the nature of matter\n8. which is an example of a chemical change?\na. burning wood\nb. freezing water\nc…

the nature of matter\n8. which is an example of a chemical change?\na. burning wood\nb. freezing water\nc. bending a paper clip\n9. every chemical or physical change in matter includes a change in\na. weight.\nb. mass.\nc. energy.\n10. which of the following is an example of a change of state?\na. pouring chocolate syrup over ice cream\nb. melting ice in a glass of lemonade\nc. stretching copper into a wire\ncompletion\nread each word in the box. in each sentence below, fill in one of the w not all of the words will be used.

the nature of matter\n8. which is an example of a chemical change?\na. burning wood\nb. freezing water\nc. bending a paper clip\n9. every chemical or physical change in matter includes a change in\na. weight.\nb. mass.\nc. energy.\n10. which of the following is an example of a change of state?\na. pouring chocolate syrup over ice cream\nb. melting ice in a glass of lemonade\nc. stretching copper into a wire\ncompletion\nread each word in the box. in each sentence below, fill in one of the w not all of the words will be used.

Answer

Brief Explanations:

  1. Burning wood is a chemical change as it involves a reaction with oxygen to form new substances like carbon - dioxide and ash. Freezing water is a physical change (change of state), and bending a paper clip is a physical deformation without changing the substance's chemical composition.
  2. Every chemical or physical change in matter involves a change in energy. According to the law of conservation of mass and energy, mass and weight don't always change in every such change.
  3. Melting ice is a change of state from solid to liquid. Pouring chocolate syrup over ice - cream is a physical mixture, and stretching copper into a wire is a physical deformation of the metal.

Answer:

  1. a. burning wood
  2. c. energy
  3. b. melting ice in a glass of lemonade