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CAST High School Practice Questions - California Science Test (CAST) - High School Exam

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About this Exam

Prepare with the CAST High School Practice Questions - California Science Test (CAST) - High School Exam practice quiz. This question bank includes 100 questions covering energy, change, many, design, and population. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

Sample Questions

Question 1
An atom of chlorine-37 has an atomic number of 17. How many neutrons are in its nucleus?
17 neutrons
20 neutrons
37 neutrons
54 neutrons
Question 2
Which change would convert a nitrogen atom into a different element?
Adding one neutron to the nucleus
Changing the number of protons in the nucleus
Exciting an electron to a higher energy level
Removing one electron to form a cation
Question 3
Moving left to right across a period on the periodic table, atomic radius generally decreases. What best explains this trend?
Atoms gain more electron shells, so radius increases
Nuclear charge increases while electrons occupy the same principal shell, pulling the electron cloud closer
Atoms lose protons, so attraction to electrons weakens
Electrons become less tightly held because ionization energy always decreases
Question 4
In the balanced equation 2 H₂ + O₂ → 2 H₂O, how many moles of water form when 3.0 mol of H₂ react completely with excess oxygen?
1.5 mol H₂O
2.0 mol H₂O
3.0 mol H₂O
6.0 mol H₂O
Question 5
A student burns methane and measures a temperature increase in the surroundings. How should the reaction energy change be classified for the chemical system?
Endothermic, because heat flows into the system
Exothermic, because the system releases energy to the surroundings
Neither, because temperature change does not relate to energy
Endothermic, because bonds only break and never form

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Additional Information

CAST High School Practice Questions - California Science Test (CAST) - High School Exam

This practice set contains 100 questions from the matching question bank and focuses on energy, change, many, design, and population. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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Frequently Asked Questions

This quiz contains a total of 100 practice questions carefully selected to test your knowledge on this subject.
Yes, you will have exactly 0 minutes to complete the exam. A countdown timer will be visible once you start.
Yes, you can retake this practice test as many times as you need. The questions and options may be randomized on subsequent attempts to ensure comprehensive learning.

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