*Question*
You are presented with the question "What can prevent food spoilage?" and the following answer choices:  - prolactin release  - one celled organisms  - hydrating food  - cleaning food  - airing out food  - Electric generators  - a hydraulic system  - dehydrating food  Now knowing that dehydrating food is used for preserving food and preservatives Preservatives are required to prevent spoilage, choose the best answer.
**Answer**
dehydrating food

*Question*
You are presented with the question "What can change the color of an environment from green to brown?" and the following answer choices:  - the ocean  - a lack of water  - rain  - harmful substances  - sleet  - deforestation  - Greenhouse gases  - Greenhouse gasses  Now knowing that adrought can change the color of an environment from green to brown and due to the drought, there is no water, choose the best answer.
**Answer**
a lack of water

*Question*
You are presented with the question "sunlight and rain can cause light to do what?" and the following answer choices:  - break off  - renew  - observe it  - kill them  - light up  - heat  - freeze  - refract  Now knowing that sunlight and rain can cause a rainbow and raindrops refract light into rainbows, choose the best answer.
**Answer**
refract

*Question*
You are presented with the question "Producing impulsion causes an object to do what?" and the following answer choices:  - It expands  - heat energy  - heating liquids  - imbalanced  - sweating  - squeeze  - reflecting light  - It will move.  Now knowing that producing thrust causes something to move and impulsion is thrust, the release of stored energy into engagement, choose the best answer.
**Answer**
