Practice
1. Which of the following elements is malleable?
A. Iron B. Hydrogen C. Carbon D. Sulfur
2. Which of the following elements has the physical property of conductivity?
A. Copper B. Carbon C. Iodine D. Oxygen
3. The volume of a 16 gram rock is determined by water displacement to be 4 mL. Which of the following will happen if this object is placed in a container of water?
4. Twenty milliliters of a liquid has a mass of 25 grams. What is the density of this substance?
A. 0.8 g/mL B. 1 g/mL C. 1.25 g/mL D. 500 g/mL
5. Which of the descriptions below does not describe a physical change?
A. A physical change can occur if there is a change in the state of matter.
B. A physical change can occur if a new substance is formed.
C. A physical change can occur when sugar dissolves in water.
D. A physical change can occur when charcoal is smashed with a hammer
6. Which of the following does not describes a chemical change?
A. A chemical change can occur if there is a change in the state of matter.
B. A chemical change can occur if a new substance is formed.
C. A chemical change can be observed if a new gas or odor is produced.
D. A chemical change can occur when a precipitate is formed.
7. Which of the following are all examples of physical changes?
A. sharpening a pencil, adding vinegar to baking soda, cutting a tree
B. dissolving salt in water, a plant decomposing, digesting pizza
C. dissolving salt in water, sharpening a pencil, water evaporating
D. calcium chloride and water, mixing salt and pepper, ammonia and grape juice
8. Which of the following are all examples of chemical changes?
A. sharpening a pencil, adding sugar to baking soda, cutting a tree
B. dissolving salt in water, sharpening a pencil, a plant decomposing
C. combining baking soda and vinegar, digesting a slice of pizza
D. nail rusting, digesting a slice of pizza, milk and vinegar forming a precipitate
10. Which of the following is evidence that a chemical change has taken place?
A. temperature change without adding heat or cold
B. ice melting
C. boiling water
D. one substance dissolving in another
11. Ice cream melting is an example of a
A. physical property
B. chemical property
C. physical change
D. chemical property
12. Which of the following is NOT an example of a chemical change?
A. Digesting food
B. Nail rusting
C. Milk souring
D. Sugar dissolving in water
13. What is a precipitate?
A. A type of color change
B. A type of odor produced during a chemical change
C. A solid substance that is formed during a chemical change
D. A gas produced during a chemical reaction