AccelePrep for the ACT Test 2nd Edition Student Text

C HAPTER 10 | F AST T RACK TO S CIENCE M ECHANICS • 193

5. (A) 6FLHQFH 6FLHQWLÀF ,QYHVWLJDWLRQ $SSOLFDWLRQ Since capillaries have the largest relative total surface area of any vessels (bottom graph), as well as the lowest blood velocity (3 cm/s), it is inferable that an even larger surface area (as in the newly discovered people of the Amazon) should result in slower blood velocity. 6. (G) Science/Evaluation of Models/ &RPSUHKHQVLRQ Š‡ ˜‹‡™’‘‹– ‘ˆ…‹‡–‹•– ͳ •’‡…‹ϐ‹…ƒŽŽ› •–ƒ–‡• that “there is only so much energy in the universe.” 7. (A) Science/Evaluation of Models/Analysis If the galaxies are moving away from each other with a constant speed, then there is no force pulling them back. 8. (J) 6FLHQFH (YDOXDWLRQ RI 0RGHOV $SSOLFDWLRQ Scientist 1 argues that the universe will spread out forever, so he would claim that it does not Šƒ˜‡ •—ˆϐ‹…‹‡– ƒ•• –‘…‘ŽŽƒ’•‡Ǥ ȋ Ȍ ‹• ™”‘‰Ȅ‹ˆ the mass is equal to m , then the universe will collapse.

9. (A) Science/Evaluation of Models/Analysis Scientist 2 would claim that the average temperature of the universe would be higher in ten billion years than it is now, since the energy will be more concentrated. It is also helpful to note that Scientist 2 states, “The idea that the universe will spread itself too thin and freeze is •‡”‹‘—•Ž› ϐŽƒ™‡†Ǥdz 10. (H) Science/Evaluation of Models/ &RPSUHKHQVLRQ Again, Scientist 1 says, “there is only so much energy in the universe.”