Praxis Middle School Science 5442 Q&A Exam Bundle

1. A sample contains 8 g 8 gramsof a radioisotope that has a half-life of 10 years. How much time is required for the sample to decay until approximately 1 g one gramof the isotope remains in the sample? 30 years is correct. If the half-life of the substance is 10 years, then every 10 years the amou...

Passive transport movement of materials across the cell membrane without using energy Active transport movement of materials across the cell membrane that requires energy Diffusion movement of materials from an area where they are crowded to where they are not crowded Osmosis the diffusion ...

which of the following characteristics is most important in demonstrating that a hypothesis should be called a theory? it provides an explanation for the results of many experiments which of the following is a function of mitosis in humans? repair of damaged tissue an animation of which of the...

Atomic Structure An atom is a complex arrangement of negatively charged electrons arranged in defined shells about a positively charged nucleus. This nucleus contains most of the atom's mass and is composed of protons and neutrons (except for common hydrogen which has only one proton). All atoms ar...

Fact objective and verifiable Theory accepted knowledge y of relativity Hypothesis educated guess Praxis 5442: what makes a hypothesis? Answered: predictable outcome that can be repeated Law explanation of events model explain on a smaller scale Scientific Method Identify, Forumu...

Cell Basic unit of life Organelle Parts of a cell ("organ" of the cell system) Nucleus a membrane-bound organelle that contains the cell's chromosomes. Pores in the nuclear membrane allow for the passage of molecules in and out of the nucleus. Mitochondria a double-membrane-bound organel...

1. Which of the following characteristics is most important in demonstrating that a hypothesis should be called a theory? a. It interprets an observation. b. It applies to a narrow range of phenomena. c. It summarizes the most recent work of a scientists. d. It provides an explanation for the re...

How many significant figures are in the measurement 0.0120 m? Three A block is accelerating along a flat surface under the action of a force applied parallel to the surface. If the magnitude of the applied force is doubled, then the magnitude of the block's acceleration will Double If a cell ...

Which of the following characteristics is most important in demonstrating that a hypothesis should be called a theory? A.It interprets an observation. B.It applies to a narrow range of phenomena. C.It summarizes the most recent work of a scientist. D.It provides an explanation for the results ...

The process skill of concluding Making a determination based on the results of a controlled experiment A chemistry experiment is performed to determine the effect of a nonvolatile solute on the boiling point of water. Three trials are performed in which 10mg, 20 mg, and 30 mg of salt are added to...

The process skill of concluding Making a determination based on the results of a controlled experiment A chemistry experiment is performed to determine the effect of a nonvolatile solute on the boiling point of water. Three trials are performed in which 10mg, 20 mg, and 30 mg of salt are added to...

Matter Anything that has mass and takes up space. John Dalton Proposed elements were made of atoms; this theory is the Atomic Theory of Matter. Sir Joseph John (J.J.) Thompson Discovered electrons; pictured electrons embedded with protons. Ernest Rutherford Atoms have positive nucleus; elec...