1647500
Pregunta 1
Pregunta
Why do chemical changes occur?
Respuesta
-
When the atoms and molecules of substances change or react with one another
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When atoms and molecules react chemically against a compound
Pregunta 2
Pregunta
Give three examples of chemical changes
Respuesta
-
Freezing, rusting, melting
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Photosynthesis, rusting, baking
Pregunta 3
Pregunta
True or False: Burning a sugar cube is a chemical change
Respuesta
- True
- False
Pregunta 4
Pregunta
True or False: Chemical Changes happen on a much smaller scale
Respuesta
- True
- False
Pregunta 5
Pregunta
You can cause physical changes with forces like...?
Respuesta
-
Temperature, Force, Motion
-
Force, Motion, Gravity
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Temperature, Gravity, Motion
Pregunta 6
Pregunta
True or False: During a physical change new materials are formed
Respuesta
- True
- False
Pregunta 7
Pregunta
Physical Changes involve....
Respuesta
-
Changes of state, color, appearance, shape, texture, size and form
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Changes of temperature, force and gravity
Pregunta 8
Pregunta
During a chemical change....
Respuesta
-
Chemical bonds are formed between the materials
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No chemical bonds are formed between the materials
Pregunta 9
Pregunta
True or False: Chemical Changes are hard to reverse
Respuesta
- True
- False
Pregunta 10
Pregunta
Is energy released during physical changes?
Respuesta
-
No
-
Yes
-
Only during changes of state
Pregunta 11
Pregunta
How are compounds formed during chemical reactions?
Respuesta
-
When chemical reactions occur, creating the compound and it's components
-
When chemical bonds are formed between the elements
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