I want to thank all of you for the great help, especially teachergroupie! i have been studying my fannie off! here's a list of questions for all of you math and science experts! 1. we see a sketch of a bathtub and need to be able to figure out its volume and time for it to fill at a certain rate! 2. also, could someone explain the seasons in a simple way. i know that the earth tilts around the sun, but all of the pictures i have been viewing are a bit confusing for me. 3. how would waves come up in a question and what are we suppose to know about waves? ocean waves? or electromagnetic waves? 4. summer or any soltice? is this in any of the ed hersh books (4th, 5th, 6th grade books), and in what way would they want us to know them? 5. chemical reaction...is this refering to say for instance the periodic table nobel gasses that are located on the very far right side of the table as you are looking at the diagram. nobel gasses are non-reactive, because they are non-metals and do not conduct heat. 6. comets are made of particles of dust and ice (i looked it up !) 7. do you add salt to an icy road to make it melt? like rock salt? but you use rock salt to make ice cream! 8. limestone is made up of organic matter, and calcium carbonate due to runoff water, is this correct? 9. how would one prove that opposite sides of a parallegram are congruent through use of congruent triangles? 10. do we need to understand neap tides, spring tides? does anyone care to explain this? will we need to draw them in a diagram? 11. water and weather off the coast of calif.? is this because when you have a large body of water the temperature stays more constant? and the weather is greatly influenced by this because of the mountains which block out other weather influences? am i close? 12. hot spots in the ocean...are they subduction zones, volcanos or tectonic plates? 13. greatest common multiple and lowest common multiple, could someone explain in a simple way please? i get these confused. 14. the path of the sun in the northern hemisphere during the summer/winter soltices and fall/spring equinox? will we have to explain this and draw it out? can someone give a simple concise explanation? 15. do we need to know that if two hydogens touch they form helium? is that right? 16. ph scale... such as citric being an acid? isn't it an acid? or amonia being a base. what is vineger? 17. dna, is in the nuclues and it contains the genetic information? what else? can anyone elaborate? 18. does anyone know how to prove the sum of all exterior angles of a convex polygon which is 360 degrees? 19. what in the world is a non-euclidean geometry sphere? someone said they thought i was the sum of angles of a triangle that are geater than 180 degrees, not equal to? help please!!! 20. i can't remember what a tree diagram is...is this like a t-chart? 21. petals of a flower are to attract bees to take the pollen elsewhere for pollination. is that right? 22. air pressure question...does air want to travel from high to low pressure in an attempt to make the pressures the same? 23. is rust or fungi on limestone physical aging? i thought limestone was mostly found in caves, and was made of calcium carbonate due to runoff? 24. do we need to know that seeds of plants germinate (roots grow down and the sprouts grow up) due to plants response to gravity which is called geotropism? would they want us to be this specific? 25. lets say there is a plant in a see through container and there are tubes coming out and bubbles inside the container...to describe what is happening would we talk about the chemical reaction of condensation and lack of oxygen. is there a carbon dioxide reaction taking place inside the enclosed container, and what are the tubes for? complex, but this one can be an elementary classroom science experiment to describe what ever is going on. is it respiration? help please! well that is really enough and i will be so grateful if somebody answers all of the above. these are the ones i am confused about. lets help eachother pass this subtest on sat.