Name:______Period:______
Chemistry Mid-Unit Test Study Guide
Directions: Read the scenario and answer the questions that follow.
Mr. Letts wants to know if drinking protein shakes will make him stronger. He had a group of 20 people drink a protein shake daily for 2 weeks, while another group of 20 people drank chocolate milk daily. At the end of two weeks, he had each person lift a 50 lb weight as many times as they could and recorded their number.
1. Write a possible hypothesis for this experiment. ______
Identify the:
2. Independent Variable ______
3. Control Group______
4. Dependent Variable ______
Directions: In the blanks below, determine whether the object identified is either matter or not matter. Mark your answer on the answer sheet as follows:
A. Matter B. Not Matter
5. ______Light
6. ______Oxygen
7. ______Fire
8. ______Water vapor
9. ______Dreams
10. List 3 physical properties you could identify for any liquid:
______
______
______
Directions: For each description determine if it is a description of a physical change or a chemical change. Record your choice on your answer sheet using the following choices: (1 point each)
A. physical change B. chemical change.
11. ______Snowman melting.
12. ______Blending ice cream and milk to make a milkshake
13. ______Instant ice pack
14. ______Dying your hair
15. ______Clothes shrinking in the wash
Directions: Identify the state of matter that is being described in the following statements. Write the state of matter on the line. (1 point each)
16. ______Made of particles that slide past each other slowly.
17. ______Does NOT have a definite shape or volume (they both change)
18. ______Made of particles that are spaced far apart and move quickly.
19. ______It’s volume stays the same, but its shape changes.
20. Draw a picture of an atom. Be sure to label the following parts: proton, neutron, electron, nucleus, electron cloud.
21. Complete the chart below.
Element / SymbolNa
Oxygen
Ca
Potassium
P
Cl
Iron
C
Hydrogen
N
Sulfur