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Julie has the following objects:
Which question could Julie answer most easily by conducting a scientific investigation?
In which activity would using the Internet be most helpful?
Which statement is an explanation rather than a description?
Use this data table to answer the question.
A scientist examined the numbers of two different species of insects on four different kinds of trees in the same forest. The results of her examination are shown
on the data table.
What inference can the scientist make about the insects?
Use the table below to answer question 5.
Jenny compared the average temperature and annual rainfall for two towns in the same state. The results are shown in the data table. From these results, Jenny concluded that hotter weather causes more rain to fall. What is another reasonable interpretation of this data?
Use this data table to answer question 6.
Chris wanted to determine the effects of a soil pollutant on the growth of a sunflower plant. He designed an experiment and recorded his results in the data table. Where does Chris make a mistake in the design of his experiment?
Damon measured the height of a plant three times with a metric ruler. He recorded the measurements in the data table above.
Which statement most likely explains the variation in Damon’s data?
Use this graph to answer question 8.
A scientist studied 160 bird nests and counted the number of eggs in each nest. Her results are shown in the bar graph above.
Which statement best describes the scientist’s results?
A scientist makes an important discovery while conducting an experiment. What should the scientist do next?
A scientist performed an experiment that had an unexpected result. Before telling anyone about the result, the scientist performed the experiment again. What is the most likely reason the scientist performed the experiment more than once?
Jeanette is studying a substance. Which property of the substance is chemical?
Use this element from the periodic table to answer the question.
What is the atomic mass for silicon?
A scientist has two samples of the same chemical: one sample is a solid block, and the other sample is a powder. The scientist puts the solid block in a beaker of water and observes a reaction. What would most likely happen if the scientist placed the powdered sample into a different beaker of water?
A scientist is trying to track the movement of a rocket. What information does the scientist need to determine the velocity of the rocket?
Mrs. Wilson’s science class is graphing the movement of vehicles passing their school. Which line graph shows a vehicle slowing down?
Jenny threw a paper airplane toward the west. The wind, however, caused the airplane to move in a southwestern direction.
Which statement best describes the direction of the wind?
Noah carried a skateboard up a hill and then rode the skateboard down the hill. When Noah reached the bottom of the hill, he rolled to a stop. When did Noah have the most potential energy?
What happens to green light and red light when they shine on a green leaf?
The two waves above are traveling at the same speed. Which statement best describes the difference between the waves?
What would be the best use for a material that reflects almost all light?
Laura sees a red flower. Which statement best describes why the flower is red?
Dee adds five grams of a chemical to one liter of liquid and observes a reaction. If the reaction is endothermic, what will happen?
Some electricity is made by damming rivers and using the water to push a turbine. What is a potential negative effect of this form of energy?
After harvesting, a farmer plowed the remaining vegetation into the soil. What is the most likely reason the farmer did this?
What is the best ecological reason for using recycled paper?
Rachel wrote a letter about helping her father cook dinner. Read Rachel’s letter. Then answer the questions that follow.
Today Mr. and Ms. Rice came over for dinner, and Dad asked me to help cook. We made cornbread, baked chicken, broccoli, and a fruit salad. I helped with all of it except the fruit salad, which Dad made. The first thing we worked on was the chicken, because Dad said it would take over an hour to bake. First I turned our electric oven on to 325°F. I took the plastic off the whole chicken, washed it, rubbed it inside and out with oil, salt, and seasonings, and put it in a pan. We put an extra piece of chicken in a separate pan to make sure we had enough. Then Dad told me to check the temperature of the chicken by inserting a thermometer into the breast or thigh. He said when the inside temperature of the chicken was 165°F, it would be done. I figured that if the oven temperature was 325°F, it should not take very long at all for the chicken to reach 165°F. Dad said we should check the temperature of the whole chicken and the extra piece every 15 minutes. Since we have been studying graphing in math class, I decided to make a graph of the temperatures. Here is my graph:
I was very surprised that it took so long for the chicken to get up to 165°F, even though Dad had told me it would.
While the chicken was baking, I mixed up the cornbread batter and put it in the oven as well. Then I chopped the broccoli and put it in a glass casserole dish on a plate in the microwave. When the broccoli was done, I took it out and added butter and salt. I thought about the difference between the microwave oven and the regular oven. The pan I cooked the chicken in was very hot, and I had to use hot pads to touch it. But even though the broccoli was cooked and steaming, the handles of the broccoli dish and the plate under it were not hot at all. Dad told me that microwave ovens and regular ovens use different scientific principles to cook food.
Right before Mr. and Ms. Rice arrived, Dad found a jar of juice in the cupboard, and I poured glasses for everyone and added ice to cool it down. When our company came, everything was ready, which was good, because I was starving! The meal was fabulous, and I was very proud I had provided such significant assistance to Dad.
I can’t wait to cook dinner for you next time you come visit, Grandma. I hope you are doing well.
Which flowchart best summarizes heat transfer to the cooking chicken?
The microwave oven heats the broccoli, but not the dish handles or the plate underneath. Which statement best explains why this happens?
Which conclusion is best supported by the data Rachel gathered while baking the chicken?
Rachel wonders how the number of ice cubes added to a glass of juice affects the temperature of the juice. She wants to design an investigation that tests this question and that will produce clear, repeatable results.
Which data table shows the best experimental design?