Answers TX-Integrated Physics and Chemistry A-CRUnit Test

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Four students are analyzing four different substances and recording their findings in this table.Which most describes this table?

Leonna has a solid, Xiao and Blake have liquids, and Amir has a gas.

Leonna and Amir have gasses, Xiao has a liquid, and Blake has a solid.

Leonna has a solid, Xiao has a liquid, Blake has a gas, and Amir made a mistake.

Leonna has a solid, Xiao has a liquid, Blake made a mistake, and Amir has a gas.

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Which property of physical changes explains why matter is conserved in a physical change?

The arrangements of particles do not change, and the bonds between atoms do not break.

Mass, not energy, changes in a physical change.

Energy and mass change in a physical change.

The bonds between atoms do not break; it is only the arrangement that changes.

When hydrogen peroxide bubbles, it is undergoing a chemical change. Which statement best describes what is happening?

The atoms in hydrogen peroxide are breaking apart and forming new types of molecules.

The atoms in hydrogen peroxide are breaking apart and recombining into the original molecules.

The molecules of hydrogen peroxide remain intact as new types of molecules form and move out of the liquid.

The molecules of hydrogen peroxide remain intact but move more quickly to allow evaporation.

Which ranks these materials by the attraction between their atoms from the weakest to the strongest?

oxygen gas, liquid water, liquid honey, solid iron ore

liquid water, liquid honey, oxygen gas, solid iron ore

solid iron ore, liquid honey, liquid water, oxygen gas

oxygen gas, liquid honey, liquid water, solid iron ore

During which changes of state do atoms that cannot move past one another become free to move?

vaporization and sublimation

boiling and deposition

sublimation and melting

condensation and melting

Ella makes this table to organize her notes on whether atoms gain or lose energy during the changes of state.

freezing, boiling, and melting

melting, vaporization, and sublimation

sublimation, deposition, and condensation

freezing, deposition, and condensation

Which example illustrates a chemical change?

shredding paper

smashing a soda can

burning wood

chopping wood

Which statement gives two characteristics of all liquids?

They spread out to fill space and have atoms that vibrate in place.

They have atoms that vibrate in place and have a definite shape.

They will change shape to fit a container and have definite volume.

They have definite volume and have atoms that move freely in all directions.

Marco wants to investigate the chemical properties of sodium bicarbonate, or baking soda. He plans to carry out the tests below.Test 1: Mix a teaspoon of sodium bicarbonate into a cup of warm water to see if it dissolves.Test 2: Mix a teaspoon of sodium bicarbonate into a cup of vinegar to see if it fizzes.Test 3: Heat a teaspoon of sodium bicarbonate in the oven to see if its melting point is less than 400 degrees Fahrenheit.

Only Test 3 will indicate a chemical property of sodium bicarbonate. Tests 1 and 2 will show a physical property of the substance.

Only tests 1 and 2 will indicate chemical properties of sodium bicarbonate. Test 3 will show a physical property of the substance.

Only Test 2 will indicate a chemical property of sodium bicarbonate. Tests 1 and 3 will show a physical property of the substance.

Only tests 1 and 3 will indicate chemical properties of sodium bicarbonate. Test 2 will show a physical property of the substance.

Which state(s) of matter have no definite shape or volume?

liquids and solids

liquids and gasses

gasses

solids

A cylinder at left with balls in a layer on the bottom of the cylinder has an arrow leading to a cylinder at right with balls stacked near the bottom of the cylinder.

Atoms gain energy as a solid changes to a gas.

Atoms gain energy as a liquid changes to a gas.

Atoms lose energy as a solid changes to a gas.

Atoms lose energy as a liquid changes to a gas.

The atoms in a sample are close together but can slide past one another. As the atoms lose energy, they move slower. The atoms become locked in place because of attractive forces between them.

gas to solid

gas to liquid

liquid to solid

solid to liquid

What happens to the total mass of a substance undergoing a physical change?

It stays the same.

It doubles.

It triples.

It is reduced.

What is conserved in physical changes?

shape

energy

mass

density

An amount of nitrogen undergoes a physical change and increases its volume. What can be known about this physical change?

The boiling point of the nitrogen increased.

The mass of nitrogen increased.

The color changed.

The density changed.

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