Intro to Chem Quiz

The Dependent Variable must be...

• Changed by the experimenter

• Quantifiable

• Qualitative

• Kept the same for each trial in the experiment

How did Antoine Lavoisier Transform Chemistry?

What is a hypothesis?

• The Results of an Experiment

• The data point that is collected throughout the experiment

• An Educated guess about the result of an experiment

• The Question you ask to start an experiment

Recall the Mythbusters experiment around Running or Walking in rain. Jamie and Adam identify that there are many variables they must keep the same through each test. For example the Rate of Rainfall, The Overalls worn, the Wind, The speed at which they walked or ran. What do we call the group of variables that must stay the same in an experiment?

• Constant Variables

• Dependent Variables

• The X and Y Variables

• Independent Variables

Recall the Experiment John Conducted on baking bread. What was the independent variable of his experiment?

• The mass of the bread

• The variable rate of sugar added to the recipe

• The age of the yeast

• The humidity of the room the bread rose in.

When tracking your data you should*

• Aimlessly write down your data without any organization

• Ignore your data, observation is more important

• Track your data through the use of Tables, Graphs, photographs and any other visual aid.

Susie wants to know how different colors of light effect the growth of plants. She believes that plants can survive the best in white light. She buys 5 ferns of the same species, which are all approximately the same age and height. She places one in White Light, one in Blue Light, one in Green Light, one in red light, and one in the closet. All of the ferns are planted in Miracle-grow and given 20 mL of water once a day for 2 weeks. After the two weeks, Susie observes the plants and measurements.                                                        

   What is the Independent Variable, dependent variable, and what is her hypothesis?

Why is Collaboration and communication so important to scientific thinking?

What is the last step of scientific method?

• hypothesis

• observe

• communicate

• question

A series of steps used by scientists to solve a problem or answer a question. 

• scientific method
• recipe
• data collection
• metric system