14329049
Descripción
Test por Jessica Dewald, actualizado hace 3 meses
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Creado por Jessica Dewald
hace más de 6 años
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Pregunta 1
Pregunta
A company that manufactures a popular multivitamin wanted to determine whether their multivitamin had any side effects. For the initial study, the company chose 2000 individuals to take their multivitamin tablets per day for one year. Scientists from the company surveyed the participants to determine whether they had experienced any side effects. The greatest problem with this procedure is that
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No control group was used
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Only one brand of vitamin was tested
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The sample size was not large enough
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The study lasted only one year
Pregunta 2
Pregunta
In an experiment, the variable that is deliberately changed is the
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controlled variable
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dependent variable
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independent variable
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inferred variable
Pregunta 3
Pregunta
Two garden plots were planted with corn. The soil was similar in each, and equal amounts of water were applied to each plot. One plot was fertilized, and the other was not. The experimenters measured the yield of bushels of corn from each plot. The plot that did not receive the fertilizer was the ________.
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Controlled variable
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Experimental plot
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Replicate plot
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Control plot
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Dependent variable
Pregunta 4
Pregunta
The best method for determining whether bean plants require sodium is to ________.
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grow bean plants with and without sodium
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look for sodium in leaf tissues using autoradiography
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analyze root content for sodium
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measure how fast radioactive sodium enters the plant
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measure the amount of sodium in a few bean plants
Pregunta 5
Pregunta
In experimental procedures, repetition of the procedures ___________.
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is necessary before concluding that a given set of results is correct
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is not necessary if the scientist obtains enough background information
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is too difficult for researchers doing fieldwork
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should always be done by changing a variable
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wastes money that could be better spent doing new experiments
Pregunta 6
Pregunta
Should an experiment test only one variable at a time? Why or why not?
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As long the experiment is repeated a sufficient number of times, it doesn't matter how many variables are used.
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Yes, an experiment should only test one variable at a time. This ensures that the experimental outcome is clearly due to one identifiable factor.
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Yes, and experiment should only test one variable at a time. That way, the experiment will only have to be performed once.
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No, it is not necessary to test only one variable per experiment, especially when time is of the essence.
Pregunta 7
Pregunta
An experiment was designed to test whether students could squeeze a clothespin more times in one minute after resting or after exercise. The dependent variable for this experiment is
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time the student was squeezing the clothespin
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number of times the student was able to squeeze the clothes bin
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strength of the student
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length of the clothespin
Pregunta 8
Pregunta
An experiment was designed to test whether students could squeeze a clothespin more times in one minute after resting or after exercise. The experimental result can be made more valid by
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increasing the time
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using a plastic clothespin
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using safety precautions
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setting a specific type of exercise
Pregunta 9
Pregunta
Which statement best describes a hypothesis?
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A process of making careful observations
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The conclusion drawn from the results of an experiment is part of a hypothesis
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A hypothesis serves as a basis for determining what data to collect when designing an experiment
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The data collected from an experiment written in the form of a hypothesis
Pregunta 10
Respuesta
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depth of water
Pregunta 11
Pregunta
All of the following are characteristics of living things except the ability to
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grow and develop
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reproduce asexually only
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maintain a stable internal environment
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change over time
Pregunta 12
Pregunta
Which of the following is a fundamental unit of structure and function in living organisms?
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Organelle
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Organism
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Tissue
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Cell
Pregunta 13
Pregunta
The ability to keep blood sugar levels within a fairly narrow range, despite the intake of meals high in carbohydrates, is an example of
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metabolism
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asexual reproduction
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an adaptation
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homeostasis
Pregunta 14
Pregunta
[blank_start]Homeostasis[blank_end] is the process of maintaining a stable internal environment. [blank_start]Feedback Mechanisms[blank_end] are used to regulate our internal environment around a [blank_start]set point[blank_end].
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Homeostasis
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set point
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Feedback Mechanisms
Pregunta 15
Pregunta
A dog rings a set of bells hanging on the door handle. The dog's owner gets up to let them outside. What is the Stimulus in this situation?
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Owner gets up
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The bell
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The dog
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Dog rings the bells
Pregunta 16
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Dilation of skin blood vessels & Sweat
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Body temperature decreases
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Set Point: 37.1*C
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Body temperature increases
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Blood vessels constrict & muscles shiver
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Negative
Pregunta 17
Pregunta
Find the mean, median, mode, and range for the following set of data:
33, 23, 44, 23, 67, 55
Mean: [blank_start]40.8[blank_end]
Median: [blank_start]38.5[blank_end]
Mode: [blank_start]23[blank_end]
Range: [blank_start]44[blank_end]
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40.8
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38.5
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23
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44
Pregunta 18
Pregunta
There are two types of data that can be collected when conducting an exerpiment. [blank_start]Qualitative[blank_end] which are obervations made using your senses and [blank_start]Quantitative[blank_end] in which instruments are used to collect numerical data.
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Qualitative
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Quantitative
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Quantitative
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Qualitative
Pregunta 19
Pregunta
This is supported by a large body of evidence; explains how and why nature works.
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hypothesis
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theory
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law
Pregunta 20
Pregunta
Describes how nature works through the use of mathematical equations. Does not focus on the how or the why.
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hypothesis
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theory
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law
Pregunta 21
Pregunta
In a scientific experiment, the factors that stay the same through out the experiment are called...
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constants
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controls
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variables
Pregunta 22
Pregunta
The dependent variable is the variable that is being measured in an experiment.
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- True
- False
Pregunta 23
Pregunta
In an experiment these are used to compare results to because we know they will not respond to the independent variable.
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constants
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controls
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variables
Pregunta 24
Pregunta
You know caffiene can have an impact on a person's heart rate. If you were to conduct an experiment to determine the effect caffiene has on a person's heart rate which item below would you use as your control?
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soda
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energy drink
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coffee
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lemonaid
Pregunta 25
Pregunta
Which of the following it the correct order for increasing complexity?
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cells--> tissues--> organs--> organ systems
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tissues--> cells--> organ systems--> organs
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organs--> organ systems--> tissues--> cells
Pregunta 26
Pregunta
The process of natural changes that take place during an organism's life is called ____.
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response
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adaptation
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growth
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development
Pregunta 27
Pregunta
Organisms that consist of one cell are said to be [blank_start]unicellular[blank_end], while organisms composed of many cells are said to be [blank_start]multicellular[blank_end].
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unicellular
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multicellular
Pregunta 28
Pregunta
[blank_start]Asexual[blank_end] reproduction consists one parent cell, while [blank_start]sexual[blank_end] reproduction requires two parent cells. Sexual reproduction happens at a [blank_start]slower[blank_end] rate than asexual reproduction.
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Asexual
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sexual
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slower
Pregunta 29
Pregunta
Which one of these is NOT one of the characteristics of living things?
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all living things drink water
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all living things are composed of one or more cells
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all living things grow, develop, and have life spans
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all living things reproduce
Pregunta 30
Pregunta
Living things require energy to survive. Which of the following is NOT an example of an organism requiring energy?
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heterotrophs consume food
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organisms contain DNA
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decomposers break down dead material
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autotrophs use sunlight to produce their own food
Pregunta 31
Pregunta
In order to maintain homeostasis, it is most important for an animal to be able to
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change it habitat
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hide from its predators
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increase its prey population
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respond to its environment
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