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Science FInal
Test May 18, 2017
| Question | Answer |
|---|---|
| A wave will travel only as long as it has to carry. | energy |
| All waves are produced by | vibrations |
| when squeeze spring coils together then release them, you are creating wave | compressional |
| waves that can only travel through a medium are called waves | mechanical |
| a wave that moves back and forth at right angles are called? | transverse |
| when two or more waves overlap and combine to make a new wave | interference |
| Wave strikes an object and bounces off | reflection |
| Bending of wave caused by moving from one medium to another | refraction |
| Angle of incidence of a wave is always equal to the angle of reflection | law of reflection |
| Object causes wave to change direction and bend toward it. | diffraction |
| the different types of electromagnetic waves below from lowest frequency to highest. | radio waves,microwaves,infrared waves,visible light,ultraviolet rays,x rays, gamma rays |
| .Which wave above gives you the warmth you feel from a fire? | infrared waves |
| .Which wave above is absorbed by the ozone layer to protect Earth? | ultraviolet waves |
| Part of the ear that has three bones that amplify a sound wave | middle ear |
| Human perception of sound intensity | loudness |
| Unit that measures loudness | decibiles |
| Sound travels slowest in this medium | gas |
| Part of ear that hoses the organ with tiny hairs on it that signals the brain | inner ear |
| Sound with frequencies too low for human hearing | subsonic |
| Area of sound wave where particles are squeezed together | compression |
| Speed of sound is dependent on | temperature |
| The study of sound is known as | acoutics |
| a hollow chamber that amplifies sound when air inside vibrates. | resonate |
| The use of underwater sound waves to detect objects | sonar |
| 28. Every instrument has a natural ____________________at which it will vibrate. | frequency |
| High frequency sound waves used in medicine, for example during a pregnancy, | ultrasound |
| Sound deliberately set in a pattern is | music |
| Tracing paper | translucent |
| glass window | transparent |
| A dog | opaque |
| A light waves change speed when they pass from one medium to another, the light will be _______. | refracted |
| All of the following would cause a diffuse reflection EXCEPT: | glass |
| Transparent material with a curved surface that _________ light rays. | refracts |
| A lens that is thin in the middle and thick at the edges | concave |
| The inner lining of the eye that converts light into electrical signals | retina |
| two convex lenses to magnify small, close objects. | microscopes |
| lens is used to correct farsighted vision. | convex |
| uses mirrors and lenses to gather more light from far away objects than the eye does. | telescopes |
| When an object changes position, | motion |
| How far an object has moved is | distance |
| Distance and direction of an object’s change in position | displacement |
| Speed at any given point in time | instanteous speed |
| Speed that does not vary is | constant speed |
| When two or more forces act on an object at the same time | net force |
| As an ice skater pushes harder with his leg muscles, he begins to move faster is an example of | newtons 2nd law |
| When you paddle a canoe, the canoe goes forward is an example of | newtons 3rd law |
| The Law of Inertia is another name for | newtons 1st law |
| The equation F = m x a represents | newtons 2nd law |
| Rubber would be a good | insulator |
| Accumulation of excess electric charges on an object | static electricity |
| Protons are ____, electrons are ______, and neutrons are___________________. | positive,negative,neutral |
| Opposite charges _______________ each other. | attract |
| The Law of Conservation of Charge states that electric charges ___________ be transferred from object to object, but ___________ be created or destroyed. | can ,cannot |
| When a current is equal to the voltage difference of a circuit divided by resistance, it is called | ohms law |
| The flow of electric charges through a conductor | electric current |
| The tendency of material to oppose flow of electrons | resistance |
| A push that causes charges to move | voltage difference |
| the closed path through which electrons can flow. | circuit |
| The south pole of a magnet will ______________ the south pole of another magnet. | repel |
| The properties and interactions of magnets are referred | magnetism |
| The magnetic poles of atoms are aligned in a(n) | magnetic domain |
| the region where the magnet is the strongest. | magnetic pole |
| Strength of force between two magnets depends on the _____________between them. | distance |
| a force on objects made of magnetic materials. | magnetic field |
| List the chemical symbols for the following elements: Carbon, Oxygen, Nitrogen,Sodium, Potassium, Magnesium, and Manganese | C,O,N,Na,K,Mg,Mk |
Created by:
Niyah02
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