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Mrs. Mack 8th Grade Science A:B: During a physical change During a chemical change A new substance is formed ___________ C:D: In a mixtureIn an element.

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Presentation on theme: "Mrs. Mack 8th Grade Science A:B: During a physical change During a chemical change A new substance is formed ___________ C:D: In a mixtureIn an element."— Presentation transcript:

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2 Mrs. Mack 8th Grade Science

3 A:B: During a physical change During a chemical change A new substance is formed ___________ C:D: In a mixtureIn an element

4 During a chemical change B

5 A:B: Colloidcatalyst A chemical reaction in which energy is absorbed is a(n): C:D: Exothermic reaction Endothermic reaction

6 D

7 A:B: A colloidA substance What is a substance that cannot be broken down into any other substances by chemical or physical means? C:D: A solutionAn element

8 D

9 A:B: chemistryLaw of reactions The fact that matter is not created or destroyed in any physical or chemical change is: C:D: Law of conservation of mass A catalyst

10 Law of conservation of mass C

11 A:B: Sour taste, pH 0-6.9, feels slippery, turns red litmus paper blue Sour taste, pH 7.0, reacts with metals, turns blue litmus paper red What are the properties of an acid? C:D: Bitter taste, pH 0-6.9, reacts with metals, turns red litmus paper blue Sour taste, pH 0-6.9, reacts with metals, turns blue litmus paper red

12 Sour taste, 0-6.9, reacts with metals, turns blue litmus paper red D

13 A:B: evaporationdistillation When left in the open air, liquid solutions can change to gas, leaving solid components behind. What method of separating mixtures is this? C:D: Magnetic attractionfiltration

14 Evaporation A

15 A:B: Distilled wateroxygen Which of the following is not a pure substance? C:D: airCarbon dioxide

16 Air C

17 A:B: Magnetic attractionFiltration Which method of separating mixtures would you Use to separate salt from a saltwater solution? C:D: DistillationEvaporation

18 Filtration B

19 A:B: The chemical reaction created matter The chemical reaction destroyed matter A piece of paper was burned and became a pile of ashes. The mass of the ashes was less than the mass of the paper before it was burned. What can you conclude based on the law of conservation of mass? C:D: The chemical reaction took place in an open system The reaction did not work as expected because it took place in a closed system.

20 The chemical reaction took place in an open system C

21 A:B: Homogeneous mixturePure substance What is a mixture that is so evenly mixed that you can’t differentiate the parts simply by looking at it? C:D: Heterogeneous mixture Pure mixture

22 Homogeneous mixture A

23 A:B: Combustion, oxidation, photosynthesis Combustion, dissolving, cutting Some examples of a chemical change are: C:D: Dissolving, crushing, photosynthesis Oxidation, dissolving, photosynthesis

24 Combustion, oxidation, photosynthesis A

25 A:B: solutionPhysical change Frying an egg is an example of a: C:D: Chemical changeMechanical change

26 Chemical change C

27 A:B: It increases steadilyIt decreases steadily How does the maximum amount of salt that will dissolve in a given amount of water change if the temperature of the water is increased? C:D: It remains the same It increases then decreases

28 It increases steadily A

29 A:B: Physical changeChemical change Blowing into a balloon is an example of a C:D: Mechanical changeElectrical change

30 Physical change A

31 A:B: Surface area and colorTemperature and breakability Factors that can affect chemical reactions include: C:D: Temperature and color Surface area and temperature

32 D

33 Great Job!!!! Great Job!!!! Thank you for playing! Thank you for playing!


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