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? (2 points)
Read DetailsOne student burned a piece of paper weighing 4.8 grams. The table below shows the mass of the materials formed by burning the paper. Material formed Mass of material (in grams) Ash ? Smoke 2.2 Dust 2.5 What is most likely the mass of the ash formed on burning the piece of paper? (2 points)
Read DetailsOne group of students is investigating the properties of charged objects. Their observations are listed below. When two positively charged objects are brought close to each other, they push each other away. When two negatively charged objects are brought close to each other, they push each other away. When a positively charged object is brought close to a negatively charged object, they pull toward each other. The experiment was repeated by several students using different charged objects. The results were the same. Based on the investigations, which of these theories would the students most likely propose? (2 points)
Read DetailsJim plans to plant coffee beans on the farm. Coffee needs warm, moist, and sunny climate. It always snows for four months, starting from November, in the location where Jim lives. The temperature is generally moderate from June to October. Based on scientific knowledge, which of these would be the best month to plant coffee? (2 points)
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