Review

Review • Get out ½ of a sheet of paper for everyone at your table • Each person will write down their answers to the questions on their paper • At the end, you will trade papers with a neighbor and grade the answers • Then, you will calculate the average score for your table • The table with the highest average score wins Panther Points!! • BE HONEST! Dishonesty will result in signing the Conduct Book

Question 1 • A tennis ball could be used to represent the Sun because it is round and yellow. Which of these other things could also be a good model for the Sun? • A. a light bulb • B. a Kleenex box • C. an empty cup • D. an eraser

Question 2 • A student chooses to use a straw as a model for a plant stem. What is one advantage to using the straw as a model? • A. It is made from the same materials as a plant stem. • B. It has an opening that is on the same scale as in a plant stem. • C. It can carry water like a plant stem. • D. It is the same size as all plant stems.

Question 3 • George is interested in insects and wants to do an experiment. Which of the following is a scientific question about insects that he could investigate with an experiment? • A. Do ants feel anxiety? • B. Do different food types affect the growth rate of beetles? • C. Are ladybugs prettier than beetles? • D. Why are there so many different kinds of insects in the world?

Question 4 • When performing scientific investigations, scientists often use different approaches. For example, one scientist might add an extra step to his or her investigation that another scientist's investigation does not need. In other cases, certain steps might be repeated or arranged in a different order. • Even with all the different ways scientists can approach a problem, there are some basic steps that usually occur in the same order. For a single scientific investigation, which of the following shows steps in the most appropriate order? • A. gather experimental data draw conclusions question hypothesis • B. hypothesis draw conclusions question gather experimental data • C. draw conclusions question hypothesis gather experimental data • D. question hypothesis gather experimental data draw conclusions

Question 5 • Peter wants to figure out which insects have 4 legs, 6 legs, and 8 legs. He decides to do this by • A. collecting several types of insects and counting the number of legs. • B. trying to remember how many legs each type of insect has. • C. performing experiments on several types of insect legs. • D. making a model of an insect and counting the number of legs.

Question 6 • For the past four years, Mr. Thompson has kept a pet boa constrictor in his science classroom. At the beginning of each year, his students measure the length of the snake and record the result. • The table below shows the measurements for all four years. Year Length (cm) • 1 120 • 2 190 • 3 260 • 4 330 • What is the growth pattern of the boa constrictor? • A. It grows 70 centimeters each year. • B. The amount it grows changes every year. • C. It doubles in size every year. • D. It grows 7 centimeters each year.

Question 7 • Yasmeenjust finished a science experiment in which she explored the properties of corn starch, distilled water, oil, and acid. Which of these materials can Yasmeen dispose of by pouring into the sink? • A. corn starch • B. distilled water • C. acid • D. oil

Question 8 • In Randy's science class, each lab group must identify an unknown compound in a test tube. One of the characteristics that the students will observe to help identify the compound is odor. Which of the following describes the appropriate way to detect the odor of the substance in the test tube? • A. Inhale directly above the opening of the test tube. • B. Pour some of the unknown on a paper towel and sniff the paper towel. • C. Wave your hands over the test tube to direct some of the odor toward your nose. • D. Pour some of the unknown into a dish and inhale directly from the dish.

Question 9 • While washing a glass beaker, Sophia accidentally dropped the beaker in the sink. A piece of the broken glass cuts Sophia's finger. What can Sophia do to help stop the bleeding until her teacher arrives? • A. Nothing, let the blood coagulate and stop itself. • B. Press a clean towel or cloth firmly against the cut. • C. Lie down and raise her arm straight up. • D. Wash the cut with any liquid that is nearby.

