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# Unit 1 Review

Question | Answer |
---|---|

How do you calculate the mean? | Add the values together and divide by total number of values. |

How do you calculate the mode? | Find the most common value. |

How do you calculate the median? | Order the values least to greatest, find the middle number (or the average between the 2 middle numbers). |

How do you calculate the range? | Subtract the highest value minus the lowest value. |

What is the difference between an observation and an inference? | An observation is what you see (hear, touch, etc). An inference is an educated guess about what has happened or is happening. (You need observations to make an inference, but not vice versa.) |

What is the difference between an inference and a prediction? | An inference is an educated guess about what has happened or is happening. A prediction is an educated guess about what will happen in the future. |

What is the difference between the independent variable and the dependent variable? | Independent variable is what is changed by the experimenter (cause). Dependent variable is what is measured or observed (effect). |

What type of data is NECESSARY for a line graph? | 2 sets of quantitative data |

What type of data is NECESSARY for a bar or circle graph? | 1 set of quantitative data (**can have 2 sets, but only 1 set is required) |

What are the 5 steps of the scientific method? | QHEAC Question (problem) Hypothesis Experiment (Test) Analysis Conclusion |

What is a logical, empirical, flexible process of solving problems? | scientific method |

What is the difference between quantitative and qualitative data? | quantitative data involves NUMBERS, qualitative data involves descriptions/words |

How should the steps/procedures be written for an experiment? | clearly (need to understand), thoroughly (need to include everything), and in order (order should not be changed) |

Why should an experiment be tested more than once? | To be sure the results are accurate. |

What are the 3 branches of science? | physical, life, earth |

Name 3 science safety rules | follow instructions, be supervised, use care and ethical treatment of animals, don't eat/drink/chew gum, be neat and safe, notify teacher of unsafe situation, use safety equipment |

What are the 3 components of a hypothesis? | independent variable, prediction (dependent variable), science reasoning |

What is a constant? | Everything besides the independent variable that stays the same. |

What is volume? | The capacity of an object or how much space matter takes up. |

What is mass? | The amount of matter in an object. |

How do you compare mass? | pan balance/balance scale |

What is the formula for volume of a rectangular object? | Length x width x height |

What is the unit for volume when measuring length x width x height if each are in cm? | cubic centimeters |

How do you use the displacement method? | Subtract the original amount of liquid |

What is the unit for volume when using a graduated cylinder? | ml milliliter |

1 cubic centimeter is equal to | 1 milliliter |

Created by:
akguidry