Designing Scientific Investigations — Unit test Answers

The main purpose of models is to gain a better understanding of the world.

Which statement best describes the variables in a controlled experiment?

Which action do researchers take to make advances in science?

Dani wants to measure the volume of a pebble. Which tool will give the most accurate measurement?

Which term best describes the important pieces of information that scientists gather and record during an experiment?

Which type of information is best represented by a chart?

Megan collected data about the trees in the park near her school. She determined that white oak, bur oak, ash, sycamore, and maple trees were the only trees that grew in the park. The pie chart below shows most of her data. Which label should Megan add to complete her chart?

Ali hypothesized that increasing fertilizer would increase plant growth. Four groups of thirty similar plants were given 0 to 15 ml of fertilizer, as shown in the graph. The change in plant height for each group over a two-week period was averaged and recorded.Plant GroupFertilizer Added (mL)Avg. Growth (cm)A04B56C108D153What is the best conclusion based on this data?

Which description indicates that a question is nonscientific?

A small amount of chemical splashes in Frank’s eye. What should Frank do immediately?

Sometimes new information results in minor changes to a theory. But sometimes new information results in a theory being discarded as incorrect. An example of an incorrect theory that was disproved by the discovery of new information is

A researcher is collecting qualitative data pertaining to social behaviors of deer at different times of the day. How will she most likely need to organize this data?

What is the primary purpose of writing a lab report?

What does the prefix pseudo mean in the word pseudoscience?

Which waste items should always be discarded in the hazardous waste container?