The scientific theory of plate tectonics states that the Earth's crust is composed of many plates, or slabs of rock. Interactions of these plates have created different landforms, or geologic features. Which of the following statements provides evidence for this theory?

Which of the following statements is true regarding scientific hypotheses?

A computer is an example of technology that is used in science. For what purpose are computers used?

A new governor decides to take a different approach to the state budget. The new governor creates several different plans that allow the people to vote on what portion of the budget should be spent on scientific research. This example shows how ______ can affect science.

Scientific knowledge must be supported by evidence. An idea that is not supported by evidence but is made to appear scientific in order to make people think it is a part of science is called pseudoscience. Pseudoscience cannot be considered scientific because pseudoscientific ideas lack evidence. Which of the following ideas is considered scientific?

8. Scientific knowledge is most useful when trying to understand ______.

In the 1990s, scientists used satellite images to locate a giant asteroid crater in the Gulf of America. The crater, named Chicxulub, was formed about 65 million years ago. After discovering the crater, scientists used computer programs to model the effects of the asteroid's impact on the planet. Why did scientists have to use a model in order to study the asteroid's effects?

Scientific inquiry includes many different types of activities and processes. When someone makes measurements using scientific tools, what part of the inquiry process are they performing?

According to the scientific method, what should you do before you formulate a hypothesis?

Scientific knowledge can withstand the test of time because

In a controlled scientific experiment,

Shawn is planning a scientific experiment. He wants to learn whether time of day has an effect on how far the roses in his mother's garden are open. He plans to measure the diameter of each flower on three rosebushes every hour during a week in the spring.
What is the test variable (independent variable) in Shawn's experiment?

Mario believes he has found the reason that some things glow in the dark while others do not. What is the most important thing he will need to do before his theory will be accepted by other scientists?

Models can be used to obtain information about scientific processes and objects that may be difficult to study in real life. Which of the following scientific processes or objects would best be studied by using a model?

Rulers, scales, and thermometers are all examples of technologies that are used in science. For what purpose are these technologies primarily used?

What is a hypothesis?

Once the evaluation is complete, what should be done with the evaluation?

What should be done with scientific evidence?

Charles knows that adding salt to water causes the freezing point of water to be lowered, but he wants to know if rock salt affects the freezing point more than table salt. Charles performed an investigation in his classroom in which he measured the freezing point of 250 mL of water. He used this measurement as his control. Then, he dissolved equal amounts of rock salt and table salt in two identical 250 mL beakers of water. Finally, he measured the freezing points of each beaker of water, analyzed his results, and formed a conclusion. What type of investigation did Charles perform?

Shelly wants to know if hummingbirds prefer honey, sugar, or corn syrup. She creates three solutions of equal sweetness. One solution is made of honey and water; the second is sugar water, and the third is corn syrup and water. She places three hummingbird feeders side-by-side outside a window. To make sure she could tell them apart, she puts each solution in a different-colored feeder: one is red, one is yellow, and one is blue. Shelly spent a day collecting data by sitting in the chair and recording her observations about _______.

The floor of the Atlantic Ocean is spreading slowly. It spreads at the rate of 1 to 10 centimeters per year. Why would it be useful for scientists to use a model in order to study the spreading of the Atlantic Ocean's floor?

When more than one variable in an experiment is changed at a time, the scientist

Jay wants to know how the amount of acidity in rainwater influences the weathering rate of limestone. To answer his question, Jay performs an experiment in which he soaks identical pieces of limestone in 200 mL of different carbonic acid solutions. The pH of the solutions range from 3.0 to 5.5. After performing his experiment once, he reports his data and draws a conclusion. What can Jay do to improve the reliability and accuracy of his data?

Corey's Science Experiment 1. Purpose: To determine the effect that completely burning a log has on the weight of the log and to calculate the amount of energy transferred in the process. 2. Corey selects a log for the project. 3. He completely burns the log in a controlled environment. 4. He collects all of the ashes and soot which remain after the burning is complete. 5. He weighs all of the remains and calculates the amount of weight and energy transferred in the burning. What is wrong with the steps of Corey's experiment?

In one town, there are several natural gas drilling sites. Scientists warn town officials that the health of the people could be affected by the natural gas wells, so in an effort to protect its citizens, the town temporarily prevents builders from developing homes and businesses within two miles of the drill sites. This example demonstrates how science can be used to inform decision making at the ______ level.

28. Although science strives for objectivity by basing conclusions and explanations on data gathered during scientific investigations, some subjectivity still exists in science, since it is a ________.

What beneficial qualities exist in scientific processes, methods, and knowledge as a result of science being a human endeavor?

Joseph has hypothesized that sound travels in waves. If he were following the scientific method, what should he do next?

Scientific inquiry includes many different activities. Which of the following is a process that is typically performed during a scientific inquiry?

Shakita wants to know if the pH of an open can of soda changes over time. To test this, she designs an experiment that will involve the following steps. 1. Open a can of soda and measure the pH. 2. Allow the open soda can to rest undisturbed on a level countertop at room temperature. 3. Measure the pH of the open soda can every day at the same time for ten consecutive days. What is the outcome variable (dependent variable) in Shakita's experiment?

Rick is a biologist who hypothesized that squid would swim faster in warm water than in cold water. Rick conducted his experiment. He discovered that squid swim at the same rate in warm and cold temperatures. What should Rick do next?

In which of the following ways can scientific knowledge change and grow?

Biological scientists use a variety of methods to gather evidence, or data. If a biologist gathers different species of snakes from a tropical region, what type of investigation did the biologist perform?

Scientific knowledge is based on evidence. Where do scientists acquire evidence?

Mei is studying birds. She studied the beaks of the two birds in the picture. Mei predicted that the bird on the left would eat mainly seeds. Which of the following is the best way to test her prediction?

A bird watcher records the movement of migrating birds. In which part of the scientific process is the bird-watcher participating?

A prediction about a problem that can be tested is ____________________