Unit 7: Chemical Reactions

Unit 7: Chemical Reactions
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21 Video Interactions
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00:01:20
Check all that apply: What are examples of chemical change?
- Cooking an egg
- Food changing into energy
- Burning paper
- Breaking a glass
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00:01:54
Matter is constantly changing but is never created or destroyed.
- True
- False
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00:02:52
Physical Changes occur when all of the following are seen, check all that apply:
- Change in size
- Change in shape
- Change in phase
- Change in chemical composition
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00:05:30
If I change water from its liquid form into its solid form I make a new chemical compound.
- true
- false
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00:05:56
When matter interacts with other matter and changes its form chemical it has undergone what type of change?
- Chemical
- Physical
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00:06:49
Check all that apply, what are different ways that you can tell a chemical change has taken place:
- color change
- heat
- chemical change
- same material just smaller
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00:08:14
Seeing light is also a sign that a chemical change has taken place?
- true
- false
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00:08:16
The formation of bubbles is also evidence that a chemical change has taken place.
- true
- false
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00:08:39
Is the sawing of the wood a chemical or physical change?
- chemical
- physical
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00:08:53
is the light bulb emitting light a chemical or physical change?
- physical change
- chemical change
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00:10:21
Rusting is the addition of what element
- hydrogen
- oxygen
- iron
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00:14:03
1. Ice being broken into small bits is an example of a _____________ change.
- Chemical
- Physical
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00:14:22
2. In a physical change the matter does not change ____________.
- chemical
- its shape
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00:14:36
3. In a chemical change a ________ substance is formed.
- new
- old
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00:14:54
4. A chemical _______________ is a way to describe how matter reacts with other matter.
- reaction
- change
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00:15:14
5. Flammability is the chemical property describing how a substance ____________.
- reacts
- changes with the addition of oxygen
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00:15:31
6. A clue that a chemical change is occurring in a burning flame is that ____________ is given off.
- heat
- light
- heat and light
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00:15:42
7. Chemical changes occur at _________ speeds.
- the same
- different
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00:16:01
8. _______ is the substance produced by iron reacting with oxygen in the air.
- browing
- rusting
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00:16:19
9. A chemical __________ is the chemical change in which one or more substances change.
- change
- reaction
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00:16:35
10. _____________ is a chemical reaction in green plants that produces energy and oxygen.
- decomposition
- photosynthesis
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