Middle School Science Praxis 5442

The American badger, Taxidea taxus, is a mammal with 16 chromosomes in its sex cells. The badger’s body cells must have a total of

32 chromosomes

A teacher asks students to identify the number of neutrons in an atom of 19/9 F, the only stable isotope of fluorine. Which of the following best represents the misconception held by a student who claims that there are 9 neutrons in an atom of 19/9F?

Number of neutrons = atomic number

Fossil A is several layers above fossil B in a series of undisturbed sedimentary layers. Paleontologists use which of the following principles to determine that fossil A is younger than fossil B?

Superposition

During a lesson on electrostatics, a teacher demonstrates two balloons repelling each other. Which of the following claims are possibly true about the charges on each balloon

Both balloons are positively charged OR Both balloons are negatively charged

The structure of a DNA molecule is most similar to which of the following

A twisted ladder

Which of the following instructional goals would an investigation in which students collect data on the color, hardness, luster, and streak of different minerals best address

Identifying minerals based on their different properties

Newtons second law of motion is concerned with which of the following quantities

Force, acceleration, and mass

Which of the following correctly pairs the specialized cell with its primary function in the body

Skeletal muscle cell - Enables movement by contracting and relaxing

Aluminum reacts with oxygen to form a white solid. Which of the following best describes the solid

it is a compound

Petroleum, natural gas and coal are examples of

Fossil fuels

Which of the following documentaries topics will best facilitate a discussion on artificial selection

The history of the five most popular domestic dog breeds in the country

Which of the following properties of light determines the color of an opaque object?

Reflection

An oceanic plate is abducted beneath a continental plate because oceanic plates are

Denser than continental plates are

Students use a pan water and dark colored vegetable oil to model an oceanic oil spill. They have different tools to remove as much oil from their pan of water as possible. The tools represent three common methods that environmental engineers typically use for cleaning up an oil spill: skimming absorbing and dispensing. Which three of the following learning goals are met by this activity?

Students can describe how each method is used to clean up an oil spill, discuss the effectiveness of each method, and organize & analyze data collected from the activity

Which of the following equations represents a combustion reaction?

C3H8 + 5O2 → 3CO2 + 4H2O

A student argues that all genetic mutations are harmful to organisms which two of the following pieces of evidence would best challenge the students argument

A mutation that results in the same protein as the original gene resulting in the same trait

A mutation that increases bone density, making bones resistant to breaks and degeneration