NOS Variables
What is the Independent Variable?
The variable the experimenter changes
The variable that is different between groups.
Identify the independent variable in this experiment?
Mary and John want to test the effects of acid rain on plant growth. They have 4 groups of plants and they give each group a different amount of acid rain. Each group gets the same type of acid rain, the same type of soil, and the same type of plant.They water the groups twice a week every for 8 weeks. At the end of each week they measure the plant heights.
The IV= different amount of acid rain
What are the three parts of cell theory?
1) All living things are made of cells
2) Cells are the basic unit of structure and function
3) All cells come from pre-existing cells
What type of infectious agent has a cell with a cell wall but NO nucleus?
A BACTERIA
Why do scientists use the classification system?
To help identify how closely organisms are related
What is the dependent variable?
The variable that "Depends" on the independent variable.
This is the Data that is collected. The output variable.
Identify the dependent variable in the experiment below:
Mary and John want to test the effects of acid rain on plant growth. They have 4 groups of plants and they give each group a different amount of acid rain. Each group gets the same type of acid rain, the same type of soil, and the same type of plant.They water the groups twice a week every for 8 weeks. At the end of each week they measure the plant heights.
The DV = plant height
True/False:
A cell in a lab can grow and divide to make more cells
True
All cells come from pre-existing cells
What type of infectious agent is considered to be non living?
A VIRUS
What is the pneumonic device used to help students remember the correct order of classification?
King Phillip Came Over For Good Spaghetti (Soup)
All things that are kept the same in an experiment.
Identify the Independent variable below:
Ms. Tyson is testing her hypothesis that candy will make her students get higher test grades. She offers half of her students a bag of candy if they get an A or B on the test. She doesn't offer the other half of the students any candy. The students all have the same teacher, the same class, and will take the same test.
The IV = whether or not the students were offered candy
True/False:
All living organisms are either single celled or multi -cellular
True
All living things are made up of cells
What type of Infectious agent is multi-cellular?
FUNGI
What is the difference between Eukaryotes and Prokaryotes?
Eukaryotes have nuclei and prokaryotes do not
Identify the constants in this experiment:
Mary and John want to test the effects of acid rain on plant growth. They have 4 groups of plants and they give each group a different amount of acid rain. Each group gets the same type of acid rain, the same type of soil, and the same type of plant.They water the groups twice a week every for 8 weeks. At the end of each week they measure the plant heights.
The constants are= type of acid rain, type of soil, and type of plant
Identify the Depend variable in the experiment:
Ms. Tyson is testing her hypothesis that candy will make her students get higher test grades. She offers half of her students a bag of candy if they get an A or B on the test. She doesn't offer the other half of the students any candy. The students all have the same teacher, the same class, and will take the same test.
The DV = test grade
What is the concept of spontaneous generation?
Scientists used to think that cells would randomly be created from nowhere.
What type of infectious agent do Vaccines help prevent?
Viruses
Organisms in a family are more related than organisms in a Kingdom
True!
Kingdom, Phylum, Class, Order, Family, Genus, Species
Identify the constants in the following experiment:
Ms. Tyson is testing her hypothesis that candy will make her students get higher test grades. She offers half of her students a bag of candy if they get an A or B on the test. She doesn't offer the other half of the students any candy. The students all have the same teacher, the same class, and will take the same test.
The constants = same teacher, same class, same test
What is the difference between replication and repetition?
Repetition: A scientist repeating their own experiment to check for error
Replication: A scientist re-doing another scientist's experiment to check for error
What part of the cell theory replaced the idea of spontaneous generation?
All cells come from pre-existing cells.
What type of infectious agent is ONLY treated by antibiotics?
bacteria
If two organisms are really similar and have the same foot shape, which classification group do you think they belong to?
a) Kingdom c) genus
b) Family d) phylum
c) Genus