Question

properties of matter test - do not write on this test handout. 1. the stuff a pencil is made up of is a lot different than the stuff a teddy bear and water is made up of. what is this stuff called? a. chemicals b. matter c. mass d properties 2. an astronaut brought back to earth some rocks from the moon. which measurement of the rocks was different on the moon than here on earth? a. mass b. weight c. volume d. density e. length 3. the table shows the density of four liquids as compared to water. each liquid is insoluble (does not dissolve) in water.

liquid	density (g/ml)
b	1.64
c	0.83
d	0.77

if the four liquids were poured into a beaker of water, which liquid would form a layer below the water? a. a b. b c. c d. d 4. matter has two basic properties: physical properties and chemical properties. which of these statements best describes physical properties of matter? a. physical properties are identical for all matter under the same conditions. b. physical properties are observed by seeing how a substance reacts with other substances. c. physical properties can be observed without changing the identity of a substance. d. physical properties cause atoms and molecules to change structure when substances are mixed. 5. joshua came across a solid, rocky object while exploring the woods behind his house. he observed that it was a grayish color and very smooth and shiny. which physical property of the rock is joshua observing? a. density b. volume c. luster d. malleability 6. which of the following objects does not have the physical property of thermal conductivity? a. metal pipe b. large marble c. concrete sidewalk d. wooden spoon 7. mr. mcleod is stirring sugar into a pitcher of iced tea. which physical property of the sugar allows it to be dissolved? a. melting point b. boiling point c. solubility d. malleability 8. mikayla often leaves her bicycle outside, even when it rains. mikaylas bicycle has now begun to rust. the rusting bicycle is an example of which of the following? a. a physical change b. a chemical change c. a change in the state of matter d. a physical property of matter 9. a mass of a block of gold is 386 grams and its volume is 20 ml. what is the density of the block of gold? density = mass ÷ volume a. 366 g/cm³ b. 406 g/cm³ c. 19.3 g/cm³ d. 0.05 g/cm³ 10. brandons mom has made a pitcher of iced tea. she has added 2 cups of sugar to the tea and is stirring it. no matter how long she stirs, some of the sugar will not dissolve in the tea. what has happened in this situation? a. the tea is too hot for the sugar to completely dissolve b. the tea has reached its saturation point c. there is too much tea for the sugar to dissolve in d. none of these has happened

Explanation:

1. Matter is the stuff that everything is made of. Pencils, teddy - bears, and water are all made of matter.
2. Weight is the force exerted on an object due to gravity. Gravity is different on the Moon than on Earth, so weight changes. Mass, volume, density, and length remain the same.
3. A liquid with a density greater than water (1 g/mL) will sink below water. Liquid B has a density of 1.64 g/mL, greater than water.
4. Physical properties can be observed without changing the identity of a substance, such as color, texture, etc.
5. Luster refers to the way a substance reflects light. A smooth and shiny rock has luster.
6. Wood is a poor thermal conductor compared to metal, marble, and concrete.
7. Solubility is the ability of a substance to dissolve in a solvent. Sugar's solubility allows it to dissolve in iced tea.
8. Rusting is a chemical change as it involves a chemical reaction between iron in the bicycle and oxygen in the air to form iron oxide.
9. Using the density formula $\text{Density}=\frac{\text{Mass}}{\text{Volume}}$, with mass = 386 g and volume = 20 mL, density = $\frac{386}{20}=19.3$ g/mL (1 mL = 1 $cm^{3}$).
10. When a solution has reached its saturation point, no more solute (sugar) can dissolve in the solvent (tea) regardless of stirring.

Answer:

1. B. matter
2. B. weight
3. B. B
4. C. Physical properties can be observed without changing the identity of a substance.
5. C. luster
6. D. wooden spoon
7. C. solubility
8. B. A chemical change
9. C. 19.3 g/cm³
10. B. the tea has reached its saturation point