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Chapter 10: Waves
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Chapter 10: Waves
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PART 1: What Is a Wave Model? 1. A wave is a pattern that ________________________ over and over again. 2. Waves are used to ________________________ real-world phenomena like sound and water waves. 3. A wave moves through a ________________________, which is the material the wave travels through. PART 2: Parts of a Wave 4. The resting position is the place where the wave would be if it were not moving. 5. The crest is the ________________________ point of a wave. 6. The trough is the ________________________ point of a wave. PART 3: Important Wave Characteristics 7. Frequency is how many times a wave ________________________ in a certain amount of time. 8. Frequency is often measured in ________________________ (waves per second). 9. For sound waves, frequency affects ________________________. 10. Amplitude is the maximum distance the wave moves from the ________________________ position. 11. A wave with a larger amplitude has ________________________ energy. 12. For sound waves, amplitude affects ________________________. 13. Wavelength is the ________________________ between repeating parts of a wave. 14. An example of wavelength is the distance from one ________________________ to the next. PART 4: Mathematical Modeling of Waves 15. Scientists use ________________________ models to connect wave characteristics to physical observations. 16. Frequency corresponds to sound ________________________. 17. Amplitude corresponds to sound ________________________. PART 5: Energy and Waves 18. Waves carry ________________________ energy, which is the energy of motion. 19. The energy of a wave depends on its ________________________ and ________________________. 20. Wave energy is proportional to the ________________________ of the amplitude. 21. If the amplitude doubles, the energy becomes ________________________ times greater. 22. The amount of energy transferred by waves in a given time is proportional to ________________________. 23. If twice as many waves pass in the same time, ________________________ as much energy is transferred. PART 6: Predicting Changes in Waves 24. If the amplitude increases, the energy of the wave will ________________________. 25. If the frequency increases, the amount of energy transferred will ________________________.
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transfer of energy
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Chapter 11: Sound and Light
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🌊 Waves Have Common Properties Even though waves can be different, all waves share four main properties: Amplitude Wavelength Frequency Speed 1. Amplitude Amplitude describes how far the medium moves from the rest position. It is the maximum distance the medium vibrates from rest. Waves with more energy have a greater amplitude. Transverse Waves Amplitude is measured from the rest position to the crest or trough. Longitudinal Waves Amplitude is shown by how compressed or spread out the particles are. Tighter compressions = larger amplitude 👉 Higher amplitude = more energy 2. Wavelength Wavelength is the distance between repeating parts of a wave. Examples Transverse wave: distance from crest to crest Longitudinal wave: distance from compression to compression 👉 Wavelength is measured in meters (m). 3. Frequency Frequency is how many waves pass a point in a certain amount of time. It is measured in hertz (Hz). 1 Hz = 1 wave per second Examples 1 wave per second = 1 Hz 2 waves per second = 2 Hz 👉 Moving the source faster increases frequency. 4. Speed Speed is how fast a wave travels. Speed depends on the medium the wave travels through. Formula for Speed Speed = Distance Time Speed= Time Distance ​ Example Sound travels about 330 m/s in air at normal temperatures. 👉 If the medium and temperature stay the same, wave speed stays the same. 🔗 How Are Frequency, Wavelength, and Speed Related? The three properties are connected by this formula: Speed = Wavelength × Frequency Speed = Wavelength × Frequency If you know two, you can find the third. When speed stays the same: Higher frequency → shorter wavelength Lower frequency → longer wavelength
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Waves & Energy
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Energy Notes
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Biology Exam 3
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Cell Biology Definitions
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Chapter 10: Stress, Health, and Coping Stress vs. Stressor * Stressor: Anything that causes stress (an event, situation, or demand). * Example: Exams, losing a job, relationship problems. * Stress: The body’s response to a stressor. * Example: Feeling anxious, increased heart rate. Types of Stressors 1. Catastrophe * Large, unpredictable events affecting many people. * Example: Natural disasters, wars. 2. Significant Life Changes * Major events that require adjustment. * Example: Divorce, moving, starting college. 3. Daily Stressors * Small everyday problems. * Example: Traffic, homework, arguments. Sympathetic Nervous System & Fight-or-Flight * Activates during stressful situations. * Prepares the body to react. * Causes: * Increased heart rate * Faster breathing * More energy released General Adaptation Syndrome (GAS) A three-stage response to stress: 1. Alarm: Body reacts to stress. 2. Resistance: Body tries to adapt and continue functioning. 