ACT Science 2
Flashcard
•
Science
•
11th - 12th Grade
•
Practice Problem
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the pH range where bromocresol green changes color?
Back
Bromocresol green changes color from yellow to blue between pH 4.0 and pH 5.6.
2.
FLASHCARD QUESTION
Front
What does a blue color indicate when using bromothymol blue as an indicator?
Back
A blue color indicates a basic solution, typically with a pH above 7.6.
3.
FLASHCARD QUESTION
Front
What is the significance of phenolphthalein turning colorless?
Back
Phenolphthalein is colorless in acidic solutions (pH < 8.2) and turns pink in basic solutions (pH > 8.2).
4.
FLASHCARD QUESTION
Front
Define the term 'orbital period' in the context of binary star systems.
Back
The orbital period is the time it takes for one star to complete a full orbit around another star in a binary system.
5.
FLASHCARD QUESTION
Front
What is the relationship between the magnitudes of stars in a binary system and their orbital characteristics?
Back
A greater difference in magnitudes between two stars can lead to a deeper primary minimum in their light curve.
6.
FLASHCARD QUESTION
Front
What is the typical pH of a neutral solution?
Back
The typical pH of a neutral solution is 7.
7.
FLASHCARD QUESTION
Front
What color does phenolphthalein turn in a basic solution?
Back
Phenolphthalein turns pink in a basic solution.
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