Question

1. what does it mean to use a resource sustainably? using resources sustainably means 18. name an example of a \service\ provided by ecological systems. 19. how did the formation of the environmental protection agency (epa) signal a new approach to environmental policy? section 4: critical thinking & application (6 points) answer the following question in complete sentences. 20. experimental design: a student notices that household plants near the window seem to grow faster than plants in a darker corner of the room. they wonder if light is the cause. ● state a testable hypothesis for this observation. ● identify the independent variable (the factor you change) in an experiment to test this. ● identify one factor that must be kept constant (controlled variable) to make it a fair test. testable hypothesis(if__ i do this then__): independent variable(factor that is changed): controlled variable (kept the same/constant):

Explanation:

1. Using resources sustainably means using them in a way that meets the needs of the present without compromising the ability of future generations to meet their own needs. This involves managing resources efficiently, reducing waste, and protecting the environment.
2. An example of a "service" provided by ecological systems is pollination. Pollinators such as bees, butterflies, and birds transfer pollen from one plant to another, enabling plants to reproduce. This is crucial for the production of fruits, vegetables, and nuts, as well as for the survival of many plant species.
3. The formation of the Environmental Protection Agency (EPA) signaled a new approach to environmental policy by creating a centralized federal agency with the authority and resources to protect the environment. The EPA was tasked with developing and enforcing environmental regulations, conducting research, and providing education and outreach on environmental issues. This represented a shift from a more fragmented and decentralized approach to environmental protection to a more coordinated and comprehensive one.
4. Testable Hypothesis: If I place plants in different levels of light intensity, then the plants in brighter light will grow faster.

• Independent Variable: Light intensity. This is the factor that is changed in the experiment to test the hypothesis.
• Controlled Variable: Plant type. To make it a fair test, the same type of plant should be used in all experimental conditions to ensure that any differences in growth are due to the light intensity and not the plant species.

Answer:

1. Using resources in a way that meets present - day needs without sacrificing future - generation needs.
2. Pollination.
3. Creation of a centralized federal agency for environmental protection.
4. Testable Hypothesis: If I place plants in different levels of light intensity, then the plants in brighter light will grow faster.

Independent Variable: Light intensity.
Controlled Variable: Plant type.