
Practice 8th Grade Science EOG
Quiz
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Science
•
8th Grade
•
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Matthew Knowles
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68 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which is a COMPOUND?
Sodium
Sugar
Nitrogen
Air
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Two different liquids are poured together in an open container. Bubbles begin to form. After the bubbling stops, it is determined that the total weight of the two liquids is less than before they were poured together. Which best describes this observation?
Some of the atoms during the reaction escaped into the air.
Some of the atoms during the reaction were destroyed.
Some of the atoms during the reaction became heavier.
Some of the atoms during the reaction changed to a different kind of atom.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
This is a chemical reaction for the decomposition of carbonic acid into water and carbon dioxide.
H2CO3 → H2O + CO2
How does the reaction support the Law of Conservation of Mass?
Several molecules of water are produced.
The mass of carbon atoms is reduced during the reaction.
The mass of the atoms in the reactant equals the mass of the atoms in the products.
The mass of hydrogen atoms is the only thing that remains the same before and after the reaction.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which best describes a method of obtaining energy that may cause changes in water temperature and harm to fish populations?
Burning Coal
Using ethanol in cars
Installing solar panels on a home
Generating electricity in a hydroelectric power plant
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which is a NONrenewable resource?
Oil
Sunlight
Water
Wood
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
How would a large increase in the salinity of an estuary most likely affect the ecosystem of the estuary?
All organisms would die
All organisms would continue to live as they now do.
The number of salt-tolerant organisms would increase, and the number of salt-intolerant organisms would decrease
The number of salt-intolerant organisms would increase, and the number of salt-tolerant organisms would decrease.
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which would indicate the water in a lake is NOT safe for drinking?
Many varieties of fish in the lake
High dissolved-oxygen levels in the lake
Cold water temperature of the lake
High turbidity levels in the lake
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