Soil
Rocks
Variables
Nutrients
Vocabulary
100
What are our components of soil?
Gravel
Humus
Sand
Clay
100
How does rock become soil?
Weathering → Breaking down of rocks/minerals and organic materials through contact with water / atmosphere / organisms
100
A controlled variable is..
A variable that is kept the same or constant
100
Why do plants need Phosphorus?
Phosphorus is needed for plant energy storage.
100
What is a proposed explanation based on limited evidence, serving as the starting point for further investigation (an educated guess).
A Hypothesis
200
What does weathering do to rocks?
It breaks them down through contact with water
200
A dependent variable is...
The variable observed (quantitatively or qualitatively) during an experiment to record the influence of the independent variable.
200
Why do plants need Nitrogen?
Nitrogen is needed for the formation of plant protein.
Fosters growth
200
Humus
A component of soil formed by the decomposition of leaves and other organic matter.
300
The white rock is harder than the black rock because the white rock left a scratch on the black rock.
300
An independent variable is...
The variable adjusted by the experimenter to measure its affect on the dependent variable for an experiment.
300
Why do plants need potassium?
Potassium is needed to improve plant growth and for plant disease resistance.
300
Justify
To explain, prove, or provide a good reason for.
400
How is soil produced?
Soil is produced when rock is weathered and mixed with decaying organic matter
400
The black rock would make the best soil because the black rock is softer and will weather faster than the white rock.
400
Amari believes that giving scholars extra time for recess will increase scholar work ethic.
What is the IV?
What is the DV?
IV: Extra time for recess
DV: Scholar work ethic
400
If a plant does not have enough of a nutrient, the plant would be considered nutrient __________.
Deficient
400
Quantitative Data
Numerical information gathered with instruments (rulers, scales, cylinders, beakers).
500
Give two reasons why studying soil is important
1) So that we can understand how soil filters water
2) So that we can grow healthy plants/crops for food
500
Do experiments with multiple independent variables yield usable data? Why or why not?
No because you wont be able to tell which variable caused the results.
500
What does it mean when a plant has a sufficient amount of nutrients.
The plant has as much of the nutrient that is needed
500
Non-numerical information gathered with the five senses (sight, smell, touch, hearing, taste).
Qualitative Data