1. 10th Grade DCAS Review Questions
Warm up Suggestions

2. 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?

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

4. 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?

5. 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.

6. 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.

7. Warm up #3: Answer

8. 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?

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

10. 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.

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

12. 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

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

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.

15. Warm up #7: Answers

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

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

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

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

20. 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

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