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SS > SCIENCE > Flashcards

SCIENCE Flashcards

1
Q

Where do electromagnetic waves come from originally, and how do they travel?

A

Come from the sun, and travel through space

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2
Q

What types of electromagnetic radiation have the highest frequency? What kind of energy? What is their wavelength?

A

Gamma
Higher energy–shorter wavelength

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3
Q

How can we measure frequency? How can we measure wavelength

A

Frequency= # of waves that pass through a given point in a certain amount of time.
Wavelength= Distance between a point on one wave to the exact same point on another wave

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4
Q

What types of radiation can cause human harm

A

gamma, X-ray and ultra violet

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5
Q

What types of electromagnetic radiation is used for Cooking? Communication?

A

Cooking= microwave communication= radio

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6
Q

when light bounces off of a surface its called

A

Reflection

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7
Q

When objects take in light its called

A

absobtion

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8
Q

when light bends as it passes through a new medium it’s called

A

Refraction

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9
Q

What does refraction do to objects? how does it make these objects appear to us?

A

Magnafiys or minifys
Changes the size

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10
Q

Objects that are transparent allow light to___

A

pass through

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11
Q

List at least three examples of transparent objects

A

water glass window plastic wrap

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12
Q

When an object is translucent, how does light interact with it?

A

Some light passes through

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13
Q

Three examples of translucent items

A

Lampshade eyelid window shade

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14
Q

Opaque objects allow____

A

No light to pass through

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15
Q

Three examples of opaque objects

A

A tree, A wall, and a car

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16
Q

Visible light is part of the __________ spectrum

A

electromagnetic

17
Q

When light passes through a prism, it is broken up into these colors.

A

ROYGBIV

18
Q

When colors are reflected off of an object what happens

A

you see those colors

19
Q

what do we see when all the colors are absorbed

A

Black

20
Q

Why are red and green used for stoplights

A

Because they are the most sensitive to your eye,

21
Q

Why is the sky blue

A

Blue light reflects off of

22
Q

Light rays enter the_____to bend the light and help the eye focus. It then passes through the ______. The amount of light allowed to pass through is controlled by the _______. At this point, the light passes through the ______ which focuses on the ______. Here it hits ______, which turns light into electrical signals. These signals pass to the brain through the ____ nerve

A

Cornea, pupil, iris, lens, retina, photoreceptors, optic

23
Q

What is a convex mirror shaped like, and why?

A

The outside of a bowl, because it curves outwards.

24
Q

When we see images in a convex mirror they appear,

A

smaller

25
Q

Rays of light, meet at the _____ point behind the mirror

A

focal

26
Q

What is a concave mirror shaped like? why?

A

the inside of a bowl. Because it curves inward.

27
Q

What is a concave mirror shaped like? why?

A

the inside of a bowl. Because it curves inward.

28
Q

Lenses not only reflect light, they also…

A

refract it

29
Q

The human eye is what kind of lens?

A

CONVEX

30
Q

What does the cornea do?

A

It bends light, and helps the eye focus

31
Q

What does the pupil do?

A

The pupil allows light to enter the eye, by changing size

32
Q

What does the iris do?

A

It controls the amount of light to pass through

33
Q

What does the lens do?

A

It transmits light, focusing it on the retina

34
Q

Retina do?

A

It coverts light into electrical signals

35
Q

What do photoreceptors do?

A

It detects light

36
Q

what does the optic nerve do?

A

carries messages from the retina to the brain

SS (5 decks)

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