Molecules on the Move
In this state of matter, particles are tightly packed together and only vibrate in fixed positions, keeping a fixed shape.
What is a solid?
This type of change alters a substance's physical properties (like shape or state) but does not produce any new substance.
What is a physical change?
This pure substance contains only one type of atom and cannot be broken down; examples include gold and oxygen.
What is an element?
This technique sorts mixtures with ease by using holes to separate large particles from smaller ones by size.
What is sieving?
These are the starting substances present before a chemical reaction occurs, always written on the left side of a chemical equation.
What are reactants?
This state of matter has no definite shape or volume; its particles are far apart and move quickly in all directions.
What is a gas?
Frying bacon, baking cookies, and rusting a bicycle are all examples of this type of change where new substances are formed.
What is a chemical change?
This is formed when two or more elements are chemically joined together in fixed ratios, represented by formulas like H2O.
What is a compund?
This method uses funnels and filter paper to separate an insoluble solid from a liquid, leaving the solid behind
What is filtration?
This fundamental scientific law states that matter cannot be created or destroyed in a reaction, so total mass stays the same.
What is the Law of conversation of mass?
This theory states that all matter is made of tiny particles which are always moving, even in solids.
What is particle theory?
These are at least three of the main clues/signs that tell you a chemical reaction has occurred.
What are bubbling, colour change, temp change, light produced?
This type of matter contains substances that are physically combined but not chemically bonded, and can be easily separated.
What is a mixture?
This technique involves heating a solution to turn the liquid into gas, leaving the dissolved solid crystals behind in the container.
What is evaporation?
The following chemical reaction is...
H2 + O2 → H2O
What is unbalanced?
This is the term for a solid physically changing into a liquid.
What is melting?
This specific chemical reaction occurs when oxygen in the air reacts with a shiny bright metal overnight to form a reddish coating.
What is rusting?
This is what the chemical formula CO2 tells us about the exact types and numbers of atoms chemically joined in the molecule.
What is 1 carbon and 2 oxygen atoms?
When magnesium ribbon is burned in oxygen to form magnesium oxide, the starting substances (magnesium and oxygen) are referred to by this scientific term.
What are reactants?
The following chemical reaction is...
Fe + S → FeS
What is balanced?
This is the term for a solid changing directly into a gas without melting first, such as dry ice disappearing.
What is sublimation?
This is the type of chemical reaction that makes its surroundings cooler by absorbing/taking in energy, such as in instant cold packs.
What is an endothermic reaction?
This is what the chemical formula H2O tells us about the exact types and numbers of atoms chemically joined in the molecule.
What is 2 hydrogen and 1 oxygen atoms?
Based on your chemical formulas, the symbol ZnO
What is Zinc Oxide?
This is the coefficient that must be placed in front of HCl to balance this equation: Mg + ___ HCl → MgCl2 + H2
What is 2?