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What is a process that changes substances into new substances
A chemical reaction OR chemical change
What is an element or compound
CHEMICAL
What is the physical matter of which living or nonliving things are composed?
SUBSTANCE
What do you call a substance that has a pH below 7
ACID
What do you call a substance that has a pH greater than 7?
BASE
What is a solid substances that are formed when 2 liquids are combined in a chemical reaction
PRECIPITATE
What is the process by which the body breaks down food so that it can be used for energy?
DIGESTION
What is substance that increases the rate of a chemical reaction by lowering the amount of energy needed for the reaction to occur, but is not changed by the reaction
CATALYST
What is a process that doesn’t change substances into new substances considered?
PHYSICAL CHANGE
Where are most bioluminescent organisms found?
Most bioluminescent organisms are found in the ocean.
What is a substance that goes into a chemical reaction called?
REACTANT
What is the substance that is formed as the result of a chemical reaction?
PRODUCT
Give 3 examples of a physical change
cutting, tearing, crushing, freezing, melting, or other acceptable answers
What is the essential question for this topic?
How can one explain the structure, properties and interactions of matter?
What is the compound found in some organisms that produces light?
LUCIFERIN
What is Exothermic?
A chemical reaction that gives off heat energy
What are 3 examples of a chemical change?
Burning, baking, cooking, digesting, souring milk , rust formation
Are all changes of state a physical change or a chemical change. Explain your answer
It varies. When a single substance changes state, it is an example of a physical change. (melting, freezing) When a substance changes into a different substance it is a chemical change (formation of a gas or precipitate)
What is Endothermic?
Endothermic is a chemical reaction that absorbs heat energy
What enzyme does oxygenated luciferin interact with to cause a chemical reaction producing light?
LUCIFERASE
How is it determined that a chemical reaction has taken place?
A chemical reaction may be indicated by a change in color, odor, or temperature; the emission of light; and/or the production of a precipitate or gas bubbles
How do scientists represent chemical reactions?
Scientists write chemical equations to represent chemical reactions. In a chemical equation, the reactants are shown on the left side, and an arrow in the middle shows the direction of the reaction, and the products are shown on the right side.
How do substances combine or change (react) to make new substances?
In chemical reactions, chemical bonds are broken, atoms rearrange themselves, and new bonds form
How are chemical reactions written to show that mass is conserved?
Chemical equations are balanced to show that mass is conserved. the total number of atoms of each element is always the same on both sides of the equation. coefficients are used with chemical formulas to balance chemical equations.
What is the law of conservation of mass?
The law of conservation of mass states that matter is neither created nor destroyed in chemical reactions. In any chemical reaction, the total mass of the products always equals the total mass of the reactants.