What are the main factors causing changes on Earth as mentioned in the introduction?

Chemical Reactions and Their Effects

Interactive Video
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Chemistry
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6th - 8th Grade
•
Hard

Patricia Brown
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sound, vibration, pressure, and density
Gravity, magnetism, friction, and tension
Water, air, soil, and fire
Heat, light, mixing, and electricity
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to a substance when it is heated, according to the section on heat?
It remains unchanged
It evaporates
It expands
It contracts
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is an example of a combination reaction?
Ice melting into water
Salt dissolving in water
Water splitting into hydrogen and oxygen
H2 and O2 forming H2O
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does light affect silver bromide in the context of changes caused by light?
It decomposes it into silver
It turns it into gold
It melts it
It evaporates it
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What role does light play in photosynthesis?
It is absorbed as light energy
It acts as a catalyst
It is not required
It provides heat energy
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens when sulfuric acid is mixed with sugar?
The sugar dissolves completely
A black substance is formed
A white substance is formed
No new substance is formed
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is an example of a mixture where no new substance is formed?
Copper and zinc
Iron and sulfur
Sugar and water
Sulfuric acid and sugar
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