PLEASE PLEASE PLEASE PLEASE HELP!!!!!

Question 1 (Multiple Choice Worth 2 points)

[BWS.06] Look at the picture.

Students hold their hands over a bonfire

The heat from the bonfire is transferred to the student's hands through the process of

conduction

convection

radiation

reflection

Question 3 (Multiple Choice Worth 2 points)

[BWS.03] Which of these statements is correct about a theory?

It cannot be contradicted.

It is accepted by a few scientists.

It does not explain observations.

It can be changed by current evidence.

Question 4 (Multiple Choice Worth 2 points)

[BWS.02]One student did an experiment to find if fertilizer can make plants grow taller. The steps of the experiment are listed below.

•Take three pots of the same size.
•Fill the pots completely with the same type of soil.
•Plant tomato seeds in the first pot, orange seeds in the second pot, and bean seeds in the third pot.
•Add different amounts of fertilizer to the three pots.
•Keep the pots in the sunlight.
•Add the same amount of water to the pots every day.
•Measure the heights of the plants after regular intervals.
The results of the experiment were not valid. Which of these statements best describes a flaw in the experiment?
The increase in height of plants was the dependent variable.

The increase in height of plants was the independent variable.

The type of plants in the pots was not the controlled variable.

The amount of fertilizer was not the controlled variable.

Question 5 (Multiple Choice Worth 2 points)

[BWS.05] The diagram below shows two models of the atom.

Rutherford's and Bohr's model of atoms
The models can be best used to

change the structure of atoms

prove all theories on atomic structure incorrect

show that all elements are not composed of atoms

demonstrate the evolution in the structure of the atom

Question 6 (Multiple Choice Worth 2 points)

[BWS.02] Which of these statements best describes the role of creativity in science?

it helps scientists prove non-observable theories

it helps scientists make conclusions non-testable

it helps scientists give valid scientific explanations

it helps scientists create theories which are universal

Question 7 (Multiple Choice Worth 2 points)

[BWS.02] Sarah plans to go on an outing with her friends. On Saturday morning, the sky was cloudy and Sarah's barometer indicated that the air pressure was falling. When air pressure falls, it indicates the weather conditions will decline. The air pressure kept falling for the next three days and then started rising on the fourth day. Based on scientific knowledge, which of these was the most favorable day for Sarah to go on an outing?

Saturday

Sunday

Wednesday

Tuesday

Question 8 (Multiple Choice Worth 2 points)

[BWS.04] A group of students measured the average monthly temperature of 1000 cities around the world and plotted the cumulative frequency graph shown below.

A cumulative frequency graph. The label for the x-axis reads 'Average monthly temperature (in degrees Celsius).' The label for the y-axis reads 'Cumulative Frequency (number of cities).' The coordinates that make up the shape of the line are as follows: (0, 0), (50, 10), (50, 20), (400, 30), (700, 40), (950, 50), (1000, 60), (1000, 70).

Which of these conclusions is correct about the cities whose temperatures were measured by the students?

About 300 cities have an average monthly temperature of 60°C.

About 300 cities have an average monthly temperature of 20°C.

Almost 50% of the cities have an average monthly temperature less than or equal to 35°C.

Almost 50% of the cities have an average monthly temperature less than or equal to 20°C.

Question 9 (Multiple Choice Worth 2 points)

[BWS.02]Which of these is an example of an experiment?

plant growth is affected by temperature

leaves may change color due to temperature

add different quantities of water to three potted plants

the plant which gets the most sunlight grows the fastest

Question 10 (Multiple Choice Worth 2 points)

[BWS.05] Which of these forces help protons and neutrons to stay at the center of the atom?

gravitational force

electromagnetic force

weak nuclear force

strong nuclear force

Question 11 (Multiple Choice Worth 2 points)

[BWS.02] Which of these questions can be answered using scientific methods?

Who is the best author in English?

Should all students take the same classes?

Which is the tastiest flavor of ice cream?

What would be the effect of a hurricane?

