ACT Science : ACT Science

Study concepts, example questions & explanations for ACT Science

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Example Questions

Example Question #122 : How To Find Research Summary In Biology

Two scientists are examining the fragmented skeletal remains of an unidentified person. To begin work on identification, they must start by determining several characteristics about the individual, including sex. When determining sex, a measurement index can be used. Measurements can be taken from various points on the skeleton, such as the scapula or the femur, which then correspond to documented averages for different sexes, which vary with ancestry. In this individual of Latin American ancestry, the scapular breadth has measured 22.0cm, which is the only true sex-determining measurement that can be taken from these remains. In their reference books, the scientists find that this measurement in Latin American females ranges from 18.0-22.0cm and 22.0-24.0cm for Latin American males. Both scientists make a case using other supporting evidence as to which sex this unidentified individual may be.

Scientist 1

Sex can be clearly defined through context clues. Items found with the body and the way the body was found can both be used to determine the sex of the individual in cases such as this which lack other sex-determining measurements. The remains were found with small tennis shoes (size 8), which would generally be indicative of a female. The bag found with the body contained waterlogged copies of several popular magazines, as well as a broken cell phone, nail clippers, and a tube of lip balm. These items are generally more associated with items commonly carried by and used by female individuals rather than males. Because of abundant context clues, this individual can be determined to be female despite ambiguous measurements. 

Scientist 2

Clues about the sex of the individual can come from multiple sources. Context clues, such as the items found with the body, can help. The small shoes and stereotypically female-associated objects found with the remains can give an indication that the person must likely have been female. Another way to help determine sex is through estimated overall stature of the person – men are generally larger and more robustly built than females of the same ancestry. A rough estimation of stature of this individual would indicate that they were about 5’10” tall and heavily muscled. While not impossible for a female, this is a build that is much more likely to belong to a male individual. Though the context clues seem to point toward a female, the stature of the individual strongly suggests male.

Based on the views of Scientist 1, if an individual was found with no objects, what might they conclude?

Possible Answers:

There is not enough evidence to determine sex based

The individual is likely female

The individual is likely male

Body measurements are very accurate and may be used to determine sex

Correct answer:

There is not enough evidence to determine sex based

Explanation:

Scientist 1 relies mainly on context clues to determine sex, so if there were no context clues, they would not be able to determine the sex of the individual.

Example Question #123 : How To Find Research Summary In Biology

Two scientists are examining the fragmented skeletal remains of an unidentified person. To begin work on identification, they must start by determining several characteristics about the individual, including sex. When determining sex, a measurement index can be used. Measurements can be taken from various points on the skeleton, such as the scapula or the femur, which then correspond to documented averages for different sexes, which vary with ancestry. In this individual of Latin American ancestry, the scapular breadth has measured 22.0cm, which is the only true sex-determining measurement that can be taken from these remains. In their reference books, the scientists find that this measurement in Latin American females ranges from 18.0-22.0cm and 22.0-24.0cm for Latin American males. Both scientists make a case using other supporting evidence as to which sex this unidentified individual may be.

Scientist 1

Sex can be clearly defined through context clues. Items found with the body and the way the body was found can both be used to determine the sex of the individual in cases such as this which lack other sex-determining measurements. The remains were found with small tennis shoes (size 8), which would generally be indicative of a female. The bag found with the body contained waterlogged copies of several popular magazines, as well as a broken cell phone, nail clippers, and a tube of lip balm. These items are generally more associated with items commonly carried by and used by female individuals rather than males. Because of abundant context clues, this individual can be determined to be female despite ambiguous measurements. 

Scientist 2

Clues about the sex of the individual can come from multiple sources. Context clues, such as the items found with the body, can help. The small shoes and stereotypically female-associated objects found with the remains can give an indication that the person must likely have been female. Another way to help determine sex is through estimated overall stature of the person – men are generally larger and more robustly built than females of the same ancestry. A rough estimation of stature of this individual would indicate that they were about 5’10” tall and heavily muscled. While not impossible for a female, this is a build that is much more likely to belong to a male individual. Though the context clues seem to point toward a female, the stature of the individual strongly suggests male.

