Science - 2019-20

K.10 - Earth and Space Systems: Changes

The student will investigate and understand that change occurs over time. Key ideas include

a)  natural and human-made things change over time;

  • describe things in nature that change over time. Bloom's Level:  Understand
  • describe human-made things that change over time.  Bloom's Level: Understand

b)  living and nonliving things change over time;

  • identify some changes that people experience over time Bloom's Level:  Understand
c)  changes can be observed and measured; and
  • use observations to describe the change of an object or living thing over timeBloom's Level:   Understand

d)  changes may be fast or slow.
  • classify examples as fast changes or slow changesBloom's Level:  Analyze
Adopted: 2018


Systems may exhibit stability and/or change depending on conditions.  These changes can be observed and measured.  Some of the changes happen quickly, while others may happen so slowly it is hard to see the changes.


  • Change occurs over time.
  • Change can be fast or slow depending upon the object and conditions.
  • As people grow, they change.
  • Not all things change at a rate that can be observed easily.
  • Many changes can be measured.


Essential Questions

  • Why is change important?
  • How can change be observed and measured?
  • How do humans change the world around us?

In order to meet this standard, it is expected that students will

  • identify some changes that people experience over time (e.g., height, weight, and color of hair).
  • predict how their own height will change over the school year. Measure and graph the information.
  • describe how people cause things to change (e.g., demolition of buildings, construction of buildings, cutting down trees, planting trees, and building highways).
  • describe how things change naturally. This includes seasonal changes, trees changing throughout the seasons, water in a stream washing away rocks and soil, rocks breaking off a mountain and animals and plants growing to include changes in height and weight..
  • identify examples of fast changes and slow changes. Slow changes should be the kinds of familiar changes that occur over weeks, months, or seasons. Faster changes include a weather event such as a blizzard or tornado, an earthquake or fire.


change - to transform

fall - also known as autumn; season between summer and winter

measure - to determine the amount or degree of something using an instrument or device marked in standard units

observe- to notice using any one of your five senses

season - four divisions of the year; spring, summer, fall and winter; marked by particular weather patterns and daylight hours; resulting from the earth's changing position with regard to the sun.

spring- season between winter and summer; lasting from March to June; weather becomes warmer and leaves and plants start to grow again

summer- the season between spring and autumn, lasting from June to August; weather is warm/hot

winter- season characterized by cold temperatures, often son; between December and February 

Updated: Nov 03, 2019