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Chemical Changes
Test Description: Identify evidence of chemical changes through color, gas formation, solid formation, and temperature change.
Instructions: Answer all questions to get your test result.
1) 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
the cake batter changes color.
C
the batter sticks to the pan.
D
steam rises from the warm cake.
2) A teacher mixes two liquids which are the same temperature together in a glass. The temperature rises. The change in temperature indicates
A
a mixture has been produced.
B
a change in state of matter.
C
a chemical change.
D
the densities of the liquids have increased.
3) 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
vegetable peels are added.
D
the compost pile feels warm.
4) Which activity below does not represent a chemical change?
A
melting ice cubes
B
burning logs
C
decaying leaves
D
ripening pears
5) Which observation correctly identifies evidence of a chemical change?
A
ice cube melts
B
magnet attracts a paper clip
C
nail appears smaller when hammered into a board
D
rusty metal hook becomes shiny
6) A student placing an effervescent tablet into a liquid knows a chemical change has occurred if
A
a gas is produced.
B
a mixture is produced.
C
the solid tablet sinks.
D
the solid table dissolves.
7) 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.
8) 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
9) Which of the following is not a chemical change?
A
production of light when a glow stick is used
B
ripening fruits
C
ice melting
D
cleaning a penny with vinegar and salt
10) Which of the following is a chemical change?
A
water boiling
B
formation of rust on the USS Alabama
C
ice melting
D
water freezing
*select an answer for all questions
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