolumns

Expected result-hypothesis, pt 3

then…    the column with excess product X
should have more weeds killed than the one with
normal amounts; in the control all weeds should
survive and in neither experimental column should
there be any other adverse effects on other plants. All
the animals should live in all 3 columns.
Biology                                                   Ecocolumn Project

(The following are examples of what might be seen at the end of the
experiment)
Observed Results/Analysis

All plant types wilted in the excess column and
all ants died. Only weeds died in the normal column
and all ants died. In the control, all plants lived and no ants
died.

Conclusion-
restate the “then” part of the hypothesis with the final answer

Excess of product X is harmful to all plant types, not
just weeds. Product X is harmful to ants even when
used as directed. Product X, used as directed, will not
hurt other plants.
Biology                                                         Ecocolumn Project

Sample Hypotheses

Read each of the following hypotheses – which one is the best wording to use
based on the following problem being investigated: How does wind effect
transpiration rates in begonias? What attributes make it the best choice? What is
wrong with each of the other ones?

Hypothesis A: The amount of air movement around begonias influences
transpiration.

Hypothesis B: I think that more wind will make plants lose water faster.

Hypothesis C: Faster winds hurt begonias.

Hypothesis D: If faster winds cause greater transpiration rates, and begonias are
exposed to various speeds, then begonias exposed to faster wind will lose water
faster than those exposed to lower winds.

Hypothesis E: If it is windy, begonias will be okay because they are exposed to
wind all the time.

Hypothesis F. Transpiration rates will not have an effect on the growth of
begonias.

Hypothesis G: If there are faster winds and begonias are exposed to them, then
the begonias will lose leaves and they won’t be able to evaporate water as much.

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