click below
click below
Normal Size Small Size show me how
Dessert
Science Vocabulary
Question | Answer |
---|---|
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. |