24-25 STEM DIAGNOSTIC TEST
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Use the graph below to answer the question. A student drew a graph that shows the motion of a car as it traveled down a street.  When was the car stopped at a stoplight? *
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Mabel read that regular heavy watering promotes growth in sunflower plants.  She planted 6 plots of sunflowers with 5 plants each and watered each plot with a different amount of water.  The tables shows her results. Which of these statements represents Mabel’s revised understanding of sunflower growth? *
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An engineering student is gathering data on the motion of a model car traveling down a ramp.  If energy is conserved, the potential energy of the car at the top of the ramp should equal the kinetic energy of the car at the bottom of the ramp.  After the first trial, the student calculates that the kinetic energy at the bottom of the ramp is less than the potential energy at the top of the ramp. Which of the following can best explain the difference? *
Two students build different electrical circuits using the materials below. Which of the circuits shown will make both light bulbs glow? *
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Several meteorological tools track and record the weather for one day.  The observations are recorded in the table below.  What kind of weather can most correctly be predicted for mid-afternoon? *
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Which claim about cats is based on science? *
Two students are pushing a cart, as shown below.  The cart will move as if it were acted on by a single force with a magnitude of *
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How are scientific theories and laws developed? *
Which of the following is the best evidence that Earth’s continents were once in vastly different positions than they are today? *
Students set up a controlled experiment.  They put 5 crickets in each of the three identical containers.  They set one container to 15 C, one to 20 C, and one to 25 C. Then they count the number of crickets chirps in each container during 1 hour.                                                                                          What is the independent variable in this experiment? *
Which of these best completes this concept map? *
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Points A, B, C and D in the drawing below represent an asteroid's position during its orbit around the sun. Which graph shows how the gravitational force between the sun and the asteroid varies with the asteroid’s distance from the sun? *
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The graphs below give information for waves W and X.  Both waves were produced in the same medium and are moving at the same speed.  Which of the following statements describes another property of these waves? *
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If a scientist gets unexpected results during the first trial of an experiment, what should he or she do next? *
In which situation would osmosis most likely occur in cells? *
Which feature would most likely be forming at converging continental tectonic plate boundaries? *
Automobiles, baseballs, skateboards and bicycles – the world is full of things that are in motion.  Centuries ago the British physicist Sir Isaac Newton stated three laws that describe the ways in which things move.  These are Newton’s three laws of motion. The first law:  Unless acted upon by an outside force, a body at rest tends to stay at rest, and a body in motion tends to stay in motion.  The second law:  Acceleration is equal to the net force acting on a body divided by its mass. The third law:  For every action force there is an equal and opposite reaction force.  Apply this knowledge of Newton's Laws to the following scenario.  A driver starts her car and steps on the gas pedal.  The car gradually accelerates to 50 km/hr.  A few minutes later, the driver suddenly slams on the brakes to avoid hitting a box in the road.  As the car comes to a stop, the driver’s body appears to lunge forward in the seat until it is restrained by the seatbelt.  What law best explains why the driver’s body appears to lurch forward when the brakes are suddenly applied? *
Which statement is a hypothesis? *
The diagram below shows index fossils from different geologic time periods. Based on the diagram, which fossil arrangement is in sequential geologic order? *
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Which two systems primarily function to rid the human body of the wastes resulting from cellular energy production? *
What is the main purpose of a scientific investigation? *
When and where would the number of daylight hours each day be greatest? *
C₃H₈ + O₂  → CO₂   +  H₂O.  This chemical equation represents the combustion of propane.  When correctly balanced, what is the coefficient for water? *
How would a tomato look under blue light? *
In humans, B is the allele from brown eyes and b is the allele for blue eyes.  Two brothers both have brown eyes, but one of them has both the B and b alleles while the other has B alleles.  Which statement is true about the brothers? *
Which factor causes global wind patterns? *
The table below shows the classifications of four animals. According to their classification, which of the following animals are most closely related? *
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Students in a 6th grade classroom made the following observations about an animal.                                                                                                                                                 Which would be the least helpful in determining if this animal is a vertebrate? *
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Which gas is forming in the test tube shown in the picture *
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Steel is a metal that is made from iron and carbon.  During the steel making process, iron and carbon are melted, blended together, and then allowed to harden into a solid.  The iron and carbon do not chemically react with each other.  After steel is made, 20 samples were taken from one piece and tested.  Each sample contained 98% iron and 2% carbon.  Which of the following terms best describes steel? *
Hawaiian happy face spiders from the island of Maui can have different markings, as shown below.  A single gene determines the markings on the spiders. A plain spider is crossed with a patterned spider.  The patterned spider is homozygous.  The pattern allele is dominant to the plain allele.  What percentage of the offspring from this cross are expected to be patterned instead of plain *
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In a pond, the primary producer is green alga, Spirogyra; the primary consumer is the crustacean, Daphnia; the secondary consumer is a small fish, the bluegill; and the tertiary consumer is a larger fish, the smallmouth bass.  What changes can be expected in the pond if the Daphnia are killed with pesticides?
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The graph below shows a population of pigeons living in a neighborhood over a ten-year period. Which of the following statements could account for the change in population seen between years 7 and 8? *
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