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Andrew Exam Thingy
semester exam thing
| Question | Answer |
|---|---|
| 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
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