10th Grade DCAS Review Questions Warm up Suggestions

Science Review Warm up #1 An element is made of just one type of atom. Which of the following is an element? A. Sugar (C6H12O6) B. Water (H2O) C. Salt (NaCl) D. Aluminum (Al) Bonus: What term would describe the other three?

Warm up #1: Answers The correct answer is D. Aluminum is an element. The other three (water, sugar & salt) are called compounds.

Science Review Warm up #2 When observing periodic table of elements, How are the elements arranged? Alphabetically By reactivity By Color By atomic number Bonus: What does the answer tell you about the protons & electrons in an element?

Warm up #2: Answers The correct answer is D. Elements Are arranged by atomic number. The atomic number will tell you the number of protons & electrons the element has.

Science Review Warm up #3 Draw a picture of what you think an atom looks like and label the parts using the following terms: nucleus, electron, neutron and proton. Bonus: Include the electrical charge of each atom particle.

Warm up #3: Answer

Science Review Warm up #4 How are isotopes of an element different from one another? They have more electron shells They have a different number of protons They have a different number of neutrons They have a different number of electrons Bonus: What cartoon series hometown baseball team has the nickname Isotopes?

Warm up #4: Answers The correct answer is C. Isotopes of an element have a different number of neutrons. Bonus: The Simpsons

Science Review Warm up #5 How does chemical bonding create stability for elements? It gives the element a full valence electron shell It gives the element more neutrons It gives the element an empty valence electron shell It gives the element more protons Bonus: Name two types chemical bonds.

Warm up #5: Answers The correct answer is A. Chemical bonds: ionic and covalent

Science Review Warm up #6 From the periodic table element Aluminum, please identify the following: atomic number electron number number of valence electrons atomic mass number of neutrons

Warm up #6: Answers atomic number = 13 electron number = 13 number of valence electrons = 3 atomic mass = 27 Number of neutrons = 14

Science Review Warm up #7 When viewing the periodic table, tell which side (right, left, middle) of the table you would find the following: nonmetals, metalloids and metals.

Warm up #7: Answers

Science Review Warm up #8 How many atoms of each element are present in the following compound: C6H12O6 3H2SO4

Warm up #8: Answers 6 carbon atoms, 12 hydrogen atoms and 6 oxygen atoms 6 hydrogen atoms, 3 sulfur atoms and 12 oxygen atoms

Science Review Warm up #9 In the chemical equation, identify the reactants and products. Carbon dioxide + water  glucose +oxygen

Warm up #9: Answers Reactants: carbon dioxide and water Products: glucose and oxygen

Science Review Warm up #10 Which of the following chemical equations agrees with the law of conservation of matter? (or which equations is balanced?) 2H2 + O2  2H2O H2 + O2  H2O C3H8 +  H2O + CO2 CH4 + 2O2  2H2O +CO2

Warm up #10: Answers The answer is A and D