Fill in the blanks to complete the statements.
1. Changes in materials becomes useful because they are beneficial to us and it does not ______ the environment.
2-3. These changes in materials can either be ______ change or ______ change.
4. Digging a hole in the ground or using a big container to make a ___________ to put decaying materials is a good way to help the environment by lessening the amount of waste.
5. Recycling is a beneficial to the environment for it turns_______ materials into useful objects.
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Answers & Comments
1. Use
2. Physical
3. Chemical
4. Compose pit
5. Physical