Grade 1 - A History Of The Earth

The History of the Earth: Supplemental Guide PP | Pausing Point 87

For pressure, have students use their hands to press against their

thighs. Ask the students if they can feel the pressure on their legs.

For time, have students say “tick-tock, tick-tock” to pretend to be

a clock.

Have students practice these signals until they are comfortable

using them.

Tell students that you are going to play a word game. Explain that

you will say a word and they are to give the signal for that word:

heat, pressure or time. Tell students that you are going to call on

volunteers to explain how the word they selected from the choices

of heat, pressure or time is related to the word you said.

Suggested words: magma, core, volcano, eruption, steam, geyser,

lava, island

Letter to a Geologist

Materials: Writing paper, writing tools

As a class, brainstorm ideas and then write a letter to Gerry or a

real geologist. The students may talk about the cool things that

geologists do, or ask questions that they still have about the

history of the earth.

You may also ask students to write individual letters if they are

ready to do this activity on their own.

Create a Geyser

Materials: small plastic bottle with a narrow neck, warm water,

liquid soap, effervescent tablets, large tub or sink

Note: This experiment is messy and may be best completed

outside.

Have student volunteers break the effervescent tablet into small

pieces. Put the pieces aside for a few minutes and then fi ll the

bottle about ¾ full with warm water. Explain to students that the

water in a real geyser is extremely hot because it has been heated

by the magma underground, but hot water could cause burns, so

warm water is being used instead. Ask a volunteer to add a few

drops of liquid soap to the bottle and to place the bottle in the tub