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science test part 2
studystack for science
| Question | Answer |
|---|---|
| In physics and chemistry how is WORK defined? | A force acting on an object causing it to move |
| How is heat different from temperature? | Heat is a transfer of energy, while temperature measures how hot or cold something is |
| What is the domino effect? | Every phenomenon in which a small change causes a chain of events that leads to a much bigger result |
| what are two examples of potential energy? | GE and EE |
| Is thermal energy a type of potential energy or is it kinetic energy? | Thermal energy is kinetic energy |
| Is sound energy a PE or KE? Does it involve the motion of something or the location of something? | Sound energy is KE, sound waves travel through air to your ear |
| An object's potential energy is related to its ( )? | position |
| Potential energy is associated with a ( ) acting between two objects | force |
| How are temperature and kinetic energy related? | As temperature increases KE also increases |
| What is the molecular difference between a glass of cold water and a glass of hot water? | Molecules in cold water move slower than molecules in hot water |
| What does temperature measure? | How hot or cold something is |
| define medium | A substance that sound can travel through |
| define pitch | The quality that makes it possible to judge sounds as "higher" or “lower” |
| define resonance | The sound out together with a loud sound (this was googled idk if its completely correct) |
| define vacuum | Emptiness of space |
| define vibrating source | When sound waves move through the air vibrating back and forth |
| What is the vibrating source that created the sound wave from your throat? | the vocal cords |
| define sound | Vibrations that travel through the air or another medium that can be heard when they reach a person's or animal's ear |
| Did you? | look at your study guide and make sure you can answer those questions |
| what are the energy conversions in a bouncing ball | GE, KE, EE and it repeats |
| Look over your notes packet | Look at your labs |
| what is the first law of thermodynamics | energy cannot be created or destroyed |
| what 3 things determine how much thermal energy an object has? | Temperature (movement of particles), the amount of matter, The substance it is made of (ex: water, oil, rubber, iron) |
| whats the difference between PE and KE | Potential energy is dependent on an object's position and not its motion. However kinetic energy is dependent on an object's motion and not its position |
| define ultrasound | a type of sound that humans can not hear |
| how does a pistol shrimp use sound as a weapon? | When the shrimp snaps its claws shut, it produces a sharp cracking sound. This sounds stuns the prey so the shrimp can grab it |
| does the sound from the pistol shrimp come from the snap or tiny bubbles? | The cracking sound does not come from the snap of the claw but from Tiny Bubbles as the claw closes rapidly |
| how do doctors use ultrasound? | They use it to look into a fetus in its mothers uterus and can see blood flowing through veins. These ultrasonic wave are reflected from these parts and are detected by a device. |
| how do people use ultrasound? | They use sonar to determine how far or close something is |
| why does a rolling ball eventually come to a stop? | it loses its energy to its surroundings. |
| what happens to a piece of paper when two steel balls collide into it | The thermal energy Burns a hole through the paper |
Created by:
emilybinderiya