Biology SOL Review I

1. Put the steps of the Scientific Method in order from 1 to 6. Step 1 Observation Step 2 Question Step 3 Hypothesis Step 4 Experiment Step 5 Collect Data Step 6 Conclusion 2. Complete the statements dealing with the observation, hypothesis or inferences. a. A hypothesis becomes a theory only when it is supported by consistent data from many experiments. b. An observation is information that can be collected using the senses.c. An inference is a connection based on an observation.d. A qualitative observation (data) is based on descriptions.e. A quantitative observation (data) is based on numbers. 3. There are 5 important parts to a controlled experiment. a. Group in an experiment that does not receive the independent variable. It is a standard for comparison.Controlb. Group in an experiment that receives the independent variable. Experimentalc. Conditions of an experiment that are applied to all groups. Constantd. The variable that is being tested. There should only be one in a controlled experiment. Independente. The variable that is measured in the experiment. This variable is the source of the data.Dependent 4. On a graph, the independent variable is always on the _axis; the dependent variable is always on the _ axis X, Y Y, X 5. The following images were taken using an electron microscope. Place the following statements under the categories of Qualitative Observation, Quantitative Observation or Inference. Musca domestica (housefly) Qualitative Observation Has Wings Has Eyes Has Legs Quantitative Observation Has Two Wings Has Six Legs Has Two Eyes Inference It can Walk It can See It can Fly 6. Put the following steps of the scientific method in order from 1 to 4. a. 3 Perform a controlled experiment.b. 4 Analyze results and draw conclusions.c. 1 Identify a question or problem.d. 2 Form a hypothesis. 7. Analyze the following experiment.A student designed an experiment to see if plants grow better when watered with a sugar solution. He divided the plants into three groups. Once a week for two months, he watered the plants in each group using a different sugar solution for each plant group. Group A got watered with water only, Group B got watered with a 25% sugar solution, and Group C got watered with a 50% sugar solution. At the end of two months, he measured the final height of each plant. a. What is the Independent Variable? sugar water solutionb. What is the dependent variable? growth of plantsc. What is(are) the experimental group(s)? groups B and Cd. Why? they received the independent variablee. What is the control group? group Af. Why? did not receive the independent variableg. What is one constant in the experiment? how often watered 8. A group of students wanted to know the effect of caffeine on the heart rate of worms. They put 15 worms in a dish, add caffeine, and measure their heart rate. Which of the following is the greatest error in the students’ experimental design? They have no control group They have too many uncontrolled variables 9. A group of students wanted to know the effect of brushing your teeth on the development of cavities. They had 15 people brush their teeth once a day with Crest toothpaste; another 15 people brushed their teeth two times a day with Colgate toothpaste; and another 15 people did not brush their teeth at all. Which of the following is the greatest error in the students’ experimental design? They have no control group They have too many uncontrolled variables 10. A scientist is studying the effect of probiotics on life expectancy. They divide 40 mice into 4 groups with 10 mice in each group. Group A receives no probiotics in their food; Group B receives 20mg of probiotics in their food; Group C receives 40mg of probiotics in their food; and Group D receives 80mg of probiotics in their food. They record how long the mice in each group live. a. What is the independent variable? probioticsb. What is the dependent variable? life expectancyc. What is(are) the experimental group(s)? groups B-Dd. Why? received the independent variablee. What is the control group? group Af. Why? did not receive the independent variableg. What is one constant in the experiment? how they received the probioticsh. Why? included all groups 11. Label the parts of the microscope. Word Bank: coarse adjustment knob, eyepiece, fine adjustment knob, lamp, objectives, stage eyepiece stage lamp fine adjustment knob coarse adjustment knob objectives 12. Answer the following questions dealing with the parts and magnification of a microscope. a. On a microscope, the eyepiece has a magnification of 10X, and the objective lens has amagnification of 10X. What is the total magnification of the microscope? 100Xb. If my eyepiece has a magnification of 10X, and I want to view an object at a total magnification of400X, what power objective lens should I use? 40 Xc. First to look at cells under a microscope? Robert Hooked. First to look at living cells under a microscope? Anton van Leeuwenhoeke. Gave cells their name? Robert Hookef. “Father of Microbiology”? Anton van Leeuwenhoek Hypothesis vs Theory