Question 12 (Multiple Choice Worth 2 points)

[BWS.02]A scientist plans to find out the cause of decrease in bird population in a location. He interviews 50 people who work in the local oil mine and 45 of them believe that the mine does not affect the birds. The scientist concludes that 90 percent of people in the location believe that the local oil mine does not cause decrease in bird population. Why is the scientist's conclusion most likely unreliable?

the source of information could be biased

the investigation is done by only one person

bird population cannot be measured accurately

the results of the investigation cannot be repeated

Question 13 (Multiple Choice Worth 2 points)

[BWS.05] The table below shows two conclusions about atoms based on experiments by Thompson and Bohr.

Name of scientist Experimental Process Conclusion about atoms
Thompson Scatter radioactive particles It is a spherical object containing electrons in a massive positive charge distribution
Bohr Check the spinning motion of electrons Electrons are found outside the nucleus of the atom at various levels called shells, arranged like layers of an onion

Which of these statements best explains why Thompson and Bohr visualized the atom differently?
Atoms change their structure and particles from time to time.

Atoms cannot be described easily with the help of only one model.

Scientists do not agree with each other to strengthen science.

Scientists with varied experimental processes and interests perceive things differently.

Question 14 (Multiple Choice Worth 2 points)

[BWS.02] A scientist is investigating the cause of contamination of well water at a specific location. Four residents of the location responded to questions asked by the scientist. The chart below shows their responses.

Questions Resident 1's answer Resident 2's answer Resident 3's answer Resident 4's answer
Do you work at the gas station near the well? No Yes No Yes
Does anyone in your family work at the gas station? No No Yes Yes
Have you observed any change in the quality of well water? Yes No Yes Yes

Which of these residents is most likely to provide reliable information?
Resident 1

Resident 2

Resident 3

Resident 4

Question 15 (Multiple Choice Worth 2 points)

[BWS.02]Scientific argumentation makes scientific results

stronger

invalid

permanent

biased

Question

PLEASE PLEASE PLEASE PLEASE HELP!!!!!

Question 1 (Multiple Choice Worth 2 points)

[BWS.06] Look at the picture.

Students hold their hands over a bonfire

The heat from the bonfire is transferred to the student's hands through the process of

conduction

convection

radiation

reflection

Question 3 (Multiple Choice Worth 2 points)

[BWS.03] Which of these statements is correct about a theory?

It cannot be contradicted.

It is accepted by a few scientists.

It does not explain observations.

It can be changed by current evidence.

Question 4 (Multiple Choice Worth 2 points)

[BWS.02]One student did an experiment to find if fertilizer can make plants grow taller. The steps of the experiment are listed below.

•Take three pots of the same size.
•Fill the pots completely with the same type of soil.
•Plant tomato seeds in the first pot, orange seeds in the second pot, and bean seeds in the third pot.
•Add different amounts of fertilizer to the three pots.
•Keep the pots in the sunlight.
•Add the same amount of water to the pots every day.
•Measure the heights of the plants after regular intervals.
The results of the experiment were not valid. Which of these statements best describes a flaw in the experiment? 
 The increase in height of plants was the dependent variable.

The increase in height of plants was the independent variable.

The type of plants in the pots was not the controlled variable.

The amount of fertilizer was not the controlled variable.

Question 5 (Multiple Choice Worth 2 points)

[BWS.05] The diagram below shows two models of the atom.

Rutherford's and Bohr's model of atoms 
The models can be best used to

change the structure of atoms

prove all theories on atomic structure incorrect

show that all elements are not composed of atoms

demonstrate the evolution in the structure of the atom

Question 6 (Multiple Choice Worth 2 points)

[BWS.02] Which of these statements best describes the role of creativity in science?

it helps scientists prove non-observable theories

it helps scientists make conclusions non-testable

it helps scientists give valid scientific explanations

it helps scientists create theories which are universal

Question 7 (Multiple Choice Worth 2 points)

[BWS.02] Sarah plans to go on an outing with her friends. On Saturday morning, the sky was cloudy and Sarah's barometer indicated that the air pressure was falling. When air pressure falls, it indicates the weather conditions will decline. The air pressure kept falling for the next three days and then started rising on the fourth day. Based on scientific knowledge, which of these was the most favorable day for Sarah to go on an outing?

