Unit 1 Test Review

All of the following pieces of equipment EXCEPT for _____________ could be useful for transferring a liquid from one container to another.

• beaker

• funnel

• petri dish

• graduated cylinder

Joe needs 25mL of motor oil to test his combustion engine. Which tool would give him the most precise measurement?

• Beaker

• Flask

• Test tube

• Graduated cylinder

Which of the measurements below is the most accurate?

• Graduated cylinder - 80.6 mL

• Erlenmeyer flask – 325 mL

• Beaker - 48 mL

• Beaker - 400 mL

Which of the measurements below is the most precise?

• Graduated cylinder - 80.6 mL

• Erlenmeyer flask – 325 mL

• Beaker - 48 mL

• Beaker - 400 mL

Which piece of glassware is never used for making measurements?

• Graduated cylinder

• Beaker

• Test tube

• Erlenmeyer flask

When leaving a movie theater, a person notices that the sidewalk is now wet. If the person assumes it rained during the movie, the person is making

• a hypothesis.

• an inference.   

• an observation.

• a prediction.

In performing any laboratory experiment, what is the first step performed out of the following choices?

• Collect data from the experiment

• Analyze data

• Publish results

• Form hypothesis

Alexander was studying the effect of playing rock music on plant growth. One of the plants was exposed to rock music for 24 hours a day for a period of 6 weeks. Data on the growth of the plant was collected at the end of each week and plotted in a graph. Based on the data, which would be the MOST reasonable measurement at the end of an 8 week period?

• 2 decimeters

• 5 decimeters

• 8 decimeters

• 16 decimeters

When designing an experiment, scientists will test a relationship between a “cause” and an “effect.” The “effect,” also represented by what the scientist measures and records, is known as the

• dependent variable.

• constant.         

• independent variable.

• control group.

Leah, LaRenda, and Gabi decide to test what factors influence water absorption by an egg. They remove the shell from 3 eggs by dissolving them in vinegar. They create three different water solutions. One is pure, 100% distilled water, a second is 50% water/50% corn syrup, and the third is 100% corn syrup. The mass of each egg is measured before they are put into a single solution for 24 hours. The mass of the eggs is then measured, and the data recorded:

In this experiment, the independent variable they are testing is

• change in the mass of the eggs.

• the ending mass of the eggs

• the amount of time they were in the solution

• the type of solution the egg is placed in