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