Physics Chapter 2: Key words to understand

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Physics Chapter 2: Key words to understand

There are lots of new key terms that you need to make sure you understand in preparation for your exam. It’s really important that you recognise what each of the words mean and are able to use them correctly in a sentence. This will help you to explain ideas scientifically and ensure you pick up important marks in your exam.

Some tips for learning science vocabulary.

Tip 1 -Play some games with the keywords

You could play hangman with your friends or family using the words you need to learn. Make sure you explain what the word means when they have guessed it.

You could play Pictionary for some of the energy types or renewable energy sources. Ask someone to draw you a picture for one of these terms and see if you can guess which one they are drawing.

You could make a puzzle such as a crossword or a key word wordsearch http://www.armoredpenguin.com/crossword/

Tip 2 – Use flash cards

Write out the key word and the definition on separate cards, mix them up and see if you can match the keyword with the correct description.

Write the keyword on one side and the definition on the other. Look at the keyword side and see if you can remember the definition or read the definition and try to remember the keyword. Turn the card over to check, or ask someone else to read them out to you.

See if you can sort the keywords into groups of similar words. For example, you could group together all the words that give a different type of energy. Try to explain why you have grouped them together to a friend or family member.

Tip 3 – Spelling strategies

Use the spelling strategies that you talk about in tutor time to help with any words that you find difficult to spell.

Break it into sounds

Break it into syllables

Break it into word parts

Use a mnemonic

Refer to word in the same family

Say it as it sounds

Words within words

Make connections between words

Think about the meaning of words

Apply spelling rules

Learn by sight

(d-i-a-r-y)

(re-mem-ber, con-tin-ent)

(dis+satisfy)

(necessary—one collar, two sleeves, rhythm has your two hips moving)

(muscle—muscular)

(Wed-nes-day)

(Parliament—I AM parliament, GUM in argument)

(bright, light, night, etc)

(bi+cycle = two+wheels)

(writing, written)

(look—cover—write—check)

Lesson 1:- Waves

Amplitude

Compression

Crest/Peak

Energy

Frequency

Incident wave

Longitudinal

Oscillation

Rarefaction

Reflected wave

Reflection

Superpose

Transverse

Undulation

Vibrations

Wavelength

The distance between the middle to the top or bottom of a wave.

Where parts of a wave are squashed together.

The top of a wave.

Something that is transferred by a wave.

The number of waves which go past a particular point per second.

The wave hitting a barrier or surface.

A wave where the oscillations are in the same direction as the wave.

Movement back and forth in a regular rhythm

Spreading or directing away from a point.

The wave bouncing off a barrier or surface.

When a wave hits and bounces off of a surface.

When waves are put together and either add up or cancel out.

A wave where the oscillations are at 90 o to the direction of the wave

A wave on the surface of water.

Rapid movement back and forth.

The distance from one part of a wave to the same point on the next wave.

Lesson 2:- Sound

Medium

Molecules

Speed of light

Speed of sound

A material for sound to travel through, either a solid, liquid or gas.

Small particles which make up substances

The speed a light wave travels is 300,000,000 m/s, almost a million times faster than sound.

The speed at which a sound wave travels, 340 m/s in air, 1500 m/s in liquids and 5000 m/s through metal.

An area of empty space with no air molecules.

Rapid movement back and forth which can cause a sound.

Vacuum

Vibration

Lesson 3:- Loudness and Pitch

Audible Range

Hertz

Infrasound

Kilohetrz

Loudness

Oscilloscope

Pitch

Ultrasound

A particular range of frequencies you can hear between 20-20,000 hertz

The unit to measure frequency, 1 Hert is one wave passing a point per second.

Frequencies below 20Hz

1000 Hertz

How the amplitude affects a sound.

Device which can show what a sound wave looks like on a screen.

The tone of the sound (high or low) depending on the frequency of a wave.

Frequencies above 20,000Hz

Lesson 4:- Detecting sound

Amplify

Auditory Canal

Auditory Nerve

Cochlea

To make a sound louder.

Small passageway sound waves travel down into the ear.

Carries signals from the ear to the brain.

A liquid filled part of the ear filled with tiny hairs which detect vibrations and convert the movement to electrical impulses.

The measurement of sound intensity (dB)

A flexible plate inside a microphone.

Decibel

Diaphragm

Ear

Eardrum

Inner Ear

Middle Ear

The part of the body which allows us to hear sounds

Flexible film which vibrates when sound waves reach it.

Part of the ear containing the semi-circular canals and the cochlea

The ossicles.

Ossicles

Outer Ear

Tiny bones which vibrate and amplify the sound.

The pinna, auditory canal and eardrum.

Pinna The part of the ear you can see which directs sound into the auditory canal

Semi-circular canals These help you balance.

Lesson 5:- Echoes and Ultrasound

Echo

Receiver

Reverberation

Transmitter

When sound reflects off of a surface.

Something that detects reflected sound waves

When lots of echoes join together to make a longer sound

Something that sends out sound waves.

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