Biology (2) and Integrated Physics and Chemistry (2) Scientific Processes. The student uses scientific methods during field and laboratory investigations. The student is expected to
(A) plan and implement investigative procedures including asking questions, formulating testable hypotheses, and selecting equipment and technology ;
Here’s what you have to do if you want to pass this part of the TAKS:
Know the names and use of standard lab equipment.
Know how to pick out and use the steps of the scientific method.
Pick out the following from a description of an experiment: hypothesis, independent variables, dependent variable, control, data, and conclusion .
Laboratory Equipment “ The use of the tools, equipment, and materials included in the middle and high school science TEKS is part of this objective. Students will be required to recognize these tools and know how to properly use them. - Grade 11 TAKS Science Information Booklet. p 16.
Two science students discovered that the mass of a sample of acetone in an open beaker decreased within a few minutes. One students hypothesized that the acetone reacted with oxygen to form a gaseous compound that escaped. The other student believed that the acetone evaporated into the air. What should the students do to test these hypotheses?
F Combine the hypotheses so they give valid predictions of the acetone’s behavior
G Conduct a study of original papers describing the experiments leading to acetone’s discovery
H Perform an experiment that attempts to identify the gas above the open beaker
J Ask a classmate’s opinion about the chemical and physical properties of acetone
What data did the researchers have to collect during the experiment?
In this experiment what should be placed in the control container? A water, and 1% hormone. B seeds and water C seeds only D 1% hormone only Control Experimental groups soil soil seeds Water and 5% hormone Water and 10 % hormone Sample Question