Scientific Variables
Experimental & Control Groups
Analyzing Data
Bonus
100
The variable that is changed or manipulated in an experiment.
Independent Variable.
100
The group(s) that is not given the independent variable.
Control Group.
100
Make a claim. Hint: Which species is most vulnerable to extinction?
Javan Rhino
100
Make a claim about the data table. (Most powerful earthquakes in US history)
Alaska has had the majority of the most powerful earthquakes in US history.
200
The variable that is measured, observed, or recorded in an experiment.
Dependent Variable.
200
The group(s) that are standard, average, typical, recommended, regular, or normal.
Control group.
200
Which type of soil is best for plant growth? 
Nonsterilized soil
200
Make a claim about the data table
Pancreatic Cancer has the worst 5 year survival rate
Breast cancer has the most new cases
300
IDENTIFY THE INDEPENDENT VARIABLE: A nutritionist is conducting a study on the impact of various diets on weight loss. Participants are divided into four groups: Group A follows a low-carb diet, Group B follows their regular eating habits, Group C follows a balanced diet, and Group D follows a low-fat diet. The participants' weight changes are recorded over a period of six weeks.
DIET
300
The groups that receive the independent variable.
Experimental Groups.
300
What is the dependent and independent variable?
Dependent: Heart rate
Independent: Activity
300
Adam always listened to the crickets at night. He wondered why he could hear more crickets chirping in the summer than he did in the fall. Adam asked himself “What temperatures cause crickets to chirp the most?” He gathers 5 crickets and records the amount of chirps they make at different temperatures.
What is the independent and dependent variable?
IV: Temp
DV: number of chirps
400
IDENTIFY THE DEPENDENT VARIABLE: A zookeeper is researching the impact of different enrichment activities on the behavior of captive animals. Four groups of animals are given different activities: Group A has puzzle feeders, Group B has climbing structures, Group C has no enrichment, and Group D has sensory toys. Their behavior is observed and compared.
ANIMAL BEHAVIOR
400
IDENTIFY THE EXPERIMENTAL & CONTROL GROUPS: An engineer is investigating the effects of different materials on the flexibility of smartphone screens. They test four types of screens: Group A uses traditional glass screens, Group B uses flexible plastic screens, Group C uses ceramic screens, and Group D uses sapphire screens. The screens are subjected to bending tests, and the degree of flexibility is measured and compared.
EXPERIMENTAL: B, C, D
CONTROL: A
400
Make a claim about the data table.
four grams of fertilizer produced the most flowers on the plant
400
Make a claim about the data table.
Daylight hours are the longest in June.
Night hours are longest December and January
500
IDENTIFY THE IV & DV: Bug spray is sprayed on one arm and the other arm is not sprayed. The number of mosquito bites is counted after 2 hours.
IV: BUG SPRAY
DV: NUMBER OF BITES
500
IDENTIFY CONTROL GROUP: An ecologist wants to assess the impact of a new fishing regulation on marine biodiversity. One region enforces stricter fishing limits, while another region maintains the previous regulations. The diversity of fish species is measured and compared between the two areas.
REGION WITH THE PREVIOUS REGULATIONS
500
Make a claim about the graph.
O positive is the most common blood type
AB- is the rarest blood type.
The positive blood type is always the more common one.
500
IDENTIFY THE INDEPENDENT & DEPENDENT VARIABLES: A zookeeper is intrigued by the effects of different diets on the activity levels of tigers. She set up an experiment using three groups of tigers: Group A received a diet high in vegetables, Group B received a diet high in fruits, and Group C received a diet high in seeds. She recorded the amount of time the tigers spent playing in their enclosure.
IV: DIET
DV: TIME SPENT PLAYING