What other evidence might Scientist 2 look for to best support his/her claim?

Possible Answers:

Research on Latin American ancestry

Historical cases of female Asian individuals

Historical cases of Latin American male individuals

Information about the town where the individual was found

Correct answer:

Historical cases of Latin American male individuals

Explanation:

Historical cases would be useful to compare this new but similar case to. The other information is not be relevant and would not support Scientist 2's claim.

Example Question #263 : Biology

Two scientists are examining the fragmented skeletal remains of an unidentified person. To begin work on identification, they must start by determining several characteristics about the individual, including sex. When determining sex, a measurement index can be used. Measurements can be taken from various points on the skeleton, such as the scapula or the femur, which then correspond to documented averages for different sexes, which vary with ancestry. In this individual of Latin American ancestry, the scapular breadth has measured 22.0cm, which is the only true sex-determining measurement that can be taken from these remains. In their reference books, the scientists find that this measurement in Latin American females ranges from 18.0-22.0cm and 22.0-24.0cm for Latin American males. Both scientists make a case using other supporting evidence as to which sex this unidentified individual may be.

Scientist 1

Sex can be clearly defined through context clues. Items found with the body and the way the body was found can both be used to determine the sex of the individual in cases such as this which lack other sex-determining measurements. The remains were found with small tennis shoes (size 8), which would generally be indicative of a female. The bag found with the body contained waterlogged copies of several popular magazines, as well as a broken cell phone, nail clippers, and a tube of lip balm. These items are generally more associated with items commonly carried by and used by female individuals rather than males. Because of abundant context clues, this individual can be determined to be female despite ambiguous measurements. 

Scientist 2

Clues about the sex of the individual can come from multiple sources. Context clues, such as the items found with the body, can help. The small shoes and stereotypically female-associated objects found with the remains can give an indication that the person must likely have been female. Another way to help determine sex is through estimated overall stature of the person – men are generally larger and more robustly built than females of the same ancestry. A rough estimation of stature of this individual would indicate that they were about 5’10” tall and heavily muscled. While not impossible for a female, this is a build that is much more likely to belong to a male individual. Though the context clues seem to point toward a female, the stature of the individual strongly suggests male.

How might Scientist 2 respond to Scientist 1’s methods?

Possible Answers:

Scientist 2 would say that Scientist 1 needs more information about Latin American religious practices

Scientist 2 would say that Scientist 1 needs more information about shoes

Scientist 2 would agree with Scientist 1’s methods

Scientist 2 would say that Scientist 1 needs more evidence than just one method can provide

Correct answer:

Scientist 2 would say that Scientist 1 needs more evidence than just one method can provide

Explanation:

While the other objections might also be made, the fact that Scientist 1 only uses one source of proof would likely bother Scientist 2 (who uses multiple methods) the most.

Example Question #264 : Biology

Two scientists are examining the fragmented skeletal remains of an unidentified person. To begin work on identification, they must start by determining several characteristics about the individual, including sex. When determining sex, a measurement index can be used. Measurements can be taken from various points on the skeleton, such as the scapula or the femur, which then correspond to documented averages for different sexes, which vary with ancestry. In this individual of Latin American ancestry, the scapular breadth has measured 22.0cm, which is the only true sex-determining measurement that can be taken from these remains. In their reference books, the scientists find that this measurement in Latin American females ranges from 18.0-22.0cm and 22.0-24.0cm for Latin American males. Both scientists make a case using other supporting evidence as to which sex this unidentified individual may be.

Scientist 1

Sex can be clearly defined through context clues. Items found with the body and the way the body was found can both be used to determine the sex of the individual in cases such as this which lack other sex-determining measurements. The remains were found with small tennis shoes (size 8), which would generally be indicative of a female. The bag found with the body contained waterlogged copies of several popular magazines, as well as a broken cell phone, nail clippers, and a tube of lip balm. These items are generally more associated with items commonly carried by and used by female individuals rather than males. Because of abundant context clues, this individual can be determined to be female despite ambiguous measurements. 

