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Physical and Chemical Changes Review

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  • Melting ice is an example of what type of change?
    Physical change
  • Burning wood is an example of what type of change?
    Chemical change
  • A change that results in a new substance being formed is called a what?
    Chemical change
  • Which type of property describes how something feels or looks?
    Physical property
  • True or False: Melting chocolate is a physical change.
    True
  • When you dissolve sugar in water, what kind of change is that?
    Physical change
  • A type of chemical reaction that breaks one substance into two new substances
    Decomposition reaction
  • A type of chemical reaction that combines two substances to form a new one
    Synthesis reaction
  • A substance that is added to a chemical reaction and gets used up is called a what?
    Reactant
  • Cutting paper is an example of what type of change?
    Physical change
  • When one chemical change causes other chemical changes to happen, this is called a what?
    Chain reaction
  • When water boils and turns to steam, what type of change occurs?
    Physical change
  • True or False: Physical changes can change the size, shape, or state of matter.
    True
  • When iron reacts with oxygen in the air and makes rust, it has what?
    Oxidized
  • When one chemical change causes other chemical changes to occur, it is called a what?
    Chain reaction
  • A substance added to cause a chemical reaction that gets used up is called a what?
    Reactant
  • Circle all the examples of physical changes: tearing paper, burning wood, melting butter, rusting metal, crushing a can
    Tearing paper, melting butter, crushing a can
  • When iron reacts with oxygen in the air to form rust, this is called what?
    Oxidized
  • Tiny particles that make up all objects and are held together by bonds are called what?
    Molecules
  • A change in size, shape, or state that does NOT make a new substance is called a what?
    Physical change
  • Things that describe how an object reacts with other substances are called what?
    Chemical properties
  • Tiny particles that make up all matter are called what?
    Molecules
  • Which type of change makes something completely new?
    Chemical change
  • True or False: Cutting hair is a physical change.
    True
  • When iron rusts, is that a physical or chemical change?
    Chemical change
  • What happens to the molecules during a chemical change?
    They rearrange to make new substances
  • What happens when ice melts into water? Is it still the same thing?
    Yes, it is still water — only its state of matter changed.
  • A change in which no new substance is made
    Physical change
  • What happens to the molecules during a physical change?
    They stay the same
  • A reaction where one substance breaks apart into two new substances is called what?
    Decomposition reaction
  • True or False: Chemical changes make new substances.
    True
  • Rusting metal is an example of what type of change?
    Chemical change
  • What is a sign that a chemical change may have happened?
    A new color, smell, or gas appears
  • A new substance made after a chemical reaction is called a what?
    Product
  • True or False: A physical change makes a new substance.
    False
  • A reaction where two substances combine to form one new substance is called what?
    Synthesis reaction
  • A substance that is added to cause a chemical reaction is called a what?
    Reagent
  • Things that describe how an object looks or feels are called what?
    Physical properties
  • True or False: Physical changes form new substances.
    False
  • When glass breaks, what type of change occurs?
    Physical change
  • What is something that can start or cause a chemical reaction?
    A reactant or reagent
  • A change in which a new kind of matter is created
    Chemical change
  • Which of these is a physical change? A. Fireworks exploding B. Ice cube melting C. Rust forming
    Ice cube melting
  • When milk sours or spoils, what type of change occurs?
    Chemical change
  • Which type of change can usually be reversed?
    Physical change
  • When butter melts on hot toast, what type of change is that?
    Physical change
  • What is formed after a chemical reaction happens?
    A product
  • The new substance that forms after a chemical reaction is called a what?
    Product
  • Fireworks exploding show what type of change?
    Chemical change
  • A change in which a new substance is created
    Chemical change
  • When something burns, what type of change is that?
    Chemical change
  • A change that changes only size, shape, or state and does NOT make something new is called what?
    Physical change
  • When vinegar and baking soda mix and fizz, what type of change occurs?
    Chemical change
  • Things that describe how an object reacts with other substances are called what?
    Chemical properties
  • A change that results in a new substance being formed is called a what?
    Chemical change
  • A change in which matter changes state but stays the same substance
    Physical change
  • When a candle burns, which part is a chemical change?
    The wax burning and producing gas
  • Things that describe how an object looks and feels are called what?
    Physical properties
  • Freezing water into ice is what kind of change?
    Physical change
  • True or False: Baking bread is a physical change.
    False
  • True or False: Melting chocolate is a physical change.
    True
  • Crushing a can is an example of what type of change?
    Physical change
  • Baking a cake is an example of what type of change?
    Chemical change
  • Tearing paper into smaller pieces is an example of what?
    Physical change
  • When a candle burns, which part is a physical change?
    The wax melting
  • When ice melts into water and then refreezes, what kind of change has occurred?
    Physical change
  • Which type of property describes how something reacts?
    Chemical property
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