Question 10 • Barbara completed an assignment for extra credit in science class. She used a pH meter to find the pH of different substances. • After she finished measuring the pHs, she created a diagram that showed the substances arranged in order from the most acidic to the most basic. • If Barbara added stomach acid—pH 1.3—to her investigation, where should it appear in her diagram? • A. between milk and water • B. to the left of cola • C. between water and blood • D. between soap and bleach

Question 11 • A group of scientists suspects that a certain well-accepted theory is not accurate. They decide to perform several experiments to test the theory with new research techniques. The experiments support the scientists' idea that the theory is incorrect. • After sharing these results with the scientific community, other scientists perform experiments to test the established theory. All of the new data are combined, and it is determined that the theory is most likely incorrect. • By questioning the accuracy of the established theory, the work of the original group of scientists • A. was automatically accepted by the public. • B. broke a fundamental rule of experimental procedures. • C. led the scientific community to new understanding. • D. was found to be unimportant by other scientists.

Question 12 • A scientist is skeptical of a widely accepted theory. He decides to perform an experiment to test the theory. The experiment's results support the current theory. • Was the scientist's experiment useful? • A. No. It had no effect on the scientific theory. • B. Yes. It disproved the current theory. • C. Yes. It provided more support for the theory. • D. No. It provided no new information.

Question 13 • Before Daniel performed his experiment, he hypothesized, "If I raise the temperature of a cup of water, then it will be able to dissolve more sugar." • Which of the following results would support the hypothesis? • A. The cup with the warmest water dissolved the largest amount of sugar. • B. The cup with the coolest water dissolved the largest amount of sugar. • C. None of these statements support the hypothesis. • D. The cup with the warmest water dissolved the least amount of sugar.

Question 14 • Students in Mr. Painter's science class studied samples of pond water using a microscope. To prepare for the experiment, the students placed a drop of pond water on each microscope slide, and then covered the drop with a cover slip that was marked with a 1 mm grid. • Using the microscope to view the slides, students counted how many of each type of organism they found in each 1 mm square. Finally, each student calculated the total number of each type of organisms. Their data is shown below. • Which organism is the least plentiful in the pond water studied? • A. volvox • B. amoeba • C. paramecium • D. euglena

Question 15 • Jeremy hypothesized that adults with blue eyes are shorter than adults with brown eyes. He collected data by visiting all of the teachers in his school and found that his hypothesis was false. Should Jeremy consider his hypothesis useful? • A. No; a false hypothesis makes a scientist look silly. • B. Yes; now he knows that the exact opposite of his hypothesis must be true. • C. Yes; a false hypothesis gives a scientist new information to use. • D. No; false hypotheses are a waste of time.

Trade • Trade papers with a neighbor • Grade their answers HONESTLY

Question 1 • A tennis ball could be used to represent the Sun because it is round and yellow. Which of these other things could also be a good model for the Sun? • A. a light bulb • B. a Kleenex box • C. an empty cup • D. an eraser

Question 2 • A student chooses to use a straw as a model for a plant stem. What is one advantage to using the straw as a model? • A. It is made from the same materials as a plant stem. • B. It has an opening that is on the same scale as in a plant stem. • C. It can carry water like a plant stem. • D. It is the same size as all plant stems.

Question 3 • George is interested in insects and wants to do an experiment. Which of the following is a scientific question about insects that he could investigate with an experiment? • A. Do ants feel anxiety? • B. Do different food types affect the growth rate of beetles? • C. Are ladybugs prettier than beetles? • D. Why are there so many different kinds of insects in the world?

Question 4 • When performing scientific investigations, scientists often use different approaches. For example, one scientist might add an extra step to his or her investigation that another scientist's investigation does not need. In other cases, certain steps might be repeated or arranged in a different order. • Even with all the different ways scientists can approach a problem, there are some basic steps that usually occur in the same order. For a single scientific investigation, which of the following shows steps in the most appropriate order? • A. gather experimental data, draw conclusions, question, hypothesis • B. hypothesis, draw conclusions, question, gather experimental data • C. draw conclusions, question, hypothesis, gather experimental data • D. question, hypothesis, gather experimental data, draw conclusions