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Classifying Matter Atoms & the Periodic Table Solutions & Chemical Compounds & Reactions Solutions & Radioactivity Force and Motion 10 Point 10 Point 10 Point 10 Point 10 Point 20 Points 20 Points 20 Points 20 Points 20 Points 30 Points 30 Points 30 Points 30 Points 30 Points 40 Points 40 Points 40 Points 40 Points 40 Points 50 Points 50 Points 50 Points 50 Points 50 Points

What do elements, compounds, and molecules all have in common? A. They are all made of atoms. B. They can exist only in a solid form. C. All of them are chemically the same. D. All of them can be chemically broken down.

A. They are all made of atoms.

Marc is making a model of an atom Marc is making a model of an atom. Which of these characteristics of an atom should he bear in mind while making the model? A. An atom consists mostly of electrons. B. An atom consists mostly of empty space. C. The electrons in an atom are larger than the protons. D. The protons are present outside the nucleus of an atom.

B. An atom consists mostly of empty space.

Which of these phase changes involves a decrease in molecular motion? A. liquid changing to solid B. solid changing to liquid C. liquid changing to gas D. solid changing to gas

A. liquid changing to solid

Why do molecules of liquid water move about freely, while molecules of ice are fixed in place? A. Liquid water molecules are lighter. B. Liquid water molecules have more energy. C. Liquid water molecules are round and smooth. D. Liquid water molecules can change shape easily.

B. Liquid water molecules have more energy.

When matter changes from one phase to another, the change involves absorbing or releasing energy. Which change involves absorbing heat energy? A. ice to water B. water to ice C. water vapor to ice D. water vapor to water

A. ice to water

Sodium carbonate (Na2CO3) is a compound used in making glass Sodium carbonate (Na2CO3) is a compound used in making glass. Which elements make up this compound? A. sodium and cobalt B. sodium, carbon, and oxygen C. nitrogen, aluminum, and cobalt D. nitrogen, aluminum, carbon, and oxygen

B. sodium, carbon, and oxygen

Ramar is using the periodic table to identify elements Ramar is using the periodic table to identify elements. Where should Ramar look to find the least reactive elements? A. on the far left of the periodic table B. on the far right of the periodic table C. at the very top of the periodic table D. at the very bottom of the periodic table

B. on the far right of the periodic table

What is the symbol of the element found in sodium chloride that is a metal and has an atomic number of 11? A. Cl B. N C. Na D. S

C. Na

Which gas would LEAST LIKELY be part of a chemical reaction? A. Cl B. H C. Ne D. N

C. Ne

Which of the following is true ONLY of a substance made of one element? A. The substance is made only of molecules. B. It can react with substances made of different elements. C. All of the atoms in the substance are chemically the same. D. It can be broken down chemically into different kinds of atoms.

C. All of the atoms in the substance are chemically the same.

Sodium (Na) is a metal, and chlorine (Cl) is a nonmetal that typically exists as a gas. When these two elements combine, they form sodium chloride (NaCl). Which statement best describes sodium chloride? A. Sodium chloride is a mixture because it is made from two different elements and has the same properties as the individual elements. B. Sodium chloride is a mixture because it is made from two different elements and has different properties than the individual elements. C. Sodium chloride is a compound because it is made from two different elements and has the same properties as the individual elements. D. Sodium chloride is a compound because it is made from two different elements and has different properties than the individual elements.

D. Sodium chloride is a compound because it is made from two different elements and has different properties than the individual elements.

Which list contains only elements? A. Steel, bronze, brass B. Ammonia, fluoride, nitrate C. Carbon, helium, nitrogen D. Quartz, silicon, phosphates

C. Carbon, helium, nitrogen

Val combined chemicals X and Y, which retained their original properties. By combining these chemicals Val made A. a mixture. B. a compound. C. a larger atom. D. a new element.

