Term
| A student wants to find out whether pill bugs will stay on the dark side or the lit side of a box. When he writes his hypothesis, what will be the independent variable? |
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Definition
| The amount of light on each side of the box. |
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Term
| A student grew 2 plants to test the effects of fertilizer on plant growth. Her results showed that the plant that got the fertilizer grew more slowly than the plant that did not get fertilizer. How can she verify her results? |
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Definition
| Repeat the experiment 4 more times, using 2 plants each time. |
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Term
| A group of students is conducting scientific research and writing a report about making money through school fundraisers. The school fundraiser sells popcorn in snack-size bags for $1 and extra large bags for $6. The extra large bag contains 10 times more popcorn than the snack-size bag, so the extra large bag is a better value. The students hypothesize that value is the most important factor when buyers make a fundraiser purchase. They collect the following data. Does the evidence support the students’ hypothesis?[image] |
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Definition
| No, because the evidence showed more sales of lower value snack-size bags than higher value extra large bags. |
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Term
| Sebastian drew a figure to illustrate Boyle’s law, which explains the relationship between pressure and volume for a gas kept at constant temperature. His figure looked like the one shown below. Based on the figure, what happens to a gas due to pressure?[image] |
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Definition
| The volume of gas decreases as pressure increases, as particles get closer together. |
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Term
| Kathleen made the diagram below to show how scientific knowledge changes over time. Which word or phrase best describes what scientists would do at the point indicated by the blank?[image] |
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Definition
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Term
| Which of the following is a scientific law? |
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Definition
| Any two objects exert a gravitational force of attraction on each other. |
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Term
| The data table shows the percentages of animals at risk of extinction in a certain area. What percentage of reptiles and amphibians are considered either threatened or endangered?[image] |
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| Data in a table can be shown in a graph. This table shows the average life expectancy for males in the United States. Which type of graph would best show the change in average life expectancy?[image] |
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| Sean investigated the density of water at different temperatures. The graph shows his findings. At what temperature does water reach its maximum density?[image] |
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Term
| During which step of the engineering design process would a prototype most likely be created? |
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| To make the following working model of a solar-powered car, the design team first determined which materials have previously been used to create similar models. What engineering skill would have been most necessary to answer this question?[image] |
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| The following table lists characteristics of four different materials. What type of material is Material D?[image] |
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Term
| For which of the following applications is a meter stick most appropriate? |
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Definition
| Determining the proportions that a shelf must have to fit on top of a desk. |
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Term
| The following Pugh Chart lists characteristics of various types of transportation over a distance of 200 miles. According to this chart, what is the least desirable way to travel a distance of 200 miles?[image] |
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Definition
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Term
| Turning up the heat during cold weather increases one’s comfort, but the technology requires electricity. Most electricity is generated by burning fossil fuels, which pollutes the air. To reduce electricity use, energy companies suggest that people turn down the heat when they’re not home and wear heavier clothes when they are home. What best describes this practice? |
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Definition
| A trade-off in which a certain benefit is lost to minimize a harmful effect. |
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