***Please know that I’m doing this not because I think cheating is right, but like me, we don’t have good teachers. I do feel bad about giving the answers, but I do not want anyone to fail because of a bad teacher. Please keep this in mind- wei yin***********
A researcher designs an experiment to determine if German Shepherds prefer pet doors that opens from the the top. He installs two pet doors side by side in the same wall. The per door that opens from the top is designed for pets up to 15 pounds. The one that opens from the side is designed for animals up to 220 pounds. The German shepherds in his study used the side opening pet door. The researcher determined that German Shepherds prefer pet doors that open from the side. This situation is an example of...
A: personal bias
B: cultural bias
C: experimental bias (my answer)
D: technological bias
A researcher, studying Dolphins in the wild, made the fallen skatelDolphins in the wild, made the following sketch. Each door on the map represents one dolphin. The area surveyed by the scientist was 1 km². Based on the researchers data, how many dolphins would you estimate to be in at 3 km² area.
A. 3
B. 7
C. 14
D. 21****
Multiply 7x3
You calculate the area of a 150 m times 100 m room. How many significant figures should your answer include?
A. 1
B. 2***
C. 3
D. 4
Which of the following correctly describes the graph?
A. The grass shows that the number of rabbits increase as the time increases***
Being able to identify good sources of scientific information and apply the knowledge to problems in your life is part of having....
C. Scientific literacy***
Which of the following is a reason why a scientist may reject a scientific theory?
C. New evidence contradicts it***
A scientist makes the measurement shown in the data table below. She needs to know the total volume of her samples. Which of the following shows the total volume reported with the correct numbers of digits and units?
B. 16.2 mL
Which component of the technological system is achieved when your camera takes a photograph?
C. Goal***
The ways in which people change the world around them to meet their needs or solve practical problems are called...
B. Technology ***
A group of parts that work together is called a...
B. System
In arsenal travels from earth to planet with less gravity than earth. Which of the following statements describe the astronauts weight and mass?
B. The astronauts will weight less in the other planet, but her mass will stay the same.***
A well tested explanation for a wide range of observations or experimental results is called a scientific....
c. Theory***
Many non-science careers require a knowledge of science because workers must...
B. Use materials and processes that follow scientific principles.***
A scientific hypothesis must be...
D. Able to be tested.***
Deciding whether to buy a new lightweight helmet that provides less protection than a heavier helmet is an example of....
A. Risk-benefit analysis****
To determine the correct answers to the questions, we can analyze the given information and options:
1. The situation described in the first question where the researcher determined that German Shepherds prefer pet doors that open from the side is an example of experimental bias. This is because the researcher's design of the experiment and the preference of the German Shepherds influenced the results.
2. In the second question, the researcher made a sketch of the area surveyed and determined the number of dolphins. Since the area surveyed was 1 km² and the researcher estimates the number of dolphins in a 3 km² area, the number of dolphins would be 3 times the number estimated in the original area. Therefore, the correct answer is 3 x 7 = 21 dolphins (Option D).
3. When calculating the area of a 150 m x 100 m room, the significant figures should be based on the least precise value, which is 100 m. The number of significant figures should match that of the least precise value, so the answer should include 2 significant figures (Option B).
4. The graph correctly describes that as time increases, the number of rabbits increases. Therefore the grass on the graph accurately shows this relationship (Option A).
5. Having the ability to identify good sources of scientific information and applying that knowledge to problems in your life is known as scientific literacy (Option C).
6. One of the reasons why a scientist may reject a scientific theory is if new evidence contradicts it (Option C).
7. The correct representation of the total volume reported for the given measurement of 16.2 mL with the correct number of digits and units is 16.2 mL (Option B).
8. The component of the technological system achieved when a camera takes a photograph is the goal, as taking a photograph is the intended purpose of the camera (Option C).
9. The ways in which people change the world around them to meet their needs or solve practical problems are called technology (Option B).
10. A group of parts that work together is called a system (Option B).
11. When a person travels from Earth to a planet with less gravity than Earth, their weight will be less on the other planet, but their mass will stay the same. Weight is influenced by the gravitational force, whereas mass is an intrinsic property of an object (Option B).
12. A well-tested explanation for a wide range of observations or experimental results is called a scientific theory (Option C).
13. Many non-science careers require a knowledge of science because workers often need to use materials and processes that follow scientific principles (Option B).
14. A scientific hypothesis must be able to be tested to determine its validity (Option D).
15. Deciding whether to buy a new lightweight helmet that provides less protection than a heavier helmet is an example of risk-benefit analysis. This involves weighing the potential risks and benefits of a decision before making a choice (Option A).
Please note that while it's important to understand the correct answers and explanations, it's also essential to develop critical thinking skills and make an effort to learn the material rather than relying solely on getting answers.