Test
Unit 1 Practice Test
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Preguntas del test (31)
1A 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
- ANo control group was used
- BOnly one brand of vitamin was tested
- CThe sample size was not large enough
- DThe study lasted only one year
2In an experiment, the variable that is deliberately changed is the
- Acontrolled variable
- Bdependent variable
- Cindependent variable
- Dinferred variable
3Two 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 ________.
- AControlled variable
- BExperimental plot
- CReplicate plot
- DControl plot
- EDependent variable
4The best method for determining whether bean plants require sodium is to ________.
- Agrow bean plants with and without sodium
- Blook for sodium in leaf tissues using autoradiography
- Canalyze root content for sodium
- Dmeasure how fast radioactive sodium enters the plant
- Emeasure the amount of sodium in a few bean plants
5In experimental procedures, repetition of the procedures ___________.
- Ais necessary before concluding that a given set of results is correct
- Bis not necessary if the scientist obtains enough background information
- Cis too difficult for researchers doing fieldwork
- Dshould always be done by changing a variable
- Ewastes money that could be better spent doing new experiments
6Should an experiment test only one variable at a time? Why or why not?
- AAs long the experiment is repeated a sufficient number of times, it doesn't matter how many variables are used.
- BYes, an experiment should only test one variable at a time. This ensures that the experimental outcome is clearly due to one identifiable factor.
- CYes, and experiment should only test one variable at a time. That way, the experiment will only have to be performed once.
- DNo, it is not necessary to test only one variable per experiment, especially when time is of the essence.
7An 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
- Atime the student was squeezing the clothespin
- Bnumber of times the student was able to squeeze the clothes bin
- Cstrength of the student
- Dlength of the clothespin
8An 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
- Aincreasing the time
- Busing a plastic clothespin
- Cusing safety precautions
- Dsetting a specific type of exercise
9Which statement best describes a hypothesis?
- AA process of making careful observations
- BThe conclusion drawn from the results of an experiment is part of a hypothesis
- CA hypothesis serves as a basis for determining what data to collect when designing an experiment
- DThe data collected from an experiment written in the form of a hypothesis
10Label the X-axis.
- Adepth of water
11All of the following are characteristics of living things except the ability to
- Agrow and develop
- Breproduce asexually only
- Cmaintain a stable internal environment
- Dchange over time
12Which of the following is a fundamental unit of structure and function in living organisms?
- AOrganelle
- BOrganism
- CTissue
- DCell
13The ability to keep blood sugar levels within a fairly narrow range, despite the intake of meals high in carbohydrates, is an example of
- Ametabolism
- Basexual reproduction
- Can adaptation
- Dhomeostasis
14[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].
- AHomeostasis
- Bset point
- CFeedback Mechanisms
15A 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?
- AOwner gets up
- BThe bell
- CThe dog
- DDog rings the bells
16Complete the diagram below.
- ADilation of skin blood vessels & Sweat
- BBody temperature decreases
- CSet Point: 37.1*C
- DBody temperature increases
- EBlood vessels constrict & muscles shiver
- FNegative
17Find 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]- A40.8
- B38.5
- C23
- D44
18There 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.
- AQualitative
- BQuantitative
- CQuantitative
- DQualitative
19This is supported by a large body of evidence; explains how and why nature works.
- Ahypothesis
- Btheory
- Claw
20Describes how nature works through the use of mathematical equations. Does not focus on the how or the why.
- Ahypothesis
- Btheory
- Claw
21In a scientific experiment, the factors that stay the same through out the experiment are called...
- Aconstants
- Bcontrols
- Cvariables
22The dependent variable is the variable that is being measured in an experiment.
- AVerdadero
- BFalso
23In an experiment these are used to compare results to because we know they will not respond to the independent variable.
- Aconstants
- Bcontrols
- Cvariables
24You 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?
- Asoda
- Benergy drink
- Ccoffee
- Dlemonaid
25Which of the following it the correct order for increasing complexity?
- Acells--> tissues--> organs--> organ systems
- Btissues--> cells--> organ systems--> organs
- Corgans--> organ systems--> tissues--> cells
26The process of natural changes that take place during an organism's life is called ____.
- Aresponse
- Badaptation
- Cgrowth
- Ddevelopment
27Organisms 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].
- Aunicellular
- Bmulticellular
28[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.
- AAsexual
- Bsexual
- Cslower
29Which one of these is NOT one of the characteristics of living things?
- Aall living things drink water
- Ball living things are composed of one or more cells
- Call living things grow, develop, and have life spans
- Dall living things reproduce
30Living things require energy to survive. Which of the following is NOT an example of an organism requiring energy?
- Aheterotrophs consume food
- Borganisms contain DNA
- Cdecomposers break down dead material
- Dautotrophs use sunlight to produce their own food
31In order to maintain homeostasis, it is most important for an animal to be able to
- Achange it habitat
- Bhide from its predators
- Cincrease its prey population
- Drespond to its environment
Información
- Descripción
- 9th grade Biology Test sobre Unit 1 Practice Test, creado por Jessica Dewald el 05/07/2018.
- Autor
- Jessica Dewald
- Idioma
- English
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- 1.065
- Historial
- Creado el 5 jul 2018 · actualizado el 4 sep 2024
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