Sam is studying the effects of temperature change on a specific enzyme, c at al as e . This enzyme is found in cells and helps break down hydrogen peroxide. As part of her project, she measures the rate at which hydrogen peroxide is broken down by catalase at 20, 25, 30, and 35 degrees C.

Which question BEST describes Sam's science research project?

Hemlock woolly adelgid is an insect pest to hemlock trees. It was introduced in the United States during the 1920's. It is not native to the United States and has few natural predators. To control this insect pest, scientists identified a species of predatory beetle, ( Pseudoscymnus Tsugae). They hope to introduce this beetle to areas where the woolly adelgid is destructive, reduce the woolly adelgid population, and minimize the damage caused to hemlock trees.

Which of these questions BEST summarizes the research described?

Jonathan is learning about water conservation. He learns that the average household in the United States uses 293 gallons of water per day. Jonathan makes a chart that shows the percent of water that each indoor fixture uses in the average U.S. household. He would like to use this chart to determine which indoor fixture uses the most water in his own home. Then, he can replace this fixture with a more efficient, water-saving fixture.

What would be an appropriate research question to guide Jonathan's research project?

Which problem can NOT be answered by experiment?

John and Sven were walking down the street when they noticed a cat being chased by a dog. Eventually, the cat ran up a tree. The dog tried and tried to climb the tree, but was unsuccessful. The dog left and the cat climbed down, safe.

What is the BEST question to help John and Sven answer what just happened scientifically?

Which question would be MOST appropriate to guide a scientific investigation?

Plant growth is dependent on the amount of fertilizer applied. That was the hypothesis Mel and Bill decided on for their science project. They planted identical seeds in the same potting mix, in similar pots. Each pot received the same amount of water and all the pots were placed in the same location in the greenhouse. Mel and Bill’s data was summarized after three weeks.

What would be an appropriate research question to guide this scientific investigation?

In this technological age, today's students are faced with online educational opportunities at both the high school and post-high school level. Many educators wonder how effective such online courses really are. Imagine you are an educator designing an online course. Before beginning, you decide to conduct a study about the effectiveness of online courses. The research question guiding your study is: How do exam scores of online courses compare with exam scores of traditional courses? Your data provides a quantitative comparison of the two types of courses. You determine that test grades are significantly higher when students take online courses.

What question would NOT be appropriate for further quantitative study of the topic of online versus traditional courses?

Mrs. Roberts' class was designing science experiments. Carl and his partner decided to use the outdoor classroom as their laboratory. Since there was a bird feeder in the outdoor classroom, they decided to design an experiment about the feeding habits of birds in their area. The research question that guided their experiment was: Which types of seeds do our feeder birds eat? Carl and his partner determined that the birds preferred sunflower seeds to all other types of seeds. The boys conducted their research during March, April, and May.

What would be the MOST appropriate question for future research on the feeding habits of birds?

While walking home on a dark night, Joanna saw a bright light in the sky and concluded that it must have been a spaceship from another planet.

Which of these questions could Joanna answer using scientific methods of investigation?

Which question cannot be answered with the collected data?

According to the scientific method, how would you test a hypothesis?

Susie places 3 beakers in the freezer. The first beaker contains water only, the second contains water and salt, and the third contains a water and sugar solution. Susie recorded the temperature and the time at which each mixture froze.

Which is the most appropriate hypothesis for her experiment?

Will notices that crickets seem to chirp more frequently at night in June than they do in October. He asks himself, "How do temperature changes affect how often crickets chirp"? If he were to perform an experiment, which of these statements would be the best hypothesis?

Raul and Tyree have open cans of soda. The can A is left sitting on the table while the other cans B and C are each heated on a hot plate. Can B is heated to a much higher temperature than can C. The students then monitored the cans for expansion.

What would be a reasonable hypothesis for this experiment?

If a student notices that frogs are all gathering at one end of the pond the student has done what?

A ______________ is a prediction of an outcome and the basis for experimentation.

Which question can be answered by an experiment?

During chemistry class your teacher challenged you to dissolve four salts as quickly as possible in a specific volume of water. Each group had to pick a variable to test, a variable that would speed up the dissolving process. Each group had to design an experiment using the steps of the scientific method.

The teacher began the experiment with the research question: How can you speed up the dissolution of salt in water. Your group stated: If the water temperature increases, the dissolving time of the four salts will decrease.

Your statement can BEST be described as your group's

The table shows the average population of two competing weeds over a square meter of ground in a Georgia field. The table also gives the average rainfall for five successive years.

If there was an extended drought in this area, what would be a reasonable prediction?

To test acidity levels of water, scientists test pH. As acid rain falls, the pH level of the water in lakes and streams decreases. While certain animals can tolerate low pH levels, others are extremely sensitive to the effects of acid rain and cannot live under these conditions.

Candice is working on a project to determine whether acid rain is causing a decrease in the number of bass and mayflies in a lake in her hometown.

Candice takes a sample of the pH level of the lake, and she finds that the pH level is 5.4. What might Candice predict as a result of her findings?