Science 09Ruo Final Exam Review

Using a periodic table, find the atomic mass and write it properly for: Hydrogen 1 H Helium 4 He Carbon 12 C Oxygen 16 O

Using a periodic table, find the atomic mass and write it properly for: Magnesium 24 Mg Calcium 40 Ca Aluminum 27 Al Silicon 28 Si

Write the fusion equations for → 24 Mg 2( 12 C )→ 24 Mg → 4 He 4( 1 H )→ 4 He → 16 O 4( 4 He)→ 16 O

Write the fusion equations for → 28 Si 2( 12 C )+ 4 He → 28 Si 2( 14 N) → 28 Si → 27 Al 1 H + 12 C + 14 N→ 27 Al → 56 Fe 2 ( 28 Si)→ 56 Fe

Drawing Bohr Diagrams Start by drawing the nucleus – p = atomic number (number of protons) – n = number of neutrons The number electrons = number of protons The electrons fill the orbits around the nucleus – First orbit can hold up to 2 electrons – Second orbit can hold up to 8 electrons – Third orbit can hold up to 8 electrons

Draw the Bohr Diagram for Ar Argon: Mass=40, Atomic Number = 18 Number of neutrons = Atomic Mass – Atomic Number =40 – 18 = 22 neutrons p18 n22

Draw the Bohr Diagram for P Phosphorous: Mass=31, Atomic Number = 15 Number of neutrons = Atomic Mass – Atomic Number =31 – 15 = 16 neutrons p15 n16

Draw a circuit with: Two resistors in series Two batteries in parallel Connect an ammeter to measure the current of ONE battery Connect a voltmeter to measure the current of ONE lamp Answer on the next slide

Suppose: The voltage of each battery was 9 V The voltage of the resistor was 3 V The current was 1.5 A What is the voltage of the other resistor? Ans 6 V voltage of the sources have to add up to the voltage of loads (resistors). The two batteries are in parallel, so their voltage is 9 volts What is the resistance of the resistor connected to the voltmeter? V = IR 3 = 1.5(R) 2 = R The resistance is 2 ohms What is the resistance of the other resistor? V = IR 6 = 1.5(R) 4 = R The resistance is 4 ohms

Ohm’s Law V = I × R What is the resistance of a hair dryer which is plugged into a 110 V outlet and draws 10 A of current? Answer on next slide

Ohm’s Law V = I × R What is the resistance of a hair dryer which is plugged into a 110 V outlet and draws 10 A of current? V = I × R 110 = 10 × R ohms = R

What’s my risk? A couple of parents do not have Huntington’s disease, but are carriers of the Huntington’s gene. 1.What is the genotype of a person who has Huntington’s disease? 2.What are the genotypes of the parents? 3.Create a punnet square to figure out the risk of their children having Huntington’s disease. Answer on the next slide

1.What is the genotype of a person who has Huntington’s disease? If we use the letter h, the genotype would be hh (homozygous recessive) 2.What are the genotypes of the parents? Parents would be heterozygous Hh 3.Create a punnet square to figure out the risk of their children having Huntington’s disease. Hh HHHHh h hh There is a 25% chance of their children getting Huntington’s disease There is a 50% chance their children will be carriers of the Huntington’s gene There’s a 25% chance that their children would not be carriers of the Huntington’s gene

1 AU = 1.49E8 km Earth is 1 AU from the sun. If Mercury is 57.9E6 km from the sun, how many AU is Mercury from the sun? 1 AU = x AU 1.49E857.9E6 1 × 57.9E6 = x × 57.9E6 1.49E857.9E = x

Diploid, haploid Body cells are Diploid Gametes are Haploid If the diploid number is 24, the haploid number is 12