Sci tast

Click to view The data table shows the percentages of animals at risk of extinction in a certain area. Endangered (%) Threatened (%) Birds 9.5 4.0 Reptiles and amphibians 12.0 3.5 Fish 14.1 7.6 Mollusks 24.0 4.0 What percentage of reptiles and amphibians are considered either threatened or endangered?

You Answered 12.0

Click to view Scientists do many types of work. Their work often includes making field observations, conducting surveys, creating models, and carrying out experiments. Which description characterizes an experiment?

You Answered physical or mathematical representation of an object or process

Three different lab groups perform experiments to determine the density of samples of iron. They have all rounded the density to the nearest whole number.

8 g

Click to view Many people who are not considered scientists still act as scientists in their work. Take a look at the following illustration. mc010-1.jpg What would this person do if he were acting like a scientist?

Figure out what went wrong and try to correct the error.

Click to view Scientists use different types of tools to investigate how and why things happen. Here are some examples of these tools: • a diagram of a food chain in the Everglades • a plastic replica of the human digestive system • a mathematical equation for finding the speed of an object Which word describes all of these examples?

model

Click to view Dr. Simmons wants to make sure her scientific investigation is considered good. She knows that for an experiment to produce valid results, it must adhere to accepted methods. Which procedure would she not include as part of her valid scientific experiment?

organized procedure