Scientist 2

Clues about the sex of the individual can come from multiple sources. Context clues, such as the items found with the body, can help. The small shoes and stereotypically female-associated objects found with the remains can give an indication that the person must likely have been female. Another way to help determine sex is through estimated overall stature of the person – men are generally larger and more robustly built than females of the same ancestry. A rough estimation of stature of this individual would indicate that they were about 5’10” tall and heavily muscled. While not impossible for a female, this is a build that is much more likely to belong to a male individual. Though the context clues seem to point toward a female, the stature of the individual strongly suggests male.

If the scapular breadth was 23.0cm instead of 22.0cm, how might Scientist 1 respond?

Possible Answers:

They would no longer believe that context clues matter

They would use another method of determining sex in combination with context clues to check their answer

They would disagree with Scientist 2

They would not change their answer

Correct answer:

They would use another method of determining sex in combination with context clues to check their answer

Explanation:

Because the measurement is more similar to males according to the given information in the problem, Scientist 1 would likely find something else to use as proof since the context clues indicate female instead of male.

Example Question #261 : Act Science

Two scientists are examining the fragmented skeletal remains of an unidentified person. To begin work on identification, they must start by determining several characteristics about the individual, including sex. When determining sex, a measurement index can be used. Measurements can be taken from various points on the skeleton, such as the scapula or the femur, which then correspond to documented averages for different sexes, which vary with ancestry. In this individual of Latin American ancestry, the scapular breadth has measured 22.0cm, which is the only true sex-determining measurement that can be taken from these remains. In their reference books, the scientists find that this measurement in Latin American females ranges from 18.0-22.0cm and 22.0-24.0cm for Latin American males. Both scientists make a case using other supporting evidence as to which sex this unidentified individual may be.

Scientist 1

Sex can be clearly defined through context clues. Items found with the body and the way the body was found can both be used to determine the sex of the individual in cases such as this which lack other sex-determining measurements. The remains were found with small tennis shoes (size 8), which would generally be indicative of a female. The bag found with the body contained waterlogged copies of several popular magazines, as well as a broken cell phone, nail clippers, and a tube of lip balm. These items are generally more associated with items commonly carried by and used by female individuals rather than males. Because of abundant context clues, this individual can be determined to be female despite ambiguous measurements. 

Scientist 2

Clues about the sex of the individual can come from multiple sources. Context clues, such as the items found with the body, can help. The small shoes and stereotypically female-associated objects found with the remains can give an indication that the person must likely have been female. Another way to help determine sex is through estimated overall stature of the person – men are generally larger and more robustly built than females of the same ancestry. A rough estimation of stature of this individual would indicate that they were about 5’10” tall and heavily muscled. While not impossible for a female, this is a build that is much more likely to belong to a male individual. Though the context clues seem to point toward a female, the stature of the individual strongly suggests male.

Suppose the individual was eventually identified and proven to be female. Which methods would have proven most useful?

Possible Answers:

Height

Measurements

Ancestry

Context clues

Correct answer:

Context clues

Explanation:

Because the context clues pointed to the individual being a female and the rest of the information was ambiguous, the context clues were the most important.

Example Question #125 : How To Find Research Summary In Biology

Two scientists are examining the fragmented skeletal remains of an unidentified person. To begin work on identification, they must start by determining several characteristics about the individual, including sex. When determining sex, a measurement index can be used. Measurements can be taken from various points on the skeleton, such as the scapula or the femur, which then correspond to documented averages for different sexes, which vary with ancestry. In this individual of Latin American ancestry, the scapular breadth has measured 22.0cm, which is the only true sex-determining measurement that can be taken from these remains. In their reference books, the scientists find that this measurement in Latin American females ranges from 18.0-22.0cm and 22.0-24.0cm for Latin American males. Both scientists make a case using other supporting evidence as to which sex this unidentified individual may be.

