Homework alle

Allegra Guzmán del Rio Januaruy,5,2013

#13 4.A

¿When light goes in to a new material it?

changes direction

reflectsstays in a

straight line

1

Which of the following is an artificial light source?

The sun

The moon

A bonfire

2

What do we need to make a light bulb work?

Electric current sun

water

3

What device products light by current trough a gas?

A neon sign

A prism

A flash light

4

What can you infer about the environment the anglerfish lives in?

It must extremely dark

It must extremely

bright

It must be filled with other fish

5

What could you use to split whit light into its component colors?

A flashlight

A prism

A light bulb

6

Only a minute portion of the electromagnetic spectrum can be seen whit the human eye. In this context, what does minute mean?

60 seconds

small

large

7

When you look at your teacher´s face, how can you see it?

Light reflects off of her face

Her face emanates light

Light refracts through her face

8

high

low

none

Conductors have high or low resistance?

9

watts

kg

km

Electrical power is measured by which units?

10

100°

150°200°

Which is the boiling point of water?

11

watering

Melting point

Boiling point

How do we call the temperature at which solids melts into liquids?

12

gas

liquid

solid

Ithas no rigid structure, but it has a fixed volume

13

1

2

3

How many states of matter there are?

14

liquid

matter

light

Anything that has mass and takes up space

15

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