One group of students is investigating the properties of the bar magnet shown below. The students took a bowl of iron nails, plastic pieces, wood shavings, and paper pieces. The bar magnet was placed inside the bowl for some time and then taken out. Several iron nails were stuck on the bar magnet. The experiment was repeated by several students using different bar magnets. Based on the investigations, which of these theories would the students most likely propose? (2 points)

The diagram below shows two models of the atom. The models can be best used to (2 points)

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)

Which of these is a part of the geosphere? (2 points)

Which of these questions can be answered through science? (2 points)

One 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)

One 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)

Jim 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)

Predictions about the future based on the position of planets is an example of (2 points)

Two scientists did the same experiment but arrived at different results. The results would most likely (2 points)