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Andrew Exam Thingy

semester exam thing

Study of the composition and structure of materials and the changes that materials undergo best describes the science of: Chemistry
Basic research is: Carried out for the sake of increasing knowledge.
Applied research is: Carried out to solve a problem.
A physical property may be investigated by: Melting ice
Chemical properties: Include changes of state of a substance.
Two features that disinguish matter are: mass and volume.
The particles in a solid are: Packed closely together.
The state of matter in which a material has definate shape and volume is: A solid.
The state of matter that has no definate shape but a definate is: A liquid.
The state of matter that has neither a definate shape or volume is a: Gas.
A nuclear particle that has about the same mass as a proton, but with no electrical charge is called a: Neutron.
The smallest unit of an element that can exist alone or in combination with other particles is an: Atom.
Which of the following forms of radiation has the greatest penetrating power? Gamma.
Which of the following forms of radiation has the least penetrating power? Alpha.
Which has more than gamma, but less than alpha? Beta.
Who called the "atom" an atom? Democritus.
Experiments with cathode rays led to the discovery of the: Electron.
Particles or electromagnetic radiation emitted from the nucleus during radioactive decay: is nuclear radiation.
Which instrument detect radiation by counting electric pulses carried by ionized gas atoms? Geiger-Muller counters.
For electromagnetic radiation, c (the speed of light) equals: Frequency times wavelength.
In SI, the frequency of electromagnetic radiation is measured in: Hertz.
The emission of electrons from metals that have absorbed photons is called the: Photoelectric effect.
Mac Planck proposed that a hot object radiated energy in small, specific amounts called: Quanta
The wave model of light did not explain: The photoelectic effect.
Because excited Hydrogen atoms always prduce the same line-emission spectrum, scientists concluded that hydrogen: Released photons of only certain energies.
For an electron in an atom to change from the ground stateto an excited state: energy must be absorbed
The main energy levels of an atom are indicated by the: Principal Quantum Numbers.
The spin quantum number of an electron can be thought of as describing: The direction of electron spin.
A three-dimensional region around a nucleus where an electron may be found is called: an orbital.
The region outside of the nucleus where an electron may be found is the: Electron cloud.
Quantitive observations are recorded using: Numerical Information.
Qualitive observations are recorded using: Non-numerical Information.
A testable statement used for making predictions and carrying out further experiments is a: Hypothesis.
Standards are chosen because they: are reproducible in another laboritory.
Poor precision in scientific measurement may arise from: Both human error and the limitations of the measuring system.
Five darts strike the center of a target. Whoever threw the darts is: Both accurate and and precise.
To determine density, the quantities that must be measured are: volume and mass.
A change in the force of gravity on an object will affect its: Weight.
The SI base unit for time is the: second.
The SI standard units for length and mass are: meter and kilogram
Created by: andrew.dutton