Lab Safety
Scientific Method
Measurements
Metric Conversions
Microscope
Lab Techniques & Graphs
100
You are heating a substance in a test tube. Always point the open end of the tube ______________ .
away from all people
100
You are designing an experiment to determine the preference of pill bugs for light or darkness. Identify two conditions that should be kept the same in all experimental setups.
temperature, humidity, species of pill bugs, type of container etc.
100
What is the approximate length of the earthworm shown in the diagram below?
90 mm
100
Convert 170 centimeter to meters.
1.7
100
To locate and observe a specimen on a slide with this microscope, a student should begin by using the _______________ adjustment and the ________-power objective.
coarse, low
100
A technique used to analyze pigments in leaves in shown in the diagram. This technique is known as ____________.
Chromatography
200
The diagram below shows a student heating some test tubes with chemicals in them during a laboratory activity.
Which lab safety procedures are being followed correctly?
The student is wearing safety goggles and the test tubes are open so that an explosion does not occur.
200
An experimental design included references from prior experiments, materials and equipment, and step-by-step procedures. What else should be included before the experiment can be started?
safety precautions to be used
200
What is the approximate length of the specimen in millimeters?
25 mm
200
Convert 93 kilograms to grams.
93,000 grams
200
While viewing a specimen under high power of a compound light microscope, a student noticed that the specimen was out of focus. Which part of the microscope should the student turn to obtain a clearer image under high power?
Fine adjustment
200
Which laboratory procedure is represented in the diagram below?
Adding stain to a slide without removing the coverslip.
300
The diagram below shows a student performing a laboratory activity.
What is one safety precaution that is being followed correctly?
The student is using a test tube holder to hold the heated test tube so he does not burn himself.
300
Daphnia are freshwater organisms sometimes referred to as "water fleas." You want to design an experiment that could be used to test the effects of temperature on the size of a daphnia population.
Identify the independent variable in the experiment.
Temperature
300
How much water should be removed from the graduated cylinder below to leave 5 mL of water in the cylinder? 
6 mL
300
A transparent metric ruler is placed on the stage of a microscope and observed under low power. The diameter of the field of vision was found to be 2.3 millimeters. How many micrometers is the diameter?
2,300 micrometers
300
The diagram below shows how a coverslip should be
lowered onto some single-celled organisms during the
preparation of a wet mount.
Why is this a preferred procedure?
The possibility of trapping air bubbles is reduced
300
Which piece of equipment would most likely be used to separate materials by density?
Centrifuge
400
True or False?
Chipped or cracked glassware is okay to use.
False
400
Some poinsettia plants have green leaves that turn red. A garden club decided to study the color change of poinsettia plants. Knowing that poinsettias change color during the short daylight periods of winter, they decided to investigate the effect of different daylight lengths on color change.
Identify the dependent variable in the experiment.
leaf color/whether or not color changes
400
The diagram below represents a portion of a triple-beam balance. What is the total mass?
545.2 grams
400
Which of the following measurements is greater?
0.5 L OR 400 mL
0.5 L
400
How should the student move the slide on the stage to center the single-celled organism in the field?
toward herself and to her left
400
Dr. Liz Hadly studied the ecology of Yellowstone National Park for 30 years, specifically the amphibians inhabiting the park for 20 of those years. Dr. Hadly studied 46 ponds in 1992-1993. Of these; 43 supported amphibians. From 2006-2008, only 38 of the original 46 ponds contained water. The graph below represents population data for four amphibian species collected by Dr. Hadly during 1992-1993 and 2006-2008.
Describe the trend in the amphibian populations over the course of the study. Support your answer with information from the graph.
Only the western toad population has remained the same. The populations of frogs and salamanders have decreased.
500
True or False?
All unauthorized experiments are prohibited.
True
500
An investigation was conducted using three groups of laboratory rats, X, Y, and Z, to determine
the relative effects of glucose and adrenaline on the rate of heartbeat. The experimental
conditions for each group of rats were kept the same except for the type of solution injected, as
shown in the data table. According to the data table, which group of rats functioned as the control?
Z
500
Base your answer to the following question on the diagram below, which represents a paramecium observed by a student using the low power objective (100×) of a compound light microscope.
What is the approximate length of the paramecium in micrometers?
700 micrometers
500
Zhang Li used a watering can to water the vegetables in her garden. The watering can holds 7.6 of water and she refilled it 4 times.
How many milliliters of water did Zhang Li use all together?
30,400 mL
500
A student determined that exactly 10 pollen grains could fit along the diameter of the field of view of a microscope. If each pollen grain has a diameter of 200 micrometers, what is the diameter in millimeters of this microscope's field of view?
2 mm
500
The greatest difference between the incidence of measles and the incidence of bacterial pneumonia occurred in which year?
1960