Search Results

109 questions match your search criteria: change

Select questions to add to a test using the checkbox above each question.

1 2 3 4 ... 11 next page
  • Give an example of chemical change.
    • when fireworks explode, gases form from the solids in the fireworks.
      certain substances change colour when heated
      by adding substances made form barium and chlorine to a barrage-type firework, designers can create a huge sparkling green fan in the sky.
1 2 3 4 ... 11 next page