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ETellez-8th grade science final exam review

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erick tellez

on 8 June 2011

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Transcript of ETellez-8th grade science final exam review

8th grade science final exam study guide Unit 1 Scientific method 1. observation 2. testable question 3. hypothesis 4. test hypothesis 5. analyze data 6. conclusion 7. communication results Lab Saftey 1.Goggles 2.Tie your hair 3.Fire Extingusher Hypothesis Unit 2 3 Types of graphs Testable solution to a testable question Line graph it changes over time Pie graph Measures percentage bar graph it compares many things Independent variable something you can change in a experiment Dependent variable That changes automatically Grams Liters Meter Measures length Measures volume Measure mass Chemical Properties Determines how a substance changes into a completely different substance Physical Properties compound that can change without involving a change in chemical composition Science vs Pseudoscience Science is real science Pseudoscience is fake Unit 3 Metal Most metals are at solid temperature Nonmetal More than half of the nonmetals are gases at room temperature ionic bond between two ions with opposite charges Covalent bond 2 atomic orbitals overlap to form a molecular bonding and anti-bonding orbital Ph scale provides a measure on a scale from 0 to 14 of the acidity or alkalinity Periodic table A table of the chemical elements arranged in order of atomic number, usually in rows 3 States of matter Are made up of microscopic particles Valence electrons valence electrons are the outermost electrons of an atom Metalloids Metalloids are called semiconductors have some properties of metal Parts of a atom the electron, the proton, and the neutron Groups of the periodic table Groups1. alkali metals Group2. alkaline-earth metals Group3-12. Transition metals Group13. boron group Group14. carbon group Group15. nitrogen group Group16. Oxygen group Group17. halogens group Group18. noble gases Acid a compound usually having a sour taste and capable of neutralizing alkalis and reddening blue litmus a compound usually having a sour taste and capable of neutralizing alkalis and reddening blue litmus Ex: lemon - citric acid vinegar - sulfuric acid Base Bases turn red litmus paper blue and have a pH greater than 7 EX: baking soda, milk of magnesia Neutrilization A chemical reaction in which an acid and a base or alkali react to yield a salt and water Unit 4 Rotation The action of rotating around an axis or center Revolution The rotation of the earth refers to the way it spins on its axis. Spring tide When the moon is full or new, the gravitational pull of the moon and sun are combined Neap tide A tide in which the difference between high and low tide is the least Axis An imaginary line around which an object rotates What causes the seasons of earth ? one hemisphere will experience the cold conditions of winter while the other hemisphere experiences the warmer conditions of summer Heliocentric &
Geocentric Heliocentric - is having the sun in the center
Geocentric - Having or representing the earth as the center Unit 5,6,7,and8 What is an equinox? The time or date (twice each year) Hemisphere A half of sphere All phases of the moon It contains 8 phases Asteroid A small rocky body meteor A streak of light in the sky that forms Meteoroid A small piece of metal or stone What are gas giants? A gas giant is a large planet that is not primarily composed of rock or other solid matter. Gas giants may have a rocky or metallic core What are Terrestrial Planets? They are all composed mostly of rock and heavy metals. These planets have a core made of heavy metals that is mostly iron Gravitational Force the force of attraction between all masses in the universe Absolute Magnitude The magnitude (brightness) of a celestial object as it would be seen at a standard distance Apparent Magnitude The magnitude of a celestial object as it is actually measured from the earth Astronomical Unit Astronomical Unit A unit of measurement equal to 149.6 million kilometers Nitrogen cycle The series of processes by which nitrogen and its compounds are interconverted in the environment and in living organisms Water cycle circulates between the earth's oceans, atmosphere, and land, involving precipitation as rain and snow, drainage in streams and rivers Carbon cycle Photosynthesis The process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water What diagram do we use to measure a stars size and color? What are the layers of the Sun and the Characteristics of each? is very, very hot 4 million degrees F middle layer of the sun Photosphere is the visible surface of the Sun Spiral Galaxies in which the stars and gas clouds are concentrated mainly in one or more spiral arms Elliptical Galaxies is a galaxy having an approximately ellipsoidal shape and a smooth, nearly featureless brightness profile Irregular Galaxies is a galaxy that does not have a regular shape, like a spiral or an elliptical galaxy Light year 1 light year = 9.4605284 × 1015 meters Celluar respiration the metabolic processes whereby certain organisms obtain energy from organic molecules Gravity Personal goals for high school and beyond In high school i will try to join the soccer team and be good at it. And i will try not to get in trouble.And my goals for high school is to get good grades i will try to get straight A's. And join some cool clubs at bayshore. And in the future i want to be an engineer and go to college and get a full scholarship in highschool. And in high school i might take some classes that are spanish,and french. And someother cool stuff in high school I really wanted to be an engineer and all that cool stuff i really want to build stuff with robots and all the robots they have.
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