8th Grade 1st Semester Review

Flashcard
•
Science
•
6th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a food web?
Back
A food web is a complex network of feeding relationships among organisms in an ecosystem, showing how energy and nutrients flow through different species.
2.
FLASHCARD QUESTION
Front
What happens to a food web if a key species is removed?
Back
Removing a key species can disrupt the balance of the food web, leading to population increases or decreases in other species.
3.
FLASHCARD QUESTION
Front
What is the law of conservation of mass?
Back
The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.
4.
FLASHCARD QUESTION
Front
How do you calculate the mass of a product in a chemical reaction?
Back
To find the mass of a product, subtract the mass of the other products from the total mass of the reactants.
5.
FLASHCARD QUESTION
Front
What is acceleration?
Back
Acceleration is the rate of change of velocity of an object, indicating how quickly it speeds up or slows down.
6.
FLASHCARD QUESTION
Front
What are indicators of a chemical reaction?
Back
Indicators of a chemical reaction include the production of light or heat, formation of a gas, and formation of a precipitate.
7.
FLASHCARD QUESTION
Front
What is a precipitate?
Back
A precipitate is a solid that forms and settles out of a liquid mixture during a chemical reaction.
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