Controlled Experiments
Humans and Hominids
Brains
Data Analysis
Geologic Time
100
Dr. Grey discovers a new drug that she hypothesizes will increase fat storage in rabbits. She designs an experiment to test her hypothesis. Dr. Grey separates twelve rabbits into two equal groups and measures their body fat individually. She gives one group of rabbits the drug but does not give the drug to the other group. She keeps everything else about the rabbits' living environment the same, including the amount of water and food provided. After a month, she measures the body fat of the rabbits in both groups. What is the control group in Dr. Grey's experiment? A. the group of rabbits that are not given the drug B. the body fat of the rabbits C. the group of rabbits that are given the drug D. the quantity of experimental drug used
A. the group of rabbits that are not given the drug
100
Humans are capable of moving from place to place in a way that is unique compared to other primates. What is this type of movement called? What does it look like?
Bipedalism, or being bipedal. It involves walking on two feet.
100
What part of the brain is associated with language, complex reasoning, voluntary movement, etc.?
The cerebrum
100
Which of the following conclusions can be drawn from the graph? A. The human population has experienced the most growth during the modern age. B. The human population was completely eradicated by the plague. C. The human population is not controlled by a carrying capacity. D. The human population has not suffered from disease in the past 500 years.
A. The human population has experienced the most growth during the modern age.
100
Define what geological and biological events are.
Geological events- events involving the changing Earth. Biological- events involving life on Earth
200
Sean wants to know whether monarch butterflies prefer to feed from flowers of a certain color. Sean placed different colored lantana flower plants in separate 1-L terra cotta flower pots. He has a white lantana, purple lantana, orange lantana, yellow lantana, and red lantana. Sean set the pots on his back porch. He then observed the pots for four days and recorded how many visits each of the flower plants received from a monarch butterfly. What is the independent variable in Sean's experiment? Different colored lantana plants.
Different colored lantana plants
200
What feature of the human hand makes it especially unique?
An opposable thumb to allow for more precise and stronger grip.
200
What makes the human brain especially unique (compared to many other animals)?
It has a larger cerebrum with more complex "folds."
200
A dentist hypothesizes that patients that floss their teeth every day will have fewer cavities than those that don't. He questioned several of his patients regarding their flossing habits and then compiled the table found below. Patient Name Flosses daily? Number of cavities Jamal Y 2 Kendra N 4 Stephanie N 1 Brandy Y 3 Travis Y 1 Does the dentist's data support his hypothesis? A. Further research is needed. B. Yes; flossing daily prohibits the formation of cavities. C. No; flossing daily actually increases the number of cavities. D. Yes; flossing daily definitely reduces the number of cavities.
A. Further research is needed.
200
What percent of Earth's history was ruled by single-celled organisms, or bacteria?
90%
300
Nicole has planted a vegetable garden in her back yard. She is experiencing several problems with the garden. Which of the following of Nicole's problems could be solved through a scientific investigation? A. Which vegetable plants will look most attractive growing in the garden? B. Why doesn't Nicole's dog chase away the rabbits that infest the garden? C. How can Nicole improve the garden soil's fertility? D. How can Nicole get her family to eat more fresh vegetables?
C. How can Nicole improve the garden soil's fertility?
300
What is a hominid? a. Human/monkey hybrid b. All ancient humans. c. Any primate which can walk bipedally, including modern humans and primate ancestors to humans. d. Lucy's family
c. Any primate which can walk bipedally, including modern humans and primate ancestors to humans.
300
What part of the brain is associated with balance and movement?
The cerebellum.
300
A student hypothesizes that placing blood cells in high concentrations of salt water will cause them to grow and eventually lyse, or burst. He performed an experiment in which he submerged blood cells in various concentrations of salt water and recorded his results in the table below. All conditions were kept the same except for the salinity of the water. Salinity Cell Diameter Lysis? 0.0% N/A Y 0.3% 8.0 μm N 0.6% 7.4 μm N 0.9% 6.6 μm N 1.2% 6.0 μm N Does the student's data support his hypothesis?
No; the cells shrink with increasing salinity.
300
Describe the patterns seen in the order of geological and biological events, as well as in plant and animal events.
Geological precedes biological events. Biological events depended on geological events to occur. Plant precedes animal events. Animal events depended on plant events to occur.
400
Define dependent variable.
The variable that is measured as a result of changes to the independent variable.
400
What evidence in the Lucy find indicated that being bipedal evolved before big brains?
Lucy had the knee and pelvis of a bipedal animal but a skull no larger than a chimps, indicated she might have had a small brain.
400
What happened to Phineas Gage and how did it change him?
A pipe went through the front of his cerebrum (frontal lobes), and changed his personality for the worse.
400
The average distance that separates two bonded atoms is their bond length. The energy that is released as a bond is formed is known as their bond energy. Examine the following chart which shows the bond length and energy of some common compounds: Bond Length (pm) Energy (kJ/mol) H-H 75 436 H-C 109 418 C-O 143 341 C-Cl 177 326 I-I 266 151 What can be inferred from the information in the chart? A. Nuclear fusion releases more energy than nuclear fission. B. Carbon is not able to bond with itself. C. Bond length and energy are inversely related. D. Larger atoms form stronger bonds than smaller atoms.
C. Bond length and energy are inversely related.
400
Describe the progress of plant evolution according to the timeline (aka- how do the plants change over time)?
Water plants--> Land Plants--> Seed Producing Plants
500
In an experiment designed to measure the effect of music on brain-waves, 6 subjects listen to classical music, while another 6 subjects do not. Brainwaves of both groups are then measured. What is the dependent variable?
Measurement of brainwaves.
500
In what ways is an inference different than just a random guess?
Inference relies upon making logical conclusions from available evidence.
500
Order these brains from least to most complex. What features about these brains allow you to order them in this way? Sheep Brain, Amphibian brain, Human Brain, Chimp Brain
Amphibian brain-> Sheep Brain-> Chimp Brain -> Human Brain - By size and complexity (folds) of the cerebrum. By size of the brain itself.
500
Helen recorded the following data about the half-life of a radioisotope. Radioactive Decay of Radioisotope A Grams of Radioactive Material Remaining Time (in billions of years) 200 0 100 1 50 2 25 3 12.5 4 6.25 5 Which of the following types of graphs could Helen use to best organize her data? A. line graph B. bar graph C. histogram D. circle graph
A. line graph
500
What might be the explanation for the second Oxygen event on the timeline in which oxygen levels reached present day amounts?
The evolution of plants (specifically land plants)
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