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Physical/Chemical Changes

Last updated 3 months ago

18 questions

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Question 18

18.

An ice cube melts, then evaporates.

C

P

Hydrogen and oxygen gas combine to form water.

C

P

A beaker of salt water is boiled until only the salt is left behind.

C

P

A piece of paper is torn into several smaller pieces.

C

P

Gasoline combusts in the engine of a car, releasing carbon dioxide and water vapor.

C

P

An egg is boiled until it becomes solid.

C

P

A scoop of sugar is placed in a blender and ground into a fine powder.

C

P

Wood scraps are placed into a chipper, which turns them into sawdust.

C

P

A mixture of red and blue marbles is separated and sorted.

C

P

A plant performs photosynthesis.

C

P

Baking soda is heated, causing it to decompose into calcium and carbon dioxide.

C

P

Milk is left sitting out too long, and it sours.

C

P

A stainless steel pan is heated on the stove.

C

P

A pellet of sodium metal is cut into two pieces with a knife.

C

P

A pellet of sodium metal is placed into water, causing an explosion.

C

P

Sulfuric acid is poured onto a piece of limestone rock, causing bubbling and fizzing.

C

P

A helium balloon is popped.

C

P

Electricity is conducted through a long copper wire.

C

P