Light And Electricity

Question 1

Atom?

Answer 1

Smallest unit of matter. Cannot split

Question 2

Neutron?

Answer 2

Part of atom, no electrical charge, neutral

Question 3

Electron?

Answer 3

Negatively charged, orbit neucleus

Question 4

Proton?

Answer 4

Positively charged

Question 5

Atomic number?

Answer 5

Number protons

Question 6

Charging by contact?

Answer 6

Process transferring charge by touching or rubbing.

Question 7

Circuit?

Answer 7

Path electric current flow

Question 8

Closed circuit?

Answer 8

Complete path.

Question 9

Open circuit?

Answer 9

Break to stop.

Question 10

Conductor?

Answer 10

Material electricity passes.

Question 11

Insulator?

Answer 11

Material electricity doesn’t pass through easily

Question 12

Current electricity?

Answer 12

Steady flow of electric charge.

Question 13

Electric circuit?

Answer 13

Complete path electricity flows

Question 14

Electroscope?

Answer 14

Instrument detecting electrical charge

Question 15

Friction?

Answer 15

Force exerted when two substances rubbed together. Electrons transferred by rubbing.

Question 16

Law of conservation of charge?

Answer 16

Can be transferred from object to object but cannot be created or destroyed.

Question 17

Lightning?

Answer 17

Static discharge. Huge spark. Souring stormwater in clouds becomes electrically charged. Electrons jump from areas with negative charge to areas with positive charge. As they jump they produce a spark.

Question 18

Matter?

Answer 18

Takes up space, has mass

Question 19

Parallel circuit?

Answer 19

Two, more branches for electricity to flow.

Question 20

Series circuit?

Answer 20

One path for current to flow.

Question 21

Static discharge?

Answer 21

Accumulation of excess electric charges on object. It is the build up of charges on object.

Question 22

Current number?

Answer 22

Number of electrons which flow through wire per second

Question 23

Voltage?

Answer 23

Energy forces electrons around circuit. Battery supplies pressure

Question 24

Resistance?

Answer 24

Amount of force opposing current.

Question 25

What is static electricity?

Answer 25

The imbalance of positive and negative charges.

Question 26

Why can't you generate static electricity when you rub conductors against each other?

Answer 26

Conductors direct charge flow to earth.

Question 27

What does friction do?

Answer 27

It stops things from moving easily.

Question 28

What is the difference between static and current electricity?

Answer 28

Static electricity : does not move. Simple build up of electrons Current electricity: move along a contactor and it is the flow of electrons

Question 29

What is Electric current?

Answer 29

What is the flow of electrons from atom to atom. When do you electrons move from one atom to another atom they cause another electron to move when electrons move from atom to atom electricity.

Question 30

What is a resistor?

Answer 30

Material that resists but it doesn't stop the current

Question 31

What is a series circuit?

Answer 31

Electrons have one path to flow Weirton one bulb or anything on or off it won't turn everything on or off. Electrical devices she electrical pressure when you add electrical appliance each gets less electrical pressure

Question 32

What is a parallel circuit?

Answer 32

More than one path for electrons to flow and you can reach any appliance at any time as long as each loop has its own switch. Appliances down to electrical pressure each appliance gets the full voltage.

Question 33

What is light?

Answer 33

Visually perceived radiant energy. Small part of electromagnetic spectrum and ranges in wavelengths 380nm to 780nm

Question 34

What do light waves do?

Answer 34

They transfer energy without transferring matter.

Question 35

Color?

Answer 35

Property object produced by wavelength of light object reflects.

Question 36

Dispersion?

Answer 36

Spread or scattered different wavelengths of white light into a spectrum of colors as passes through a prism or drop

Question 37

Emit?

Answer 37

To give of something as the sun gives off light.

Question 38

Light?

Answer 38

Energy emitted by son or chemical reaction to which eye is sensitive

Question 39

Luminescent ?

Answer 39

To glow or to give of lights at low temperatures.

Question 40

Magnify?

Answer 40

Small things bigger by looking through one or more convex lenses.

Question 41

Prism?

Answer 41

Three sided length of glass which scatter different wavelengths of white light into spectrum of colors as passes through prism

Question 42

Reflect?

Answer 42

Bounce off

Question 43

Refraction?

Answer 43

Speed of light in a vacuum exactly 299,792,458 m/s. In reality light slows down and changes direction slightly when passing through a medium.

Question 44

Translucent?

Answer 44

Allow some light to pass through but scatters the light in process so images are not clear at the other side.

Question 45

Transparent?

Answer 45

Light passes through and images of clear on the other side.

Question 46

Opaque?

Answer 46

Does not let light pass through.

Question 47

Name four properties of light.

Answer 47

Light travels in straight lines light is much faster than sound shadows are formed when light is blocked reflection: angle of incidence equals angle of reflection

Question 48

What happens when waves strike material?

Answer 48

Reflection: wave bounce back Transmitted: goes through Refraction: wave change speed or direction Absorption: transferred to object mainly as heat. Wave gives up energy.

Question 49

Effects of refraction?

Answer 49

Why water appears shollower than is. | Occurs because light bends.

Question 50

Convex lens?

Answer 50

Rays of light pass, closer together

Question 51

Concave lens?

Answer 51

Rays of light pass, diverge

Question 52

Properties that lenses have in common?

Answer 52

Parallel rays pass through refracted rays, converge/ diverge so appear to come from one point: principal focus Distance between principal focus and center lens: focal length