H Chemistry

During a Laboratory activity, a student combined two solutions. In the laboratory report, the student wrote “A yellow color appeared”. The statement represents the student’s recorded ____________.

• conclusion

• observation

• hypothesis

• theory

In the chemistry laboratory, chemicals that you are finished working with should be _________.

• poured into the sink

• returned to their original containers

• mixed together and dumped in a designated container

• disposed of as directed by your teacher

A scientist observes that the number of coyote sightings in suburban areas has increased over the last four years. In the process of forming a hypothesis as to why this number has increased, she would ____________.

• make a set of the controlled variable

• decide which variables can be controlled

• pose a tentative hypothesis explaining what was observed

• analyze data to explain what was observed

Which of these pieces of glassware should NEVER be heated with a bunsen burner?

• Beaker

• Graduated cylinder

• Flask

• Test tube

Which of the following is an example of applied research?

• Colliding nuclei to discover the smallest particle that makes up matter

• Using the results of DNA profiling as evidence in a court law

• Sending spacecraft to Mars to search for other life forms

• Testing chemicals to replace CFCs in air conditioners and refrigerators

Where is ozone located in the earth’s atmosphere?

• exosphere

• troposphere

• stratosphere

• mesosphere

Which branch of chemistry studies the components and composition of substances?

• analytical chemistry

• organic chemistry

• polymer chemistry

• theoretical chemistry

Which branch of chemistry studies chemical interactions?

• analytical chemistry

• organic chemistry

• polymer chemistry

• theoretical chemistry

Which branch of chemistry studies most carbon-containing chemicals?

• analytical chemistry

• organic chemistry

• polymer chemistry

• theoretical chemistry

Which branch of chemistry studies polymers and plastics?

• analytical chemistry

• organic chemistry

• polymer chemistry

• theoretical chemistry