Exam Review, #Educreator12

   Ms. Pryor’s class grew a bean plant in class and recorded its height over 14 days.  The graph below shows the results Ms. Pryor's class collected.

 

What was the dependent variable for this investigation?

 

 

• The length of time     

•   The number of days

• The amount of sunlight

•   The height of the bean plant

  Jonathan performed an experiment to demonstrate the effects of temperature on plant growth. He grew the plants using three different temperatures. Jonathan repeated the experiment five times. What was the purpose of Jonathan repeating the experiment?

•       To ensure the data was more reliable.

•   To determine which type of plant grows the best.

•   To see if other friends would get the same results.

•    To prove to the teacher that his results were correct.

Experiment 1

Students planted thirty tomato seeds.  Ten were planted in soil with an acidic pH.  Ten were planted in soil with a neutral pH.  Ten were planted in soil with a basic pH.  Students observed the height and appearance of the plants over three weeks.

Experiment 2

Students in Ms. Watts’ class performed the same experiment and they compared data with the students in Mr. Goff’s class.

Which statement best compares Experiment 1 and Experiment 2?

• Experiments 1 and 2 represent scientific repetition.

•     Experiments 1 and 2 represent scientific replication.

•       Experiment 1 represents scientific repetition.  Experiment 2 represents scientific replication.

•     Experiment 1 represents scientific replication.  Experiment 2 represents scientific repetition.

  Jana works in the field studying gorillas' behaviors. Ali works in a laboratory conducting experiments on the effects of missing chromosomes in gorillas. How does their work differ?

• Ali's work can be supported by data.      

•   Ali's work does not involve observation.       

• Jana's work is not scientifically valid.

•   Jana's work does not involve controlled variables.

A biologist is investigating how changes in average temperature of the environment might affect butterfly metamorphosis. Which of the following methods of investigation are best suited for this research?

 

• controlled experiments         

• systematic observations                    

•       

  models and casual observations        

• random sampling of populations

    

A farmer wants to increase the rate at which he can grow corn.

Which of the following is NOT an independent (test) variable the farmer could investigate?

 

• the brand of corn seed

•   the size of the corn seed

•   the time it takes the corn to grow 1 meter

•   the number of corn seeds in the package

.   Jim loves tomatoes. He believes that fertilizer will make tomato plants grow faster, so he treated one tomato plant with fertilizer and the other tomato plant did not receive fertilizer. They both received the same amounts of water & sunlight. What is the experimental control?

 

• Height of the Plant

• Plant Receiving Fertilizer

• Plant Not Receiving Fertilizer

• Amount of Water and Sunlight

.   A biologist thinks she has discovered a new species of plant, what is the best evidence to support her thinking?

 

• She compares plant traits to others in a fictional book she read.

• The scientist measured one plant and had a gut feeling she was correct

• The scientist observed a plant that looked differently and decided it must be a different plant.

• She takes measurements of the plant and compares them to other measurements in her science journal.

. Virologists are concerned about the impact contagious viruses have on humans.  Which of the following is NOT an example of empirical evidence a virologist would use to explain their concerns?

•   Virologists have observed that viral mutations have increased.

• Virologists testify to Congress to enact laws to slow virus transmission.

• Virologists have measured a decrease in the transmission rate of the virus.

• Virologists have measured an increase in the concentration of viral particles.

The theory of evolution has changed over time.  Initially Lamarck believed that organisms developed traits in response to a changed environment to improve their chances for survival.  Later Darwin proposed that organisms that already possessed traits suitable to a changed environment were more likely to survive and reproduce.

Which of the following does NOT explain why the theory of evolution has changed?

•   Lamarck’s theory was discarded when new scientific information became available.

•   Darwin collected empirical evidence to support those organisms with favorable traits survived and reproduced

• Other scientists such as Peter and Rosemary Grant have collected additional empirical evidence that supports Darwin’s findings

• The theory of evolution became a scientific law after much debate and confirmation in the scientific community.