Name:
Living Environment
Date:
Ms. Iadanza
Lab Safety Do Now
1. Which statement describes two unsafe laboratory practices represented in the diagram?
1. The flame is too high and the test tube is unstoppered
2. The opening of the test tube is pointed toward the
student and the student is not wearing goggles.
3. The test tube is unstoppered and the student is not
wearing goggles.
4. The beaker has water in it and the flame is under the
tripod.
2. Which diagram illustrates the safest method of heating a solution in a test tube? (Note: The
student heating the tube is to the left of each diagram.)
1.
2.
3.
4.
Name:
Living Environment
Date:
Ms. Iadanza
Introduction to the Scientific Method Do Now #2
Base your answers to questions 1 through 6 on the information below and on your knowledge of
biology.
A chemical known as fertex affects external fertilization of sea urchin eggs. An
experiment was set up using three tanks to investigate the effect of fertex. Each
tank had a different concentration of fertex: 1%, 2%, and 3%. Ten sea urchin eggs
and 2 mL of sea urchin sperm were added to each of the three tanks. A fourth
tank was set up as a control.
1. Write a hypothesis for the experiment described above.
2. State one way the contents of the control tank would differ from the contents of the three
experimental tanks.
3. Identify two factors that must be kept the same in all four tanks.
Factor 1:
Factor 2:
4. State one way to improve the validity of the experimental results.
5. Identify the independent variable in the experiment.
6. State one example of the type of data (dependent variable) that should be collected during
the experiment.
Name:
Living Environment
Date:
Ms. Iadanza
Controlled Experiment Do Now #1
1. A new drug for the treatment of asthma is tested on 100 people. The people are
evenly divided into two groups. One group is given the drug, and the other group is given a
glucose pill (placebo). The group that is given the glucose pill serves as the
1. experimental group
2. limiting factor
3. control
4. indicator
Plants respond to their environment in many different ways. Design an experiment to test the
effects of temperature on plant growth.
In your answer, be sure to:
2. state one hypothesis the experiment would test
3. state how the control group would be treated differently from the experimental group
4. state two factors that must be kept the same in both the experimental and control
groups
Factor 1:
Factor 2:
5. identify the independent variable in the experiment
6. list one way to make this experiment more reliable
7. Which condition is necessary for an experiment to yield useful data?
1.
2.
3.
4.
Similar results should be obtained when the experiment is repeated
Only the expected results should be considered each time the experiment is performed.
The hypothesis must be correct.
The experimental period must be short.
8. Researchers performing an experiment should base their conclusions on
1.
2.
3.
4.
the hypothesis of the experiment
data from repeated trials of the experiment
a small sample size to ensure a reliable outcome of the experiment
results predicted before performing the experiment
Name:
Living Environment
Date:
Ms. Iadanza
Measurement Do Now
1. What is the volume of the liquid in the graduated cylinder shown
below?
1.
2.
3.
4.
23 mL
26 mL
27 mL
28 mL
2. The diagram below represents the measurement of a biological
specimen.
What is the approximate length of the specimen in
millimeters?
3. A student wanted to investigate the effect of light
on the rate of ripening of tomatoes. She set up four pots of
the same size with identical amounts of soil, water, and
type of tomato plants. Each plant was exposed to a
different intensity of light as shown in the table below.
To report the final results, which label would be most appropriate for the third column of the
data table?
1.
2.
3.
4.
Height of Tomato Plants (cm)
Average Ripening Time (days)
Average Weight of Tomatoes per Plant (grams)
Acidity of Tomatoes (pH)
4. A student collected data from an experiment on muscle fatigue. In order to interpret
these data, the student should
1. ignore the data because they do not support their hypothesis
2. recalculate the data so that the numbers are easier to work with
3. share the data with a student who has none
4. organize the data into a table or graph
Name:
Living Environment
Date:
Ms. Iadanza
Graphing Do Now
Directions: Using the directions included below to complete the graph and the related
questions.
A concentrated starch solution was placed in a thistle tube with a semi-permeable membrane
covering the wide opening. It was then placed in a beaker of water. The height of the solution in
the tube was measured every 5 minutes for 25 minutes. The setup and the data collected are
shown below.
Directions: Using the information in the data table, construct a line graph on the grid below,
following the directions below.
1. Mark an appropriate scale, without any breaks in the data, on each labeled axis.
2. Plot the data for height on the grid. Connect the points and
surround each point with a small circle.
3. The independent variable in this investigation is the
Name:
Living Environment
Date:
Ms. Iadanza
Scientific Method Review Do Now
Base your answer to questions on the information below and on your knowledge of biology.
Super-Size It?
The American Academy of Pediatrics has noted an increase in the population of children with
disorders that are usually associated with older adults, such as diabetes. Observers of American
culture point to the trend to “super-size” food servings as a possible cause. Larger servings might
encourage children of today to eat more fats and sugars than children ate a generation ago. In an
attempt to determine if there is a relationship between diet and the development of diabetes in
children, a study was done which surveyed a group of children regarding their eating habits and
whether or not they were diabetic. When the survey results were collected, the data were used to
organize the children into two groups based on their responses, and then the data were
analyzed.
Discuss this investigation. In your answer, be sure to:
1 state the hypothesis being tested in this investigation
2 identify one survey response that was most likely used for organizing the children into two
groups
3 state what survey results would support the hypothesis stated above