2. What is the difference between homogeneous and heterogeneous matter? Cite one example of each 3. Compare an element to a compound. List 2 examples of each
4. Contrast an atom to a molecule
5. List the 3 subatomic particles, their charges, locations, and mass
6. Why is an electron the lightest subatomic particle
7. What are quarks? How many are needed to make up one subatomic particle. List the 6 flavors of quarks
8. What is a solution? Cite 3 examples
9. What is the difference bettween a mixture and a compound? Cite one example
10. List and define the 4 states of matter

Researchers determine that the biodiversity in a woodland region is declining. they identify two major threats to the region's biodiversity, a method to address each threat, and the expected outcome of each method. this information is shown in the table. a) reforestation would not benefit many species because most forest species live on the ground. b) reforestation would take the longest time to be effective because trees take several years to grow. c) biological augmentation would benefit only a few species because is is typically not very effective. d) biological augmentation would take less time to ve effective because it targets the majority of prey species.

Madison pushes with a 210-n horizontal force on a 24-kg crate of coffee resting on a warehouse floor. the force of friction on the crate is 74 n. what is the acceleration?

Consider a system with two masses that are moving away from each other. why will the kinetic energy differ if the frame of reference is a stationary observer or one of the masses?