Biology Lab Questions

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

When graphing your data, it is important to

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

Place the four phases of the scientific method in order.

When graphing your data, it is important that you

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

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

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.

There are two, two-sided dishes in the pillbug experiment. In one dish, you should have placed sand in both sides. In the other dish, you should have placed ______ in one side and ______ in the other.

In the pillbug experiment, your hypothesis

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

According to the results of the pillbug experiment,

In the pillbug experiment, if the pillbugs in the experimental chamber would have moved to the side of the chamber with sand instead of cornstarch, what would you have concluded?

Imagine that you wish to compare two different diets that will be fed to tadpoles raised in a lab. One diet is a meat-based fish food, and the other is the traditional diet of boiled lettuce. You want to see if the meat-based diet will be associated with an increase in the average weight of the tadpoles. In your experiment you keep all other factors, such as tadpole density per pan, temperature, pH, and the amount of food the same. The only difference between your control and experimental groups is the type of food the tadpoles receive. What is the independent variable for the tadpole diet experiment?

If you wanted to test whether or not a particular pain reliever was effective in the general population, you would need to design an experiment with an experimental group and a control group. What should be the only difference between these two groups?

In the pillbug experiment, it is important that measurements be taken twice: once at the beginning of the experiment, and once at the end of the experiment.

Imagine that you wish to compare two different diets that will be fed to tadpoles raised in a lab. One diet is a meat-based fish food, and the other is the traditional diet of boiled lettuce. You want to see if the meat-based diet will be associated with an increase in the average weight of the tadpoles. In your experiment you keep all other factors, such as tadpole density per pan, temperature, pH, and the amount of food the same. The only difference between your control and experimental groups is the type of food the tadpoles receive. Which is a good hypothesis for this tadpole experiment?

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

In the pillbug experiment, how many pillbugs did you need to use to get good information for the experiment?

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.

When determining the scope of an experiment, you need to consider (Select all that apply)

hypothesis

experiment

analysis

report

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.

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?

In the pillbug experiment, did your results support your hypothesis? Why or why not?

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

When measuring the volume of a liquid in a graduated cylinder, at which point should the measurement be taken?

On the Celsius scale, water freezes at 32 degrees.

Why is it important to use the tare function when weighing an object placed in a beaker?

The tare button is used to zero (i.e., reset) the scale.

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

A student was measuring the height of plants grown with different types of fertilizer or with plain water. He took his measurements using inches, then realized that he needed to use metric units, so he converted his measurements from inches to centimeters. What is the independent variable in this experiment?

When comparing the milligram, gram, microgram, and kilogram, the largest unit of weight is the kilogram.

Match each item with the correct base unit of the metric system used to measure the item. Meter Liter Temperature Gram

The Celsius scale is primarily used in climate studies and industry.

A student measured the weight of 10 male rats fed junk food compared to 10 male rats fed a healthy diet. The average weight of each group can be seen in the table below. What important variable did the student hold constant when she designed this experiment?

The metric scale of temperature is Fahrenheit.

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

The centigram is the smallest unit of weight.

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

The objective lenses are mounted to a rotating nosepiece.

To find the total magnification you must multiply the ocular lens magnification (10x) by the magnification of the objective lens. For example, if your objective lens is 10x and the ocular lens (eyepiece) is 10x, then your total magnification is 10 x 10= 100x.

A cover slide should be used to protect the objective lens from specimen on the slide and provides a level surface to make viewing easier.

The fine adjustment knob fine-tunes the focus of the specimen.

The objective lens 4x is scanning, 10x is low power, 40x is high power and 100x is oil immersion. The highest total magnification would be the oil immersion objective labeled 100x.

The objective lens magnifies the specimen. The mechanical stage moves the slide back and forth and right to left. The iris diaphragm controls the amount of light on the specimen. The course adjustment knob controls the stage movement up and down.

The ocular lens (eyepiece) magnifies the specimen 10 times.

What is the advantage of using a wet mount?

The course adjustment knob locates the specimen in the focus plane.

Adding the oil provides increased resolving power of the objective lens. Decreasing the light will make the image more difficult to view. The coarse focus should only be used with the lower magnification objective lens.

Obtain a clean slide and cover slip. Using a transfer pipette, obtain a drop of specimen and place onto the center of the slide. Carefully place the cover slip over the drop of specimen. Observe preparation under the 10X objective lens. Observe preparation under the 40X objective lens.

Pond water can contain many types of organisms. Which of the following are you most likely to find in a pond water sample? Please select all that apply.