U1 SCIENTISTS AT WORK: Question Preview (ID: 30862)


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Which of these is the metric unit for measuring mass?
a) liter b) kilogram c) millimeter d) pound
Which of the following is not a scientific investigation?
a) performing a controlled experiment b) using a model to test a hypothesis c) observing how five caterpillars change into butterflies d) writing a letter about why it's important to protect plants and animals
Which of the following is always an important part of an experiment?
a) making a working model b) observing things in nature c) making drawings of things observed d) identifying and controlling variables
A science class went on a field trip to study the organisms that live in a stream near the school. Which of these tools would be most useful for making observations about the animals living in the stream?
a) a graduated cylinder b) a net c) a telescope d) a scale
Scientists communicate their results by publishing their work. Why is it important for scientists to do this?
a) to keep their work secret b) to learn from each other c) to compete with other scientists d) so the experiments are not repeated
Each measuring tool is designed to measure a specific property of an object or material. Which of these tools can be used to measure the volume of a material?
a) spring scale b) balance c) measuring cup d) thermometer
Kyle is wondering what he is getting for his birthday. He decides to shake the box that contains his present. Kyle did not realize it, but he was acting like a scientist. What was the first step Kyle took in this situation that a scientist also takes
a) asking a question b) collecting evidence c) drawing a conclusion d) developing an explanation
Scientists always develop a plan when they try to learn something about our natural world. Which sequence correctly shows the steps scientists follow in their plan?
a) make observations → develop an idea → obtain evidence → suggest an explanation b) obtain evidence → suggest an explanation → develop an idea → make observations c) suggest an explanation → obtain evidence → make observations → develop an idea d) develop an idea → suggest an explanation → obtain evidence → make observations
Imagine that a scientist suggests that the size of an insect population depends on the temperature. What observations must this scientist make in order to collect evidence to support his or her hypothesis?
a) The scientist must observe the insect population only in winter. b) The scientist must observe the insect population in the laboratory. c) The scientist must observe the insect population in different areas. d) The scientist must observe the insect population throughout the year.
In science, we often gather information with our senses by watching, listening, smelling, and touching. For example, you may record how the color of a flower changes. What is this process called?
a) stating hypotheses b) forming conclusions c) making observations d) performing experiments
Which of the following would be best done using repeated observation rather than an experiment?
a) Determine whether a diet that includes honey every day will reduce allergies. b) Determine which type of flower gives out the strongest scent c) Determine the average number of times during a week in May that a group of bees visits flowers. d) Determine whether a bee hive is stronger than a wasp nest.
Aaron inferred that a train was approaching rapidly based on the way the noise from the train sounded. Which other skill is Sanjay using?
a) classifying b) communicating results c) planning an investigation d) using time/space relationships
Scientists usually write reports about their investigations. Why do they do this?
a) to classify results b) to ask questions c) to perform experimental trials d) to communicate their work to other scientists
Which statement demonstrates the most scientific observation?
a) The water is changing. b) The flame is causing a change. c) Bubbles are forming and rising. d) Steam forms when water gets hot.
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