Midterm Bio 1

While a _______ accounts for a single observation, a ________ accounts for a group of observations.

hypothesis; theory

Which prefix added to the base unit means times 1000?

kilo

The base unit of fluid volume in the metric system is the

liter

In the metric system, the base unit of a liquid is the

liter.

The coarse adjustment knob on the microscope

locates the focus plane.

In the pillbug experiment, an important part of the experimental strategy was to

make observations at regular intervals.

In the metric system, the base unit of length is the

meter.

The base unit of measure for length in the metric system is the

meter.

In the length unit exercise, what tool did you use to measure the circles?

metric ruler

Place the steps of the scientific method in order.

observation, Pose questions, Clarify questions, Formulate Hypotheses, Experiment, Analyze data, Repeat Experiment, Form a conclusion

The arrows are pointing to the

ocular lenses.

According to the results of the pillbug experiment,

pillbugs tend to prefer cornstarch over sand.

When graphing your data, it is important that you

place the independent variable on the X-axis.

In the metric system, the ________ describes the relationship of each unit to the base unit.

prefix

In the weight exercise, the tare button was used to

reset the scale.

The mechanical stage lower knob causes the stage to move

right and left.

The objective lenses of the compound light microscope are attached to the

rotating nosepiece.

In the pillbug experiment, the substance used as the control was

sand

What instrument did you use to weigh objects in the metric system lab?

scale

In order to come to reliable conclusions about pillbug preferences, you needed to use the

scientific method

Before you begin a scientific experiment, you should (Select all that apply)

state a hypothesis. report on the results. decide on a strategy. record the data.

When converting between Fahrenheit and Celsius you should

subtract 32 and then divide by 1.8.

Which is closest in size to a human heart?

tennis ball

Please drag and drop each item to the correct location on the diagram.

top to bottom: Column of mercury; High pressure, no sound; Korotkoff sounds; Sound disappears; Stethoscope; Pressure cuff; Air valve

The liter is the metric base unit of measurement for

volume

In the pillbug experiment, your hypothesis

was related to the environment pillbugs prefer.

47.0 milligrams =

(4.7 centigrams= 0.00047 hectograms= 0.047 grams= 0.47 decigrams) All of the answer choices are correct.

Assume you drink 250mL of soda out of a 1 liter soda bottle. How many liters are left?

0.75 liters

What is the freezing point of water on the Celsius temperature scale?

0ºC

In the metric system, prefixes are used to assign values based on a factor of

10

How many centimeters are there in 1000 millimeters?

100

How many centimeters are there in a meter?

100

1,000,000 millimeters is equal to _____ meters.

1000

The temperature outside is 40 degrees Celsius. What is this in degrees Fahrenheit?

104 degrees Fahrenheit

Normal room temperature is 77 degrees Fahrenheit. What is the normal room temperature in Celsius?

25 degrees Celsius

What is the freezing point of water on the Fahrenheit temperature scale?

32ºF

How many chambers exist in a human heart?

4

A person weighs 120 lbs. What is this person's approximate weight in kilograms?

55 kg

How much of the blood is plasma?

55%

The thermometer on a sign indicates that it is 20 degrees Celsius. What is this in degrees Fahrenheit?

68 degrees Fahrenheit

What advantage does a graph have over a data table?

A graph readily reveals trends.

What makes a theory different from a hypothesis? Check all that apply.

A theory has a greater range of experimental support. A theory has stood the test of time. A theory can be a guess. A theory cannot be used to make predictions.

What is not a question that can be answered using the scientific method?

Are wood frog tadpoles cuter than bullfrog tadpoles?

In the metric system, the base unit of temperature is the

Celsius.

What are the four major tissue types that are found in animals?

Connective, muscular, epithelial, nervous

What four features are shared by all cells?

DNA, cytoplasm, cell membrane, ribosomes

All organisms have four-chambered hearts.

False

If the hypothesis in a scientific experiment is not supported, the experiment is considered a complete failure and must be repeated until a satisfactory outcome is reached.

False

Scientists are the only individuals who use the scientific method.

False

You do not need to pause to record your data as you perform your experiment. You can go back and estimate the values when the experiment is complete.

False

Place the four phases of the scientific method in order.

Hypothesis, Experiment, Analysis, Report

Which variable should be placed on the x axis?

Independent variable, which is also known as the controlled variable

Which are advantages of a closed circulatory system? Check all that apply

Oxygen is delivered directly to cells. Nutrients are delivered directly to cells. Wastes are removed directly from cells.

What is the advantage to separating the left and right sides of the heart?

Oxygenated and deoxygenated blood can be completely separated.

Some students consume large amounts of coffee and so-called energy drinks to help them stay alert when studying. You notice that many who engage in this practice seem to do poorly on exams. Suppose you want to investigate the relationship between caffeine consumption and exam performance. Which of the following statements would be an appropriate hypothesis?

Students who consume large amounts of caffeine while studying will have lower exam scores than those who consume less caffeine.

How is the metric system different than the standard United States system?

The metric system is based on units of 10.

A heart murmur is caused by incomplete closure of heart valves.

True

You should use the graph generated from your data to see if your hypothesis is supported.

True

What are the necessary components of a graph? Check all that apply.

X axis and Y axis, Labels with units of measure, Values on each axis, Data curve, Title, Statistical analysis

The arrow is pointing to the

arm.

The mechanical stage upper knob causes the stage to move

back and forth.

In the metric system, gram, meter, and liter are _____ units.

basic

In the weight exercise of the metric system lab, what object/materials did you practice weighing?

beaker and salt

Which outer structure explains the difference in shape between plant and animal cells?

cell wall

The __________ causes the stage to move upward or downward.

coarse adjustment knob

The arrow is directly pointing at the

coarse focus knob.

When utilizing the scientific method, there are two types of variables. They are

dependent and independent.

In the metric system exercise for length, you measured the _______________ of 3 circles.

diameter

Which of the following is NOT a commonly used unit of length in the metric system?

electrometer

After a period of time, most of the pillbugs appeared to spend most of their time on the side of the dish with sand, not cornstarch.

false

The fine adjustment knob on the microscope

fine-tunes the focus.

In the metric system, the base unit of weight is the

gram.