Scientific Method Final Review

Scientific Method Final Review

Review for Summative!

Scientific Method

A general guideline for steps to answer questions about the world!

Poll

Have you been keeping track of notes in a written notebook?

• Yes

• Only sometimes

• No

Agenda for Today

• Review all relevant notes slides for quiz

• Take notes during slides (formative note check due tomorrow!)

• Quizizz game to prepare for Quiz

• Asynch - take quiz

Multiple Choice

Controlled variables...?

• Are affected by the ind. variable

• Are affected by the dep. variable

• Are kept constant throughout the experiment

• Are not including in an experiment.

Multiple Choice

A scientist is testing whether different colored lights will impact the growth of plants. She grows plants under white, green, red, and blue lights and measures how tall the plants grow. The soil, species, water level, and amount of light are consistent for all plants.

What is the independent variable?

• Amount of light

• Color of light

• Amount of soil

• How tall the plant is

Multiple Choice

A scientist is testing whether different colored lights will impact the growth of plants. She grows plants under white, green, red, and blue lights and measures how tall the plants grow. The soil, species, water level, and amount of light are consistent for all plants.

What is the dependent variable?

• Amount of light

• Color of light

• Amount of soil

• How tall the plant grows

Multiple Choice

True or false - the Independent variables causes a change in the dependent variable?

• True

• False

Multiple Choice

True or False - the experimenter directly causes the dependent variable to change?

• True

• False

Open Ended

In 1928, Sir Alexander Fleming was studying Staphylococcus bacteria growing in culture dishes. He noticed that a mold called Penicillium was also growing in some of the dishes. A clear area existed around the mold because all the bacteria that had grown in this area had died. In the culture dishes without the mold, no clear areas were present.

What is a hypothesis we could make from this scenario?

Fill in the Blank

Fleming hypothesized that the mold must be producing a chemical that killed the bacteria. He decided to isolate this substance and test it to see if it would kill bacteria. Fleming transferred the mold to a nutrient broth solution. This solution contained all the materials the mold needed to grow. After the mold grew, he removed it from the nutruient broth. Fleming then added the nutrient broth in which the mold had grown to a culture of bacteria. He observed that the bacteria died.

The indepedent variable in this scenario was...?

Multiple Choice

Fleming hypothesized that the mold must be producing a chemical that killed the bacteria. He decided to isolate this substance and test it to see if it would kill bacteria. Fleming transferred the mold to a nutrient broth solution. This solution contained all the materials the mold needed to grow. After the mold grew, he removed it from the nutruient broth. Fleming then added the nutrient broth in which the mold had grown to a culture of bacteria. He observed that the bacteria died.

Based on the results of this experiment - should he accept or reject his hypothesis?

• Accept

• Reject

Multiple Choice

Fleming repeated the experiment 10 times. In each experiment he noted how long it took for the bacteria to die. He noted that the longer the mold was kept in the nutrient solution, the shorter it took for the bacteria to die.

This could best be described as what portion of the scientific method?

• Analysis

• Conclusion

• Hypothesis

Multiple Select

In the infamous Milgram experiment - participants were tricked into thinking that they were actually harming another person - causing high levels of stress and guilt.

Which guideline of ethical research did this experiment violate?

• Informed Consent

• Do not harm participants

• Fairness in selecting participants

Multiple Select

In the infamous Tuskegee Syphillus experiment, the students at Tuskegee University (a historical black college) were selected for without their knowledge.

This violates what ethical guidelines?

• Informed consent

• Do No harm

• Fairness in selection