3. Exhaustion: Long-term stress drains resources. Type A vs. Type B Personality Type A: * Competitive * Impatient * Time-urgent * More stress-prone Type B: * Relaxed * Patient * Less stressed Immune System & Stress * Long-term stress weakens the immune system. * Makes the body more vulnerable to illness. Locus of Control Internal locus of control: * Belief that you control your outcomes. External locus of control: * Belief that outside forces control outcomes (luck, fate). Managing Stress * Aerobic exercise * Meditation * Relaxation techniques * Spending time with pets * Social support * Healthy sleep habits ⸻ Chapter 11: Social Psychology Fundamental Attribution Error * Tendency to explain others’ behavior by personality instead of situations. * Example: “He’s lazy” instead of considering he may be exhausted. Attitudes * Feelings and beliefs that influence behavior. * Made of: * Thoughts * Feelings * Actions Cognitive Dissonance * Mental discomfort from having conflicting beliefs or behaviors. * Example: Knowing smoking is unhealthy but continuing to smoke. Social Contagion * Spread of behaviors, emotions, or ideas through groups. * Example: Panic spreading through a crowd. Classic Studies Asch’s Line Study * Showed people may conform to a group even when the group is wrong. Milgram’s Obedience Study * Showed people may obey authority figures even when uncomfortable. Social Facilitation vs. Social Loafing Social Facilitation: * Performance improves when others are watching. Social Loafing: * People put in less effort when working in groups. Deindividuation * Losing self-awareness and responsibility in a group. * Example: Crowds acting differently than individuals. Ingoups vs. Outgroups Ingroup: * Group you belong to. Outgroup: * Group you see as different. Can lead to: * Bias * Stereotypes * Prejudice Passionate vs. Companionate Love Passionate Love: * Intense attraction and excitement. Companionate Love: * Deep affection, trust, and commitment. Altruism & Bystander Effect Altruism: * Helping others without expecting a reward. Bystander Effect: * People are less likely to help when others are present. ⸻ Chapter 12: Personality Personality * Patterns of thoughts, feelings, and behaviors that make someone unique. Psychoanalytic Theory (Freud) Id * Wants immediate pleasure. * “I want it now.” Ego * Reality-based decision maker. * Balances id and superego. Superego * Morals and rules. Defense Mechanisms Ways the mind protects itself from anxiety. Examples: * Denial: Refusing to accept reality. * Projection: Blaming feelings on others. * Rationalization: Creating excuses. Humanistic Theory * Focuses on personal growth and reaching full potential. * Carl Rogers developed Person-Centered Therapy. Trait Theory (Big Five) Five major personality traits: OCEAN * Openness * Conscientiousness * Extraversion * Agreeableness * Neuroticism Spotlight Effect vs. Narcissism Spotlight Effect: * Believing others notice you more than they actually do. Narcissism: * Excessive self-focus and feeling superior. Kruger-Dunning Effect * People with low ability may overestimate their skills. Individualistic vs. Collectivistic Cultures Individualistic: * Focus on independence and personal goals. Collectivistic: * Focus on family, groups, and cooperation. ⸻ Chapter 13: Psychological Disorders Psychological Disorder * A pattern of thoughts, feelings, or behaviors that causes distress or problems functioning. Anxiety Disorders * Excessive fear or worry. Examples: * Generalized anxiety disorder * Panic disorder * Phobias OCD * Obsessions (unwanted thoughts) * Compulsions (repetitive behaviors) PTSD * Stress disorder after experiencing or witnessing trauma. Substance Use Disorder * Difficulty controlling substance use despite negative effects. Major Depressive Disorder Symptoms include: * Persistent sadness * Loss of interest * Changes in sleep or energy Bipolar Disorder * Episodes of depression and mania. * Mania involves unusually high energy, mood, or activity. Suicidal Ideation * Thoughts about suicide. (Important: any concerns about safety should be taken seriously and support should be reached out to.) Schizophrenia * Disorder involving: * Hallucinations * Delusions * Disorganized thinking Personality Disorders Antisocial PD * Disregard for others’ rights and social rules. Narcissistic PD * Extreme need for admiration and lack of empathy. Borderline PD * Difficulty with emotions, relationships, and sense of self. ⸻ Chapter 14: Treatment Psychotherapy * Treatment using psychological methods to improve mental health. Types of Psychotherapy Psychoanalysis/Psychodynamic * Focuses on unconscious conflicts and past experiences. Client-Centered/Humanistic * Focuses on acceptance, growth, and self-understanding. Behavioral Therapy * Changes behaviors through learning principles. Cognitive Therapy * Changes unhealthy thought patterns. Cognitive Behavioral Therapy (CBT) * Combines changing thoughts and behaviors. Family Therapy * Works with family relationships. Group Therapy * Therapy with multiple people. Evidence-Based Practice * Treatments supported by scientific research. Therapeutic Lifestyle Change Improving mental health through: * Exercise * Sleep * Nutrition * Social connection Biomedical Treatments Medication * Treats symptoms through biological processes. ECT (Electroconvulsive Therapy) * Uses controlled electrical stimulation to treat severe depression. Psychosurgery * Surgery involving the brain (rare). TMS (Transcranial Magnetic Stimulation) * Uses magnetic stimulation to affect brain activity. ⸻ Quick Test Tips: * Stress = response, Stressor = cause * Asch = conformity * Milgram = obedience * Big Five = OCEAN * Id = pleasure, Ego = reality, Superego = morals * CBT = thoughts + behaviors * Bystander effect = less helping in groups
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