Ecosystem and the Food Web

1. Where do plants get the materials they need for growth and development?

2. How does photosynthesis sustain plants and certain kinds of animals? 

3. How is the sun’s energy made usable? 

Chemical Reactions and Properties of Matter

1. When matter changes, does it's weight change?

2. How can attributes of an object be measured and represented using different units? 

3. Can you describe and analyze interactions or changes in a substance through observation and measurement? 

4. What evidence indicates a new substance is formed by mixing two or more substances? 

Earth's Interactive Place in the Universe

1. How did scientists learn about gravitational force?

2. When objects are dropped, which object will hit the ground first?

3. How does increasing the distance between two objects change the force of gravity between those objects ?

4. How does changing the mass of two objects change the force of gravity between those objects? 

5. How do forces interact with objects? 

Human Impact on Earth's Systems

1. What are the four major layers and systems of the Earth?

2.  What are the components of our atmosphere and how is the atmosphere affected by animals and plants ?

3. Where is the water on Earth located? How much of this water is usable by humans? What effect does ocean water have on nearby land?

4. What makes a healty ecosystem?