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Science Vocabulary

What is the most important safety rule? Listen to your teacher and follow all instructions.
What is the purpose of safety goggles? To protect your eyes.
What does a graduated cylinder do? It accurately measures volume in mL.
What is the purpose of a microscope? To magnify objects.
What measures the length of objects? A ruler(cm)
What measures the mass of objects? triple beam balance
What is an atom? The smallest unit of an element(the building block of all matter)
What is an atomic number? The number of protons in the nucleus of an atom of a given element.
What is a neutron? The neutron has no charge and is located in the nucleus of an atom.
What is an atomic mass The mass of a given atom or molecule. Number of protons plus the number of neutrons.
What is a proton? A positively charged particle located in the nucleus of all atoms.
What is an electron? A negatively charged particle that is located in the electron shell.
What is a valence electron? The number of electrons in the most outer shell.
What is the periodic table? The table of elements arranged in order of increasing atomic number.
What is a Group? A column of elements in the periodic table, in which elements have similar chemical properties and the same number of valence electrons.
What are Periods? A row of elements in the periodic table which have the same number of electron shells.
what is a chemical change? A chemical change is when a new substance is formed with different properties.
What is a physical change? A change in shape or form without changing what it is made of.
What are the five signs of a chemical change? solid precipitate is formed, light is produced, color changes, temperature changes, and gas is produced
What is mass? the amount of matter in an object
What is volume? amount of space an object takes up
What is density? amount of mass in a given object
What is the safe way to smell an object in a lab? to waft
What is displacement? The moving of something from its place or position, used to find the volume of an irregular object
What is a controlled variable? A variable that stays the same the whole time
What is an independent variable? An independant variable is the variable which you change in an experiment.
What is a dependent variable? The dependent variable is the variable that is affected and changed by the independent variable
What is an element? A substance that cannot be broken down
What are compounds? Substances that are made up of more than one element.
What is a molecule? A molecule is formed when two or more atoms chemically combine.
What is a diatomic molecule? A molecule made of only one type of atom
What is a chemical formula? A faster way of showing/writing atoms, molecules, and equations
What is the coefficient? The coefficient tells the number of molecules in a equation, a blank means one
What is the subscript? The subscript tells the number of a certain type of atom in one molecule.
What is a product? A substance that forms as a result of a chemical reaction.
What is a reactant? A substance that exists before a chemical reaction occurs?
What is a chemical reaction? The process that produces a chemical change.
What is a chemical equation? A way of writing a chemical reaction.
What does the Law of Conservation of Mass say? It states that mass is neither created nor destroyed in a chemical reaction.
What is Newton's first law? An object will stay at rest,and an object will stay in motion until acted on by an unbalanced force.
What is inertia? Inertia is the resistance of an object to a change in its state of motion.
What is Newton's second law? Acceleration of an object depends on the mass of the object and the amount of force applied to it.
What is a force? A push or pull
What is Newton's third law? For every action there is an equal and opposite reaction.
What is the HR diagram? A way to categorize stars by different characteristics and attributes.
What a white dwarf star? The dimmest and densest star, a dying star
What is a red giant star? A huge red star that gets very hot and starts to expand?
What is the main sequence? The range from blue to red( brightest and hottest to coolest and dimmest)
What is an elliptical galaxy? A galaxy that contains the oldest stars and very little gas and dust.
What is an irregular galaxy? A galaxy with an undefined shape and young stars.
What is a spiral galaxy? A galaxy in a spiral shape which contains middle age stars with dust and gas.
What is a light year? How far light travels in a year, used to measure great distances.
What is an asteroid? A large rock in space that orbits the sun
What is a comet? A mixture of frozen gases and tiny particles of dust, follows an elliptical path
What is a meteoroid? Solid particles of rock and metal orbiting the sun
What is a meteor? A meteoroid that enters the atmosphere, most meteors burn up in the atmosphere.
What is a meteorite? A meteor that strikes the surface.
What is the Big Bang Theory? A theory on how the world was created, after an explosion the universe began to grow. Then after it was a second old, it was a dense opaque of swirling mass of particles. Next matter began collecting in clumps. Finally the first stars were born.
Created by: m0302667