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  • Which of these is a mixture? a) Water (H₂O) b) Air c) Salt (NaCl) d) Oxygen (O₂)
    B
  • When matter changes from a solid to liquid or from liquid to gas, what kind of change takes place? a. chemical change b. physical change c. thermal change d. energy change
    Physical change
  • Which of the following is a compound?a) Oxygen (O₂) b) Carbon dioxide (CO₂) c) Iron (Fe) d) Gold (Au)
    B
  • Matter is not created nor destroyed
    the law of conservation of matter
  • what is the chemical formula of glucose?
    C6H12O6
  • Mr. Marcum is a research chemist who is testing a sample to determine its properties. He moved the sample from one container to another. The sample kept the same volume, but its shape changed. From the behavior of the sample, Mr. Marcum kno
    B
  • chemical change
    a chamge that create a new type of matter like burning
  • How many atoms are in Glucose?
    24
  • Chemistry is the study of: a) Stars and planets b) Living organisms c) Matter and its changes d) Weather and climate
  • Name the three types of rocks and how do they form?
    metamorphic rock,sedimentary rock , igneos rock
  • Salt water is made by dissolving salt (NaCl) in water (H₂O). Is salt water a compound, mixture, or element? Explain your answer.
    Mixture , Ni bonds
  • physical change
    the change in the appearance of matter like cutting , folding
  • Evaporation
    liquid changs to gas
  • What atoms are in Glucose?
    C, H , O
  • Choose the words that correctly complete the paragraph. Each word will be used once. atom • compound • element • mixture • molecule The simplest type of substance is a(n)_______________ , and the basic unit of this substance is a
    element, atom, compound, molecule, mixture
  • The center of an atom is called the: a) Shell b) Molecule c) Nucleus d) Proton
    C
  • Sublimation
    liquid changes to gas
  • While Karen was cooking dinner, she noticed that several ingredients went through chemical and physical changes. Which cooking process is an example of a physical change? a. boiling soup b. frying eggs c. baking cookies d. toasting bread
    a
  • CO2 is and example of atoms , molecule oe element?
    molecule
  • Liam knew that all living things have common characteristics. His new baby brother made him think about how different all the types of living things were. Which of the following is not a common characteristic shared by all living things? a.
    D
  • Write the chemical equation of cellular respitation
  • chemical properties
    the way of reaction with another element
  • melting
    ice turns to liquid
  • physical properties
    the apperance of matter
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