Assess It! Part 2 KESLER
SCIENCE
Use the vocabulary words from "Read It" to complete the
following sentences.
When rocks break apart into smaller pieces, it is called
(4)
Changes in temperature can cause rocks to
become slightly larger, or (5).
and become
slightly smaller, or (6)
This is often seen with a
type of weathering called (7)
where water
freezes and thaws inside the cracks of rocks. Another
type of weathering is called (8).
I
where the salt
that is left behind when water evaporates can cause
pressure in cracks of the rock.

Words are

Mechanical
Weathering
Depositon
Expand
Contract
Freeze thaw
Frost wedging
Salt wedging
Evoparte

This unit is divided into 3 Arcs. Arc 1 answers the essential question, “What is weather and what factors influence

the weather?” The learning activities included in this arc guide students to use observation skills in order to

describe, explain, and predict weather patterns. Students will learn that the sun’s energy is the driving force of our

weather. They will complete activities to learn about wind, clouds, precipitation, temperature, and the role the

water cycle plays in our weather.

In Arc 2, students examine the essential question, “How does the ocean affect our weather?” Students will

complete activities to help them describe and explain the gulf stream, El Nino, La Nina, Sea and Land Breezes as

well as hurricanes.

Arc 3 allows students to investigate the essential question, “How does weather affect our lives?” Students will

complete activities to help them explain why our choices are based on the weather, as well as the impact that

climate change as on ecosystems. During the culminating activity in Arc 3, students research how to prepare for

extreme weather. Students have several opportunities to use their observations skills while working on their

nature journal

Explanation:

i think its the first one

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.