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Matter
Matters
Periodic
Patterns
Elements
Compounds
Mixtures
Physical or Chemical
Watery Mass
100
Today, the observation that an air bubble in water rises to the surface is explained by the principle of--

A. viscosity
B. buoyancy
C. interference
D. polarity

What is
B. buoyancy
100
The bonding characteristics of oxygen are most similar to the bonding characteristics of--

A. hydrogen
B. silicon
C. helium
D. sulfur

What is
D. sulfur
100
An unknown silvery powder has a constant melting point and does not chemically or physically separate in to other substances. The unknown substance can be classified as--

A. an element
B. a compound
C. a mixture
D. an alloy

What is
A. an element
100
Which of these changes in rocks is a physical change?

A. Acid rain damaging marble
B. Iron in rock combining with oxygen to form hematite
C. Carbonic acid weathering limestone
D. An ice wedge shattering a slab of shale.

What is
D. An ice wedge shattering a slab of shale.
100
The mass of a rusty bicycle is found to be slightly greater than the mass of the same bicycle before it rusted. The change in mass indicates that the rusting process--

A. is a physical change
B. involves an energy-to-matter conversion
C. decreases the density of the metal
D. involves metal bonding with other atoms

What is
D. involves metal bonding with other atoms
200
A 500 mL quantity of vanilla ice cream has a mass of 400 grams. The manufacturer then bubbles air into the ice cream so that its volume increases by 300 mL. What is the ice cream's approximate final density?

A. 0.30 g/mL
B. 0.50 g/mL
C. 0.80 g/mL
D. 1.30 g/mL

What is
B. 0.50 g/mL
200
Which of these elements is most like to gain one electron?

A. O
B. Cl
C. Cs
D. Be

What is
B. Cl
200
A model shows an element with 4 protons and 5 neutrons. What element is being modeled?

A. Boron
B. Beryllium
C. Hydrogen
D. Fluorine

What is
B. Beryllium
200
Which of the following processes is an example of physical change associated with an oak tree?

A. Decomposition of bark by bracket fungi
B. Starches and sugars being broken down during energy production
C. Water and carbon dioxide being converted to glucose
D. Evaporation of water from surfaces of leaves

What is
D. Evaporation of water from surfaces of leaves
200
Liquid 1 and Liquid 2 react to produce a solid and gas. Which of the following expressions correctly chose how to determine the mass of the gas?

A. (mass of Liquid 1 + mass of Liquid 2) - (mass of solid)
B. (mass of Liquid 1 + mass of Liquid 2) + (mass of solid)
C. (mass of Liquid 1 × mass of Liquid 2) ÷ (mass of solid)
D. (mass of Liquid 1 - mass of Liquid 2) ÷ (mass of solid)

What is
A. (mass of Liquid 1 + mass of Liquid 2) - (mass of solid)
300
A block of maple wood with a volume of 405 mL and a density of 0.67 g/mL is sawed in half. The density of the two smaller blocks is now--

A. one-fourth the original density
B. one-half the original density
C. two times the original density
D. the same as the original density

What is
D. the same as the original density
300
A certain atom has a nucleus containing six protons and eight neutrons and has six electrons orbiting the nucleus. This atom is a form of the element--

A. silicon
B. carbon
C. magnesium
D. calcium

What is
B. carbon
300
Nitrogen (N2) is an example of--

A. an alloy
B. a salt
C. a mixture
D. a molecule

What is
D. a molecule
300
Sheets of ice containing mostly pure water can be formed by decreasing the temperature of saltwater. Which of these best describes this change?

A. Chemical change
B. Physical change
C. Nuclear change
D. Atomic change

What is
B. Physical change
300
Bathwater normally has electrolytic behaviors even though distilled water does not. This is because bathwater--

A. contains isotopes of hydrogen
B. has been heated
C. is separated into H+ and OH- ions
D. contains dissolved minerals

What is
D. contains dissolved minerals
400
A sample of an element has a volume of 79.0 mL and a density of 1.85 g/mL. What is the mass in grams of the sample? Record and bubble in your answer to the nearest tenth on the answer document.
What is 146.2 g (146.1 g-146.3 g)
400
The ionic compounds that result from combining Group 1 and Group 17 elements have a 1:1 ratio because--

A. Group 1 contains hydrogen and sodium.
B. Group 1 elements are alkaline metals
C. Group 1 elements have one valence electrons
D. Group 1 elements are more reactive than other elements

What is
C. Group 1 elements have one valence electrons
400
Be2+ PO43-

According to this information, what is the chemical formula for beryllium phosphate?

A.Be3(PO4)2
B. BePO3
C. Be3(PO4)3
D. Be6PO4

What is
A.Be3(PO4)2
400
Rust (Fe2O3) forms on an iron (Fe) pipe after prolonged exposure to humid air. What type of change does this illustrate?

A. Mechanical
B. Nuclear
C. Chemical
D. Physical

What is
C. Chemical
400
Which of these remains the same while water molecules go through the water cycle?

A. The ratio of oxygen to hydrogen in the molecule
B. The rate of vibration of the molecules
C. The kinds of dissolved substances between molecules
D. The amount of energy the molecules can absorb

What is
A. The ratio of oxygen to hydrogen in the molecule
500
Swimmers find that they can float more easily in the ocean than in a freshwater pond. The most likely reason for this phenomenon is that the--

A. viscosity of pond water is greater than that of ocean water
B. density of ocean water is higher than that of pond water
C. temperature of pond water is lower than that of ocean water
D. mass of ocean water is greater than that of pond water

What is
B. density of ocean water is higher than that of pond water
500
Calcium ions play an important role in the function of neurons in the grain. Elements that are chemically similar to calcium can interfere with the function of neurons. Which of the following is most likely to imitate calcium's role in the function of neurons?

A. Sodium
B. Potassium
C. Strontium
D. Rubidium

What is
C. Strontium
500
Saltwater is an example of--

A. Compound
B. Element
C. Mixture
D. Isotope

What is
C. Mixture
500
Which of the following is an example of a chemical change?

A. Ice cracking
B. sugar dissolving
C. milk souring
D. lead melting

What is
C. milk souring
500
Which characteristic of water best explains its ability to dissolve a great variety of materials?

A. Its transparency in light
B. Its electrical conductivity
C. Its physical state of matter
D. Its molecular arrangement


D. Its molecular arrangement