Chemical Changes Question Preview (ID: 5173)
Identify Evidence Of Chemical Changes Through Color, Gas Formation, Solid Formation, And Temperature Change.
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A student places a pan containing liquid cake batter into a hot oven. The student observes a chemical reaction when
a) the batter sticks to the pan.
b) steam rises from the warm cake.
c) the cake batter changes color.
d) the batter sticks to the pan.
A teacher mixes two liquids which are the same temperature together in a glass. The temperature rises. The change in temperature indicates
a) a chemical change.
b) a change in state of matter.
c) a mixture has been produced.
d) the densities of the liquids have increased.
When observing a compost pile, one can tell that the materials have undergon a chemical change when
a) vegetable peels are added.
b) water is added.
c) the compost pile feels warm.
d) vegetable peels are added.
Which activity below does not represent a chemical change?
a) burning logs
b) ripening pears
c) melting ice cubes
d) decaying leaves
Which observation correctly identifies evidence of a chemical change?
a) rusty metal hook becomes shiny
b) ice cube melts
c) magnet attracts a paper clip
d) nail appears smaller when hammered into a board
A student placing an effervescent tablet into a liquid knows a chemical change has occurred if
a) the solid table dissolves.
b) a mixture is produced.
c) the solid tablet sinks.
d) a gas is produced.
Students add baking soda to a mixture. Which observation is evidence of a chemical change?
a) The materials were mixed with a spoon.
b) The ice melted.
c) The water turned orange.
d) The materials produced bubbles.
Which of the following is not a sign of a chemical change?
a) a change in state
b) formation of heat and light
c) formation of a gas
d) a change in color
Which of the following is not a chemical change?
a) ice melting
b) ripening fruits
c) cleaning a penny with vinegar and salt
d) production of light when a glow stick is used
Which of the following is a chemical change?
a) formation of rust on the USS Alabama
b) water freezing
c) ice melting
d) water boiling
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