Saturday

Sunday

Wednesday

Tuesday

Question 8 (Multiple Choice Worth 2 points)

[BWS.04] A group of students measured the average monthly temperature of 1000 cities around the world and plotted the cumulative frequency graph shown below.

A cumulative frequency graph. The label for the x-axis reads 'Average monthly temperature (in degrees Celsius).' The label for the y-axis reads 'Cumulative Frequency (number of cities).' The coordinates that make up the shape of the line are as follows: (0, 0), (50, 10), (50, 20), (400, 30), (700, 40), (950, 50), (1000, 60), (1000, 70).

Which of these conclusions is correct about the cities whose temperatures were measured by the students?

About 300 cities have an average monthly temperature of 60°C.

About 300 cities have an average monthly temperature of 20°C.

Almost 50% of the cities have an average monthly temperature less than or equal to 35°C.

Almost 50% of the cities have an average monthly temperature less than or equal to 20°C.

Question 9 (Multiple Choice Worth 2 points)

[BWS.02]Which of these is an example of an experiment?

plant growth is affected by temperature

leaves may change color due to temperature

add different quantities of water to three potted plants

the plant which gets the most sunlight grows the fastest

Question 10 (Multiple Choice Worth 2 points)

[BWS.05] Which of these forces help protons and neutrons to stay at the center of the atom?

gravitational force

electromagnetic force

weak nuclear force

strong nuclear force

Question 11 (Multiple Choice Worth 2 points)

[BWS.02] Which of these questions can be answered using scientific methods?

Who is the best author in English?

Should all students take the same classes?

Which is the tastiest flavor of ice cream?

What would be the effect of a hurricane?

Question 12 (Multiple Choice Worth 2 points)

[BWS.02]A scientist plans to find out the cause of decrease in bird population in a location. He interviews 50 people who work in the local oil mine and 45 of them believe that the mine does not affect the birds. The scientist concludes that 90 percent of people in the location believe that the local oil mine does not cause decrease in bird population. Why is the scientist's conclusion most likely unreliable?

the source of information could be biased

the investigation is done by only one person

bird population cannot be measured accurately

the results of the investigation cannot be repeated

Question 13 (Multiple Choice Worth 2 points)

[BWS.05] The table below shows two conclusions about atoms based on experiments by Thompson and Bohr.

Name of scientist Experimental Process Conclusion about atoms 
Thompson Scatter radioactive particles It is a spherical object containing electrons in a massive positive charge distribution 
Bohr Check the spinning motion of electrons Electrons are found outside the nucleus of the atom at various levels called shells, arranged like layers of an onion

Which of these statements best explains why Thompson and Bohr visualized the atom differently? 
 Atoms change their structure and particles from time to time.

Atoms cannot be described easily with the help of only one model.

Scientists do not agree with each other to strengthen science.

Scientists with varied experimental processes and interests perceive things differently.

Question 14 (Multiple Choice Worth 2 points)

[BWS.02] A scientist is investigating the cause of contamination of well water at a specific location. Four residents of the location responded to questions asked by the scientist. The chart below shows their responses.

Questions Resident 1's answer Resident 2's answer Resident 3's answer Resident 4's answer 
Do you work at the gas station near the well? No Yes No Yes 
Does anyone in your family work at the gas station? No No Yes Yes 
Have you observed any change in the quality of well water? Yes No Yes Yes

Which of these residents is most likely to provide reliable information? 
 Resident 1

Resident 2

Resident 3

Resident 4

Question 15 (Multiple Choice Worth 2 points)

[BWS.02]Scientific argumentation makes scientific results

stronger

invalid

permanent

biased

spring98 · Answer

number 3 is D!!! :)