A scientist plans to find out the percent of teenagers who like science. She interviews 500 teenagers leaving a science museum and finds that 450 of them like science. The scientist concludes that 90 percent of teenagers like science. Why is the scientist's conclusion most likely unreliable?

adults were not interviewed
the investigation was time consuming***
the source of information was biased
very few teenagers were interviewed

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

Idk this one

1. B
2.????

1. C

2. C or D

1. C - yes

2. C or D - Only one of these describes an experiment.

The scientist's conclusion is most likely unreliable because the source of information was biased. The scientist only interviewed teenagers who were leaving a science museum, which means that the sample may not be representative of all teenagers. The conclusion would have been more reliable if the scientist had interviewed a random and diverse sample of teenagers from different locations and backgrounds.

Regarding the second question, an experiment typically involves manipulating variables and observing the effect on the outcomes. In this case, the option "add different quantities of water to three potted plants" seems to be an example of an experiment. By manipulating the amount of water given to each plant and observing the difference in growth, the scientist can determine if plant growth is affected by the quantity of water.

1 B is incorrect. Why would random teens visit a science museum?

2. Check your text or Google to find the meaning of "experiment."