Physical & Chemical Changes
Quiz by Alexandra
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25 questions
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- Q1What is a physical change?A change in size, shape and identity.A change in size only.A change in shape only.A change in size and shape.30s
- Q2What is a chemical change?A change in size, shape, and identity.A change in shapeA change in sizeA change in size and shape.30s
- Q3What is chemistry?The study of "mixing matter" and how matter can change identity.The study of cheddar mistThe study of chemicals30s
- Q4What is a chemical bond?The force that keeps atoms separated in a compound. They are the source of energy when the bonds are reattached.The force that holds atoms together in a compound. They are the source of energy when the bonds are broken and formed.A hug between chemicals.Attachments (like belts) that keep atoms in a group.30s
- Q5What is a chemical Reaction?The process by which one or more substances change to produce more of the same substances.The process by which one substance changes to produce fewer substances.A process during which chemical bonds between atoms are broken and new ones are formed. Producing one or more different substances.30s
- Q6Exergonic reactionChemical reactions that release energy.Chemical reactions that absorb energy.Chemical reactions that have no energy.30s
- Q7What is an exothermic reaction?A chemical reaction that has no thermal energy (heat).A chemical reaction that releases thermal energy (heat).A chemical reaction that absorbs thermal energy (heat).30s
- Q8What is an endothermic reaction?A reaction that has no energy in the form of heat.A reaction that releases energy in the form of heat.A reaction that ABSORBS energy in the form of heat.30s
- Q9What is a catalyst?A substance that slows down the rate of a chemical reaction.A substance that stops a chemical reaction.A substance that speeds up the rate of a chemical reaction.30s
- Q10Law of Conservation of MassMatter is not created nor destroyed in any chemical or physical change, but just converted into a different form of matter.Matter must be conservedMatter can be created and destroyed in any chemical or physical change.30s
- Q11What is a reactant?A chemical substance that is present at the start and end of a chemical reaction.A chemical substance that is present at the start of a chemical reaction; a starting ingredient in a chemical reaction.A chemical substance that is not present at the start of a chemical reaction.30s
- Q12What is a product?A chemical substance that is an ingredient in a chemical reaction.A chemical substance formed as a result of a chemical reaction; reactants produce productsA chemical substance not formed as a result of a chemical reaction, but from a physical change30s
- Q13Who was Antoine Lavoisier?Ms. McCourt's ex-boyfriendHe was 'father of modern chemistry', named oxygen and hydrogen, and created the Law of Conservation of MassA really cool German astronomerMr. Smith's father30s
- Q14The mass of the candles and oxygen before burning is...always equal to the mass of the remaining candle and gaseous productsalways different from the mass of the remaining candle and gaseous productsalways less than the mass of the remaining candle and gaseous productsalways more than the mass of the remaining candle and gaseous products30s
- Q15What is a subscript?A number in a chemical formula that tells the number of atoms in a molecule or the ratio of elements in a compoundA substitute teacher's signatureWriting under the lineA number in a chemical formula that tells the number of molecules in a compound30s