Praxis 5442 Practice/Review Test

Which of the following characteristics is most important in demonstrating that a hypothesis should be called a theory?

• It interprets an observation.

• It applies to a narrow range of phenomena.

• It summarizes the most recent work of a scientist.

• It provides an explanation for the results of many experiments.

Which of the following should a student select to correctly represent an isotope of ³⁹₁₉K?

• ³⁹₁₉K+

• ⁴⁰₁₉K

• ³⁹₂₀K

• ⁴⁰₂₀K

Which of the following is a function of mitosis in humans?

• Synthesis of hormones

• Production of gametes

• Repair of damaged tissue

• Transmission of electrical signals

Tags

NGSS.HS-LS1-4

An animation of which of the following is most likely to be included in a lesson about how stars are formed?

• A cloud of gas contracting and heating up

• The formation of black holes

• Meteor showers against a night sky

• The main asteroid belt orbiting the Sun

Tags

NGSS.HS-ESS1-1

To probe whether students have misconceptions about mass and weight, a teacher asks them to consider two identical objects, one on the surface of Earth and one on the surface of the Moon. Which of the following student statements represents a correct understanding about mass and weight?

• Both the weight and mass of the object on Earth are greater than the weight and mass of the object on the Moon.

• There is no difference between the masses and weights of the objects on Earth and the Moon.

• The objects have the same mass, but the object on Earth weighs more than the object on the Moon.

• The weights of the objects are equal, but their masses are different.

Tags

NGSS.MS-PS2-4

Which of the following pieces of equipment would be most useful in a middle school classroom activity with the goal of distinguishing the organisms in a drop of pond water?

• A microscope

• A stopwatch

• A balance

• A centrifuge

Which of the following best explains how igneous rocks are formed?

• Rocks are weathered, transported, deposited, and cemented into new rock.

• Molten material cools and hardens.

• Rocks are changed by shifting magnetic fields.

• Rocks are changed by pressure into different kinds of rocks.

Which of the following best describes how forces produce tides?

• Repulsive electrical forces between dissolved ions cause the ocean to increase in volume.

• Earth's magnetic field exerts an attractive force on the water in the ocean.

• The Coriolis force pushes water in the ocean toward landmasses.

• The Moon exerts a gravitational force on the water in the ocean.

Tags

NGSS.MS-PS2-4

The consequences of which of the following human activities would be the most reasonable basis for a classroom discussion on the eutrophication of a body of water?

• Use of fertilizers in agriculture

• Burning of coal for electricity generation

• Building of levees for flood control

• Extraction of oil from shale

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

NGSS.MS-ESS3-4

Five breeding pairs of guppies are placed in a large classroom aquarium that contains aquatic plants, algae, and small invertebrates. The guppies are the only fish in the aquarium and have plenty of food. Guppies can reproduce very quickly. Which of the following is most likely to happen to the population of guppies in the tank?

• The population size will remain constant as long as the aquarium is maintained, since the guppies have enough food to eat.

• The population size will initially increase rapidly, but eventually the population growth rate will decrease as the guppies' food is consumed faster than it is replaced

• The population size will increase until a mutation results in guppies with different‑colored fins that will outcompete the original fish.

• The population size will steadily decrease until there are no fish in the aquarium, because there is not enough genetic diversity in the small population.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4