PebbleGo Important Inventions

Before cameras were invented, how did people record, or show, what they saw?

• recording a video

• telling people what they saw

• drawing a picture

• making a youtube video

What did Louis Daguerre put film into after exposing it to light when he was making the first camera?

• soap

• chemicals

• darkness

• a closet

Today, many cameras are _______, and do not need film.

• digital

• large

• expensive

• helpful

Each of the _______ on a clock moves at a different speed.

• lines

• feet

• numbers

• hands

Many of today's clocks are digital. They no longer show hands, but instead have _________ on a screen to tell the time.

• numbers

• arrows

• answers

• hands

People were able to tell the time before clocks were invented by looking at the __________.

• moon

• stars

• sun and shadows

• time

Tags

NGSS.MS-ESS1-1

Radios helped send messages quickly through the _______.

• ground

• people

• air

• phone

Tags

NGSS.MS-PS4-2

NGSS.MS-PS4-3

Why were radios more popular in the 1930s than they are now?

• radios were bigger then

• there were better radio stations

• they built better radios then

• people didn't have TVs to watch

Who invented the telephone?

• Lonnie Johnson

• Alexander Graham Bell

• Heinrich Heintz

• Albert Einstein

What problem did cell phones solve?

• they are fun to use

• people like to use them

• they give you good ideas

• you can talk to people anywhere