Quick dr. stevens observes that squirrels in the wild eat nuts, fruit, and insects. she wonders which of the food sources makes young squirrels grow the fastest. she separates thirty young squirrels into two equal groups. she feeds one of the groups nuts and she feeds the other group insects. the group of squirrels that eats the nuts grows faster than the group of squirrels that eats the insects. what question could dr. stevens ask next if she wants to continue studying about squirrel growth rate? a. do squirrels like the taste of nuts more than they like the taste of fruit? b. are squirrels that eat nuts happier than squirrels that eat fruit or insects? c. do squirrels that eat nuts grow faster than squirrels that eat fruit? d. are squirrels that eat nuts cuter than squirrels that eat fruit or insects?

19. explain why a magnet from your refrigerator could not be used to lift something as heavy as a car. (chapter 7 – pages 202-203) 20. can a magnet ever have a single pole? explain your answer. (chapter 7 – page 208) 21. what happens to the wavelength of a wave if the frequency is increased? (chapter 9 – pages 280-281) 22. an ocean wave has a wavelength of 10 m and a frequency of 4.0 hz. what is the velocity of the wave? show the appropriate equation from your book and show your work with units. (chapter 9 – page 282) 23. as you sit outside, the sound of a siren becomes lower in pitch. is the emergency vehicle moving away from or towards you? explain how you know. (chapter 10 – page 315-316) 24. why are two astronauts in space unable to hear one another? (chapter 10 – page 307) 25. explain in at least 3 sentences how electromagnetic waves form. (chapter 11 – page 338-339) 26. using the chart on page 345 in your textbook, what are the three types of electromagnetic wave with wavelengths shorter than those of visible light. give an example of each. (chapter 11 – pages 345-351) 27. explain why a leaf usually appears to be green, but a rose typically appears red. (chapter 12 – page 373) 28. what is the difference in light that is refracted compared to light that is reflected? think in terms of speed of light as well as what happens to light waves when they interact with a medium. (chapter 12 – pages 369-370) 29. how are concave and convex lenses different? (chapter 13 – page 408-410) 30. what type of mirror is used in rearview mirrors in cars? why is it important that these mirrors have the warning, “objects in mirror are closer than they appear.”? (chapter 13 – page 405)

Frank just graduated from eighth grade. assuming exactly four years from now he will graduate from high school how many seconds does he have until his high school graduation

What is the state of matter with a specific volume but no definite shape