1. State Test Practice: Chemistry
Copy the Key Ideas onto your answer document
State Test Practice: Chemistry

2. Need to move 31 to the physics section
Answer questions 20-31

3. Key idea: An atom is composed of protons, neutrons, and electrons
Answer is C

4. Key idea: An atom is composed of protons, neutrons, electrons
Answer is D

5. Atoms
Brain Pop Break

6. Key idea: Compounds form when two or more elements chemically combine, with new properties
Mg and O2 are both elements
MgO is has different properties than either element individually
So MgO is a compound- answer is C
Examples:
Elements: Mg, O2, H, Na, Cl
Compounds: H2O, NaCl, MgO
Mixtures: Kool-aid, chocolate
milk, salt water

7. Compounds and Mixtures
Brain Pop Break

8. Key idea: The states of matter depend on molecular motion matter
Solids – locked in position and vibrate
Liquids – loosely connected .They slide, glide, and collide
Gases- move independently and collide frequently
Answer is C
Increasing motion

9. Key idea: All elements have a chemical symbol
Find the element symbol on the periodic table and the answer will appear!!!

10. Key idea: All elements have a chemical symbol
Find the element name on the periodic table and the answer will appear!!!

11. Key idea: Elements are grouped into metals/nonmetals/metalloids on PT
These elements are all located to the right of the stair step/zig zag line. They are all nonmetals.

12. Key idea: Elements are grouped into metals/nonmetals/metalloids on PT
Nonmetals are located t o the right of the stair step
Answer is C

13. Periodic Table
Brain Pop Break

14. Key idea: Isotopes have same # of protons but different # of neutrons
An isotope is an atom with the same # of protons, but a different # of neutrons than other atoms of the same element.

15. Isotopes
Brain Pop Break

16. Key idea: Elements have different physical and chemical properties
Metals conduct electricity, are shiny, ductile, and malleable.
Answer is A

17. Key idea: Elements have different physical and chemical properties
Metals are good conductors of heat and electricity. They also melt at high temperatures compared to nonmetals.
The answer is D

18. Metals
Brain Pop Break

19. Label the element square
Atomic #
Element symbol
Element name
Atomic mass

20. Key idea: Density determines whether an object sinks or floats
Whether an object sinks or floats in water is determined by an object’s density.
Less dense = float
More dense = sink
B is the correct answer

21. Answer questions 37-44

22. Key idea: Compounds form when two or more elements chemically combine, with new properties
Cu and O react to form a compound
Compounds always have properties different from the elements that make up the compound
So A is correct

23. Key idea: Matter cannot be created or destroyed in a chemical reaction
Count the atoms on both sides of each equation to see if they are equal.
Don’t forget to multiply coefficients and subscripts
Correct answer is C

24. Chemical Equations
Brain Pop Break

25. Key idea: Chemical reactions usually absorb or give off heat
Chemical reactions give off thermal energy which is heat
Correct answer is D

26. Key idea: In a physical change a material changes form with no chemical reaction.
Ice is still water, just in the solid state.
The molecules lose energy and become locked in place when water freezes.
Answer is C

27. Key idea: pH scale measures the strength of an acid or base
pH > 7 is a base
pH < 7 is an acid
pH of 7 is neutral
The further away from neutral the stronger the acid or base
Answer is A

28. Acids and Bases
Brain Pop Break

29. Key idea: Carbon can form many bonds with itself and other elements and is essential to life
Carbon can form straight chains, branched chains and rings
Answer is C

30. Key idea: Carbon can form many bonds with itself and other elements and is essential to life
Carbon is the backbone of many large molecules called polymers
The answer is D

31. Key idea: Carbon can form many bonds with itself and other elements and is essential to life
You are looking for a compound containing carbon
C6H12O6 is sugar and is essential to life
Answer is A

32. Body Chemistry
Brain Pop Break