GACE Science Practice Test Exam 90 Correct Questions and
Answers.
A researcher is studying the response of bacteria to a certain chemical. In 3 experiments,
the bacteria swim towards the chemical, and in one experiment the bacteria swims away
from it. What would be the most appropriate next step for the researcher.
a. Report only the 1st three experiments.
b. Report all the experiments but refrain from making any conclusions.
c. Repeat the experiment several more times and apply a statistical analysis to the data.
d. Repeat the experiment, adding a new chemical to determine its effect on the bacteria. -
Correct Answer C
In a study investigating the cause of stomach ulcers, researchers observed that coffee
drinkers had a higher incidence of stomach ulcers than those who didn't drink coffee. This
is an example of:
a. a controlled experiment
b. a cause and effect relationship
c. correlation between two variables
d. systematic error in sampling - Correct Answer C
In terms of mass, which of the following represent the greatest amount of sucrose (Molar
mass=342 grams)?
a. 1 mole
b. 100 grams
c. 1L of a 0.1M solution
c. 100mL of a 1M solution - Correct Answer A
In an experiment on respiration, carbon dioxide production is measured over time.
Placing the data in a chart is
a. A visual representation of the data
b. a conclusion based on the data
c. the raw data
,d. a comparative analysis of the data - Correct Answer A
In order to be included in the formation of a scientific conclusion, evidence must be
a. quantitative
b. reproducible
c. obvious
d. all of the above - Correct Answer B
During a lesson, teachers should keep in mind that they need to demonstrate to their
students how to
a. understand, organize, and remember information
b. organization, emphasize, and understand information
c. emphasize, understand and remember information
d. organize, understand, and remember information - Correct Answer D
Which of the following compounds is not allowed in a school laboratory because it is a
potential carcinogen?
a. lead
b. benzene
c. aspartame
d. methanol - Correct Answer B
A laboratory experiment requires hat red blood cells be separated from the serum in
whole blood. Which of the following laboratory techniques would be most appropriate for
this task?
a. spectroscopy
b. sublimation
c. microscopy
d. centrifugation - Correct Answer D
which of the following quantities is the largest in the metric system of measurements?
a. 10 decigrams
, b. 100 milligrams
c. 100 grams
d. 1 decagram - Correct Answer C
In a lesson on invertebrates, an instructor plans to show the students the fly eye. He has
dissected a fly ans mounted a sample on a slide, but the students arent able to make out
the structure. He should advise his students to
a. find pictures of the fly eye in a book
b. use a more powerful magnification on the microscope
c. stain the specimen
d. place the specimen on a dark background - Correct Answer C
Which of the following biological discoveries was made first?
a. Louis Pasteur discovered the causative role f microorganisms
b. charles darwin discovered the principles of natural selection
c. Gregor Mendel discovered that genes are the basic units for inheritance .
d. carl von linnaeus developed the binomial system of nomenclature for living things -
Correct Answer D
which of the following is a constant?
a. the freezing point of water
b. the temperature at which iron will melt
c. the human population size
d. the time the sun rises each day - Correct Answer A
The volume of water in a bucket is 2.5 liters. When an object with an irregular shape and
a mass of 40 grams is submerged in the water, the volume of the water is 4.5 liters. What
is the density of the object?
a. 1/10 g/L
b. 2g/L
c. 20g/L
d. 80 g/L - Correct Answer C
Answers.
A researcher is studying the response of bacteria to a certain chemical. In 3 experiments,
the bacteria swim towards the chemical, and in one experiment the bacteria swims away
from it. What would be the most appropriate next step for the researcher.
a. Report only the 1st three experiments.
b. Report all the experiments but refrain from making any conclusions.
c. Repeat the experiment several more times and apply a statistical analysis to the data.
d. Repeat the experiment, adding a new chemical to determine its effect on the bacteria. -
Correct Answer C
In a study investigating the cause of stomach ulcers, researchers observed that coffee
drinkers had a higher incidence of stomach ulcers than those who didn't drink coffee. This
is an example of:
a. a controlled experiment
b. a cause and effect relationship
c. correlation between two variables
d. systematic error in sampling - Correct Answer C
In terms of mass, which of the following represent the greatest amount of sucrose (Molar
mass=342 grams)?
a. 1 mole
b. 100 grams
c. 1L of a 0.1M solution
c. 100mL of a 1M solution - Correct Answer A
In an experiment on respiration, carbon dioxide production is measured over time.
Placing the data in a chart is
a. A visual representation of the data
b. a conclusion based on the data
c. the raw data
,d. a comparative analysis of the data - Correct Answer A
In order to be included in the formation of a scientific conclusion, evidence must be
a. quantitative
b. reproducible
c. obvious
d. all of the above - Correct Answer B
During a lesson, teachers should keep in mind that they need to demonstrate to their
students how to
a. understand, organize, and remember information
b. organization, emphasize, and understand information
c. emphasize, understand and remember information
d. organize, understand, and remember information - Correct Answer D
Which of the following compounds is not allowed in a school laboratory because it is a
potential carcinogen?
a. lead
b. benzene
c. aspartame
d. methanol - Correct Answer B
A laboratory experiment requires hat red blood cells be separated from the serum in
whole blood. Which of the following laboratory techniques would be most appropriate for
this task?
a. spectroscopy
b. sublimation
c. microscopy
d. centrifugation - Correct Answer D
which of the following quantities is the largest in the metric system of measurements?
a. 10 decigrams
, b. 100 milligrams
c. 100 grams
d. 1 decagram - Correct Answer C
In a lesson on invertebrates, an instructor plans to show the students the fly eye. He has
dissected a fly ans mounted a sample on a slide, but the students arent able to make out
the structure. He should advise his students to
a. find pictures of the fly eye in a book
b. use a more powerful magnification on the microscope
c. stain the specimen
d. place the specimen on a dark background - Correct Answer C
Which of the following biological discoveries was made first?
a. Louis Pasteur discovered the causative role f microorganisms
b. charles darwin discovered the principles of natural selection
c. Gregor Mendel discovered that genes are the basic units for inheritance .
d. carl von linnaeus developed the binomial system of nomenclature for living things -
Correct Answer D
which of the following is a constant?
a. the freezing point of water
b. the temperature at which iron will melt
c. the human population size
d. the time the sun rises each day - Correct Answer A
The volume of water in a bucket is 2.5 liters. When an object with an irregular shape and
a mass of 40 grams is submerged in the water, the volume of the water is 4.5 liters. What
is the density of the object?
a. 1/10 g/L
b. 2g/L
c. 20g/L
d. 80 g/L - Correct Answer C
