The Scientific Method
What is the first step in the Scientific Method?
Define a problem
What makes a good experiment “verifiable and repeatable”?
Following clear procedures; can be repeated
What does it mean to classify objects?
Organizing or grouping objects based on similarities
What does pH measure?
The measure of acidity or alkalinity in a substance
Why is pH important for plant producers?
To help plants absorb nutrients properly
What do we call a statement that can be tested to explain how something works?
A hypothesis
What is the control in an experiment?
The element that stays the same and isn’t affected by variables
What tool helps scientists identify organisms through a series of choices?
A dichotomous key
What pH value is considered neutral?
7.0
How does soil pH affect plant growth?
It affects nutrient availability in soil
What is the purpose of doing background research?
To better understand the problem or question
What is the difference between an independent and dependent variable?
Independent = cause; Dependent = effect
How many choices are there at each step in a dichotomous key?
Two choices per step
What term describes a substance with a pH below 7.0?
Acidic or acid
Why do animal producers care about pH?
It affects digestion and nutrient absorption
What step comes after analyzing the results?
Communicate the conclusion
Give an example of qualitative data.
Descriptions or observations (e.g., color, texture, behavior)
What does each step in a dichotomous key do?
Narrows down the selection or leads to the correct name
How much more acidic is a pH of 5 than a pH of 7?
100 times more acidic
How do agricultural scientists use pH knowledge?
They use it to preserve food and maintain quality
What are two ways scientists can communicate their conclusions?
Graphs, charts, reports, or presentations
Give an example of quantitative data.
Numbers or measurements (e.g., height, time, temperature)
What are two ways objects can be grouped when classifying?
Grouping and ordering objects or sorting by similar characteristics
What is a buffer and what does it do?
A chemical that neutralizes acids or bases in a solution
Name two ways science helps improve agriculture overall.
Increases crop yield, food quality, and sustainability