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ILS Final Sem 1
| Question | Answer |
|---|---|
| What is the definition of Science | System of knowledge and the methods used to find that knowledge |
| How are science and technology related | Advances in one leads to advances in the other |
| What are the branches of Natural Science | Physical, earth and space, life |
| How do Earth Science and Life Science overlap | Earth science studies systems that includes living things |
| What are the main ideas of Physical Science | Universe is very large and old, forces cause changes in motion, energy can not be destroyed, but it can change form |
| What are the building blocks of matter | atoms |
| What are the steps of the scientific method | making observations-obtaining information through senses, |
| Which step involves information gathered through the senses | observation |
| When a hypothesis is proven incorrect, what must you do | revise hypothesis |
| What is a scientific law | summarizes a pattern in nature |
| What is a model and why are they important | physical or mental representation of an object, visualize very large, small, or extinct objects |
| What is the most important safety rule | follow instructions |
| How do you write a decimal in scientific notation | 0.000032= |
| How do you convert between SI units | conversion factors |
| What is precision | number of decimal points |
| Describe the Kelvin and Celsius scales for temperature | boiling 100C, 273K, conversion add 273 to C=K, K-273=C |
| What are the 3 types of graphs and what do they show | circle-parts of a whole, line, bar |
| What is the difference between a direct proportion and an inverse proportion | direct=both values increase or decrease, Inverse=as one increases the other decreases |
| Which leads to a straight line on a graph | direct- constant relationship between manipulated and responding |
| Why is peer review important | ex: articles, email, conferences-others look over work |
| What is a pure substance | made of one type of molecule, can not be broken down simply |
| What are the symbols for gold and aluminum | Au, Al |
| Why is water a compound | 2 hydrogens for each oxygen |
| What is a mixture | substances together, but not chemically combined |
| What is the difference between homogeneous and heterogeneous mixtures | Homogeneous is the same throughout |
| What are the differences between a colloid, suspension, and a solution | Colloid is cloudy, suspension settles |
| What is malleability | can be pounded into thin sheets, metals |
| What is viscosity | resistance to flow |
| How does filtration separate mixtures | size |
| What is distillation | Used if particles are too small to filter |
| What is the difference between physical and chemical changes | physical- compostion does not change, chemical composition does change |
| What is flammability | Burning requires oxygen |
| What does reactivity mean | Easily combines with other substances |
| What are the signs of a chemical change | Bubbles, color change, precipitate |
| 99% of all matter is in what phase | plasma |
| Define solid, liquid, and gas | solid= Def vol-Def shape, liquid=Def vol- no Def shape, Gas=No Def vol or shape |
| What is pressure | Force distributed over an area |
| How are pressure, temperature, and volume related | increse temp- increase pressure, decrease temp- decrease pressure |
| What is the equation for the combined gas law | (p1)(v1)=(p2)(v2) |
| t1 t2 | |
| How are vaporization and condensation related | vaporazation is the opposite of condensation |
| What happens to temperature during a phase change | Stays constant |
| Name and describe 6 types of phase change | Freezing, melting, boiling, condensing, sublime, deposition |
| What is the difference between and endothermic and exothermic change | endo- heat goes in, exo heat goes out |
| Who named the atom | Democritus |
| Describe the following models of the atom | |
| Democritus | Solid indivisible ball |
| Rutherford | Positive nucleus |
| Dalton | atoms of different elements are different, compounds=ratio of elements are the same |
| Bohr | Electrons in paths around the nucleus like planets |
| What are the charges of the 3 subatomic particles | proton +, electron -., neutron neutral |
| What is the mass of the 3 subatomic particles | P and N= 1 AMU, E=1/2000 AMU |
| What is used to identify an element | Atomic number |
| What is the atomic number | Number of protons |
| What is an isotope | Atoms of the same element with different number of neutrons |
| Describe the electron cloud model | Electrons can be anywhere within an energy level, spend more time in dense areas |
| What is the difference between ground state and excited state electrons | Ground state has less energy |
Created by:
evroman
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