Scientist 1

Sex can be clearly defined through context clues. Items found with the body and the way the body was found can both be used to determine the sex of the individual in cases such as this which lack other sex-determining measurements. The remains were found with small tennis shoes (size 8), which would generally be indicative of a female. The bag found with the body contained waterlogged copies of several popular magazines, as well as a broken cell phone, nail clippers, and a tube of lip balm. These items are generally more associated with items commonly carried by and used by female individuals rather than males. Because of abundant context clues, this individual can be determined to be female despite ambiguous measurements. 

Scientist 2

Clues about the sex of the individual can come from multiple sources. Context clues, such as the items found with the body, can help. The small shoes and stereotypically female-associated objects found with the remains can give an indication that the person must likely have been female. Another way to help determine sex is through estimated overall stature of the person – men are generally larger and more robustly built than females of the same ancestry. A rough estimation of stature of this individual would indicate that they were about 5’10” tall and heavily muscled. While not impossible for a female, this is a build that is much more likely to belong to a male individual. Though the context clues seem to point toward a female, the stature of the individual strongly suggests male.

Which scientist had the stronger given argument?

Possible Answers:

Scientist 2, because he/she used multiple kinds of evidence to prove their point.

Scientist 1, because he/she used context clues.

Scientist 2, because he/she used ancestry and measurements.

Neither, the two arguments are equal.

Correct answer:

Scientist 2, because he/she used multiple kinds of evidence to prove their point.

Explanation:

Because multiple sources of proof strengthen an argument, Scientist 2 had the best argument.

Example Question #261 : Act Science

Act science practice set 1 q 1 page 001

According to Survey 1 and Survey 2, which variable tested by the botanist had the greatest impact on average tree height?

Possible Answers:

Insect abundance

Ground soil moisture

Light level

All of these variables had an equal impact

Correct answer:

Light level

Explanation:

It is clear from Table 1 and Table 2 that light level had the largest impact on average tree height. Following across many of the table rows shows that light level has a large impact, up to 7.5', on average tree height from Very Dim to Very Bright, where the other two variables only have at most a 4.3' impact.

Example Question #262 : Act Science

Act science practice set 1 q 1 page 001

Based on both Survey 1 and Survey 2, what can the botanist conclude about what will factors will encourage maximum tree growth, considering that the forest is mostly average and bright light level areas?

Possible Answers:

The trees grow the same height no matter what factors are involved

Keeping up soil moisture is more significant than keeping down insect abundance

There is not a difference in height between Average and Bright light level areas

Insects, on average, are the most detrimental factor to tree growth

Correct answer:

Keeping up soil moisture is more significant than keeping down insect abundance

Explanation:

The correct answer is that ground soil moisture is more significant than insect abundance. If you compare the average and bright light level columns in Table 1 and Table 2, you can see that there is much more of a difference in height by ground soil moisture than insect abundance.

Example Question #263 : Act Science

Act science practice set 1 q 2 page 001

Considering that the normal human body temperature is 37 degrees Celsius and the normal body pH is 7.4, what can the researcher conclude about the effectiveness of this antibiotic in humans?

Possible Answers:

This antibiotic is at its least effective conditions

This antibiotic is most effective at a temperature of 37 degrees C, but not at a pH of 7.4

This antibiotic is at its most effective conditions

These variables are not represented in the scientist's experiments

Correct answer:

This antibiotic is at its least effective conditions

Explanation:

The correct answer is that the antibiotic is at its least effective at a temperature of 37 degrees Celsius and a pH of 7.4, although there is not a great deal of difference. This could be significant for dosages of this antibiotic, however.

Example Question #261 : Biology

Act science practice set 1 q 2 page 001

Which statement best describes the outcome of the experiments in this study?

Possible Answers:

Temperature changes have more of an effect on this antibiotic's effectiveness than pH changes

This antibiotic will only effectively destroy bacteria at a temperature of  degrees Celsius or lower

This antibiotic is at least  effective at doses of  or higher

pH changes have more of an effect on this antibiotic's effectiveness than temperature changes

Correct answer:

This antibiotic is at least  effective at doses of  or higher

Explanation:

The correct answer is that this antibiotic is at least 90% effective at all doses greater than . No matter what the value of the two variables (experimental temperature and experimental pH), the antibiotic kills greater than 90% of the bacteria in the experiment when it is at least .

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