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