Chemical reactions
Presentation
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Science
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7th Grade
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Practice Problem
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Hard
ROBERTO CUELLO
FREE Resource
8 Slides • 10 Questions
1
2
Multiple Choice
Why are chemical reactions essential for life and technology?
Because they create energy and new materials needed for living organisms and modern devices.
Because they only occur in laboratories and have no real-world impact.
Because they are responsible for the destruction of matter.
Because they are only important in cooking.
3
4
Open Ended
Describe the process by which reactants transform into products during a chemical reaction. Why is the breaking and forming of bonds important in this process?
5
6
Multiple Choice
Which of the following is NOT an observable sign of a chemical reaction?
Temperature change
Color change
Gas formation
Change in shape
7
8
Open Ended
Explain why it is important to balance chemical equations and describe the steps involved in the process.
9
10
Multiple Select
Which of the following are types of chemical reactions?
Synthesis
Decomposition
Single Displacement
Evaporation
11
12
Fill in the Blanks
A reaction that absorbs energy from its surroundings and feels cold to the touch is called an
Type answer...
13
14
Multiple Select
Which factors can increase the rate of a chemical reaction?
Increasing temperature
Decreasing concentration
Increasing surface area
Adding a catalyst
15
16
Open Ended
Describe one real-world application of chemical reactions and explain its significance.
17
Open Ended
How do chemical reactions transform matter in everyday life?
18
Multiple Choice
What are the main stages involved in a chemical reaction from start to finish?
Reactants, Bonds Break & Form, Products
Products, Bonds Break & Form, Reactants
Reactants, Products, Bonds Break & Form
Bonds Break & Form, Reactants, Products
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