A. a mixture.

Carolyn filled a small vial half full of water and added a tablespoon of ammonium nitrate. She capped the vial immediately and shook it to dissolve the ammonium nitrate. The water and ammonium reacted, and the temperature of the vial changed. How will the mass of the solution formed compare to the mass of the water and ammonium nitrate? A. The mass of the solution will be greater. B. The mass of the solution will be less. C. The mass of the solution will be the same. D. The mass cannot be determined.

C. The mass of the solution will be the same.

In a laboratory, an electric current was passed through water In a laboratory, an electric current was passed through water. This separated 18 grams of water into 2 grams of hydrogen and 16 grams of oxygen. The same hydrogen and oxygen were then allowed to react completely with each other to produce water. How much water was produced? A. 16 grams B. 18 grams C. 20 grams D. 34 grams

B. 18 grams

Some punch is made by mixing a powdered flavoring into water Some punch is made by mixing a powdered flavoring into water. The water changed to the same color as the powder. From this evidence you could assume that the flavoring A. dissolved into the water, which is a physical change. B. dissolved into the water, which is a chemical change. C. created a new substance, which is a chemical change. D. created a new substance, which is a physical change.

A. dissolved into the water, which is a physical change.

An element undergoes radioactive decay in which the mass number and atomic number are unchanged. What type of radioactive emission MOST LIKELY occurred? A. beta decay B. delta decay C. alpha decay D. gamma decay

D. gamma decay

Which statement BEST describes the difference in penetration between alpha, beta, and gamma radiation? A. Alpha and beta radiation can be stopped by thick layers of lead or concrete, while gamma radiation can be stopped by a thin sheet of paper. B. Alpha and beta radiation can be stopped by a thin sheet of paper, while gamma radiation can be stopped by thick layers of lead or concrete. C. Alpha and beta radiation can be stopped by thick layers of lead or concrete, while gamma radiation can be stopped by wood that is a few centimeters thick. D. Alpha and beta radiation can be stopped by wood that is a few centimeters thick, while gamma radiation can be stopped by thick layers of lead or concrete.

D. Alpha and beta radiation can be stopped by wood that is a few centimeters thick, while gamma radiation can be stopped by thick layers of lead or concrete.

Radioactive substances can emit different types of radiation Radioactive substances can emit different types of radiation. Which type of radiation has the largest mass? A. beta radiation B. alpha radiation C. x-ray radiation D. gamma radiation

B. alpha radiation

In nature, uranium-238 undergoes a series of 14 decays before it reaches a stable isotope. Which statement BEST describes this process? A. The process is accompanied by the release of energy. B. The process can be sped up, slowed down, or stopped. C. The process produces the same element but with fewer particles. D. The process is affected by small changes in temperature, pressure, or volume.

A. The process is accompanied by the release of energy.

The velocity of a bus is determined by its A. speed. B. location. C. speed and direction. D. location and direction.

C. speed and direction.

Which two factors affect the strength of the gravitational pull between objects? A. mass and shape B. mass and distance C. shape and velocity D. distance and velocity

B. mass and distance

Scientists launch a rocket into space Scientists launch a rocket into space. What is the effect of the gravitational force on the rocket as the rocket travels farther away from Earth? A. The gravitational force increases due to the gravity of other planets. B. The gravitational force increases as the weight of the rocket increases. C. The gravitational force decreases due to the acceleration of the rocket. D. The gravitational force decreases as the distance between Earth and the rocket increases.

D. The gravitational force decreases as the distance between Earth and the rocket increases.

Which of these describes the force that keeps the planets revolving in their orbits? A. magnetic fields acting on the orbits of the planets B. magnetic fields balancing the charges of the planets C. gravitational pull acting from a distance on the planets D. gravitational pull increasing with increases in distances between the planets

C. gravitational pull acting from a distance on the planets

Scientists discovered that an object weighs more on Jupiter than on Earth. Which of these features of Jupiter causes this phenomenon? A. stronger gravitational pull than Earth B. more gaseous atmosphere than Earth C. weaker magnetic field than that of Earth D. lower surface temperature than that of Earth

A. stronger gravitational pull than Earth

Final Jeopardy Make your wager

B. Arrow 1 represents reflection and arrow 2 represents refraction.