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Fact Crossword Puzzle 2 (Facts 1-30)

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Across
1.Scientists make _______ to forecast what will happen in the future based on past experience or evidence (Fact 10)
4.The _______ unit (A.U.) is used to measure the average distance between the Earth and the sun (Fact 27)
7.A scientific ______ is a well-tested explanation for a wide range of observations or experimental results (Fact 3)
11.The sun is a medium sized star made mostly of the elements hydrogen and ______ (Fact 29)
12.Scientists make _______ when they use their senses to gain information. (Fact 8)
14.After scientists analyze the data from an investigation, they draw a _________ about the correctness of their hypothesis. (Fact 22)
16.In a controlled experiment, the ________ variables are the factors that are intentionally kept the same. (Fact 15)
17.In a controlled experiment, the variable that is expected to change because of the manipulated variable is the _____ or dependent variable (Fact 17)
18.A ________ is a factor that can be tested in a controlled experiment. (Fact 14)
19.The final step in an investigation is the publication and communication of the _____ (Fact 24)
Down
2.The sun produces energy through _______ _______ (Fact 30)
3.A scientific ________ is a statement that describes what scientists expext to happen uder a particular set of condtions. (Fact 4)
5.The solar system formed about 4.6 billion years ago from a huge cloud of dust and gas called the solar _____ (Fact 26)
6.A _______ is a scientist's best prediction about that answer to a question or a solution to a proble; a good one of these must be testable (Fact 12)
7.Measurements are observations made with ______ (Fact 11)
8.________ ______ are often used to show relationships between the manipulated and responding variable in an investigation. (Fact 21)
9.In a controlled experiment, the variable that is purposely changed is the _______ or independent variable (Fact 16)
10.The ______ ______ is composed of the sun, planets, and other bodies that travel around the sun (Fact 25)
13.Scientists make _______ or reasoned judgments to explain observations (Fact 9)
15.Graphs are used to analyze and reveal patterns or trends in collected data during an investigation. Graphs can be thought of as _____ of collected data (Fact 20)

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