You are presented with the question "What is something that changes an ecosystem?" and the following answer choices:  - seasons  - herbicide  - animals  - Pesticides  - flooding  - wind  - influenza  - climate  Now knowing that seasons cause change to the environment and an ecosystem is an environment and all the members of that environment, choose the best answer.
seasons


You are presented with the question "condensation in the air and humidity are caused by?" and the following answer choices:  - Sun  - kinetic  - heat  - Joules  - climate  - sweat  - boiling  - water  Now knowing that water vapor condensing in clouds causes rain and humidity is the amount of water vapor in the air, choose the best answer.
water


Q: You are presented with the question "A rubber band snapping causes the particles in the rubber band to" and the following answer choices:  - Rise  - Loose  - energy  - heat  - sound  - expand  - waves  - struck  Now knowing that arubber band snapping causes the particles in the rubber band to vibrate and heat causes molecules of the material to vibrate, choose the best answer.
A: heat


Question: You are presented with the question "Muscles require substances transported in the body by" and the following answer choices:  - sugar  - food  - fibers  - fat  - neurons  - blood  - glucose  - bones  Now knowing that oxygen is just one substance transported by the blood and active brains and muscles require more oxygen and nutrients, choose the best answer.
Answer: blood


*Question*
You are presented with the question "What do animals do when the available nutrients in an environment decrease?" and the following answer choices:  - basic building blocks of life  - depress neuronal excitability  - they leave to find them  - they plant seeds  - they stay  - Plant growth is reduced  - they live like normal  - body temperature reduces  Now knowing that if the amount of available food and water decreases in an environment then animals may leave that environment to find food and water and food and water provided to patients by mouth is the usual means of providing nutrition to patients, choose the best answer.
**Answer**
they leave to find them


You are presented with the question "What allows plants to absorb energy from the sun?" and the following answer choices:  - Mitochondria  - Chlorophyll  - peachleaf willow  - Vacuoles  - carbon dioxide  - color of leaves  - an electron lens  - Cell walls  Now knowing that chlorophyll is used for absorbing light energy by plants and sun emits light energy, choose the best answer.

Chlorophyll