Changes on Planet Earth
Unit Review Sheet
These facts and definitions should be mastered throughout this unit. This page can be used for periodic review and study as you are finishing the unit and in the future.
Facts and Definitions
Lesson 1: What Causes Change?
- You see changes by observing.
- Observe means to watch something very closely to learn more about it.
- Change is when something becomes different over time.
- A cause is an action or something that makes something else happen.
- The thing that happens as a result of the cause is the effect.
Lesson 2: What Changed?
- Location is where something can be found in the environment.
- Amount, size, color, weight, and location are all ways that objects can change.
Lesson 3: Changing Position
- A force is a push or pull.
- A force (push or pull) can change the motion of an object in three ways: go faster, go slower, or change the direction of the motion.
- A force (push or pull) is needed to start objects moving or to stop objects that are moving.
- An index is a part of a book that tells you on what pages certain topics or keywords can be found in the book. The index appears near the end of the book.
Lesson 4: Changes in the Environment
- Environmental changes are changes that happen in nature.
Lesson 5: Changes in Location
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Lesson 6: Changes in the Sky
- The Earth rotates on its axis.
- The Earth revolves around the Sun.
- The Moon revolves around the Earth.
Lesson 7: Living Things Change
- All living things change.
Lesson 8: Plants and Change
- A table of contents appears near the beginning of a book; it lists the different sections in the book and the page numbers where they can be found.
- Plants have roots, stems, leaves, and sometimes flowers, fruits, or vegetables.
- Plants need dirt, water, and sunlight to grow and change.
Lesson 9: Heat Causes Change
- When ice is heated, it turns into water.
- When water is heated, it turns into steam.
Lesson 10: Chemical Changes
- Physical change is a change in size, shape, color, or state of matter.
- Chemical change occurs when a new substance is formed.
Lesson 11: People Change the Environment
- Reducing means using less of something, while reusing means using something more than once.
- Recycling is the process of changing waste to reusable material.
Final Project: Mobile of Change
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