Grade 6 Exam Review 25-26 BL t

Three students perform an experiment. Each student analyzes their data and reports results. If the students find that the results of their experiment are replicable, which statement would you expect to be true?

• The students’ results will be similar.

• The students’ results will be different.

• The students’ results will all be exactly the same.

• The students’ results will be based on multiple trials.

Tags

NGSS.MS-PS2-5

Which statement best describes the use of scientific replication?

• A. A scientist performs several different experiments and compares the results obtained.

• B. Multiple scientists independently perform the same experiment and compare their results.

• C. A scientist conducts multiple trials of the same experiment and compares the results obtained.

• D. Multiple scientists observe another scientist’s work, and they compare their notes on the results obtained.

Noah wants to investigate the percentage of hurricanes that make landfall in the United States. He also wants to know their names, when they made landfall, and the damage they caused. Which type of scientific investigation should Noah perform?

• Watch the Weather Channel’s live report of a hurricane making landfall.

• Obtain and analyze historical data from the National Weather Service website.

• Perform a controlled experiment on the variables that affect hurricane strengthening.

• Interview a local meteorologist about hurricanes that have made landfall in the United States.

Tags

NGSS.MS-ESS3-2

Scientists perform different types of scientific investigations. Which of the following is an example of a scientific experiment?

• placing several different types of rocks in various types of acids and observing what changes take place in each type of rock

• placing a rock in an acid such as lemon juice, developing a procedure for observing it, and carefully recording your findings over a period of time

• placing a rock in an acid such as lemon juice and inferring, after a few days of careful observation, that rocks weather faster in an acid than they do in water

• using three samples of the same kind of rock, place one rock in lemon juice, one in vinegar, and one in orange juice to observe how different types of acids affect the speed of weathering

Tags

NGSS.MS-PS1-2

Mrs. Field’s class is incubating chicken eggs. For optimal development, the incubator must remain between 37 °C and 39 °C. Before leaving school each day, Jack, Ollie, and Tallulah independently record the temperature of the incubator at 4:00 PM. Their temperature measurements are recorded in the table. Which is the most likely reason for the differences in Jack, Ollie, and Tallulah’s temperature measurements?

• the ability of the students to accurately read the thermometer

• the time of day the students recorded the temperature inside the incubator

• the number of eggs inside the incubator at the time the temperature was recorded

• the number of lightbulbs illuminated in the incubator at the time the temperature was recorded

Kayden and Abigail test how the steepness of a ramp affects the time it takes a marble to reach the finish line marked “X” on the floor. They obtain identical marbles, books, and ramps from their teacher to perform the experiment. They prop the ramp on 1, 2, and 3 books to alter the steepness of the ramp. Both Kayden and Abigail find that the marble reaches the finish line faster when on the steepest ramp, however, Abigail’s marble reaches the finish line 0.8 seconds faster than Kayden’s. What might account for this difference?

• The type of marble they used

• The type of floor surface they used

• The number of trials they performed

• The steepness of the ramp that they used

Tags

NGSS.MS-PS2-2

Scientific explanations must be formed and supported by empirical evidence. Which of the following is NOT an example of empirical evidence?

• a prediction

• an observation

• numerical data

• measurable results

Tags

NGSS.MS-LS2-4

NGSS.MS-ESS3-4

Scientists use empirical evidence to determine the age of objects, such as this fossilized tree trunk. Which of the following is NOT an example of empirical evidence?

• A. A scientist reads a journal article about the fossilized tree trunk.

• B. A scientist uses the law of superposition to determine the relative age of the fossilized tree trunk.

• C. A scientist counts the number of tree rings to determine the approximate age of the fossilized tree trunk.

• D. A scientist compares the ratio of carbon-12 to carbon-14 to determine the absolute age of the fossilized tree trunk.

Initially, the theory of plate tectonics was rejected by most scientists. Now, the theory of plate tectonics is widely accepted. Which of the following most influenced how scientists think about plate tectonics?

• The speed and motion of tectonic plates has increased.

• More geologists have studied plate tectonics than in the past.

• Scientists have mapped the location of tectonic plate boundaries.

• New evidence was discovered that made scientists revise their thinking.

Tags

NGSS.MS-ESS2-3

Many items are used as models in science such as maps, diagrams, and even computer simulations. Which of the following accurately describes the purpose of models in science?

• Models are created to study items that no one wants to study in person.

• Models are used to study things that are usually much easier to observe directly in real life.

• Models are used to study things that are too big, too small, too distant, or too complex to study directly.

• Models are created as a fun thing for scientists to create while they are waiting on results from an experiment.

Tags

NGSS.MS-ESS2-1

NGSS.MS-ETS1-4

NGSS.MS-LS2-3

NGSS.MS-ESS1-1