Review 1
Explain the difference between a pure substance and a solution.
A. Pure substances are clean and identical, while solutions are assorted and mixed.
B. In a pure substance all atoms are identical, but solutions have multiple types of atoms.
C. Pure substances have a low volume, but solutions have a high volume.
B. In a pure substance all atoms are identical, but solutions have multiple types of atoms.
Paula determines a property of a marble using a balance and a graduated cylinder. What property is Paula most likely determining by using both tools?
A. length
B. mass
C. density
C. density
What is a unique quality water has that is different from other matter when changing from a solid to a liquid?
A. Water's solid state is more compact than it's liquid state.
B. Water's liquid state is more compact or dense than it's solid state.
C. Water's liquid and solid state have the same level of density/compactness.
B. Water's liquid state is more compact or dense than it's solid state.
How does 250 mL of water compare to 500 mL of water?
A. They have the same melting point but different boiling points.
B. They have the same density but different volumes.
C. They have the same boiling point, but different melting points.
B. They have the same density but different volumes.
Define atom.
The smallest form of matter.
The building block of matter.
A student has two identical boxes. The student fills one box with bundled newspapers and the second box with feathers. Which statement about the boxes is most accurate?
A. the masses of the boxes are the same
B. the volumes of the boxes are the same
C. the boxes have the same densities
B. the volumes of the boxes are the same
You are asked to identify a pure substance. Which of the following physical properties will help you determine the substance?
A. shape
B. melting point
C. texture
B. melting point
Which state do molecules/atoms take up the most amount of space?
A. Solid
B. liquid
C. gas
C. gas
Karen found two pieces of gold on two different continents and melted them. Why did two different pieces of gold have the same melting point?
A. Gold is a metal with high conductivity.
B. The melting point of all metals is the same.
C. Gold is composed of the same types of atoms.
C. Gold is composed of the same types of atoms.
Define element.
A pure substance.
Any material that cannot be broken down into more fundamental substances.
A scientist is trying to describe an element by using the substance's physical properties. The scientist CANNOT use which of the following to help determine the substance?
A. Burning, bubbling, rusting
B. Appearance, texture, density
C. Mass, volume, solubility
A. Burning, bubbling, rusting
A student has two solid samples of iron. Which property do the substances most likely have in common?
A. density
B. mass
C. volume
A. density
Which is composed of matter?
A. electricity
B. an atom
C. light
B. an atom
Two pieces of copper wire are rolled into a coil to make a bracelet. Which statement describes copper wire?
A. Both copper wires are different because they came from different sources.
B. Both copper wires are the same because they are able to bend.
C. Both copper wires are made of the same types of atoms.
C. Both copper wires are made of the same types of atoms.
Define density.
how compact or concentrated something is.
Mass/Volume
Sally and Kirby are flying a hot air balloon from Charleston, SC to Folly Beach. When they get close to their destination the pilot turns off the burner. Why did the pilot do this?
A. The heat energy in the hot air balloon will decrease but the air molecules in the balloon will not change density levels.
B. The heat energy in the hot air balloon will decrease causing the air molecules in the balloon to become less dense.
C. The heat energy in the hot air balloon will decrease causing the air molecules in the balloon to become more dense.
C. The heat energy in the hot air balloon will decrease causing the air molecules in the balloon to become more dense.
Ricardo measured an empty graduated cylinder on a triple beam balance. He then filled the graduated cylinder with 50 mL of a liquid and measured the cylinder again. Which question is Ricardo most likely trying to answer?
A. How quickly will the liquid boil?
B. What is the mass of the liquid?
C. What is the volume of the liquid?
B. What is the mass of the liquid?
How are the atoms in an object affected when the temperature of the object increases?
A. They join together.
B. They vibrate faster.
C. They vibrate slower.
B. They vibrate faster.
What change occurs when a liquid evaporates?
A. The particles absorb heat and get closer together.
B. The particles absorb heat and spread farther apart.
C. The particles release heat and get closer together.
B. The particles absorb heat and spread farther apart.
Define molecule.
A group of atoms bonded together
A student examined blocks made of different substances (plastic foam, aluminum, lead). The blocks all had the same length, width, and height. Which statement most likely describes each of the 10 mL blocks?
A. The blocks have different masses.
B. The blocks have the same hardness.
C. The blocks have the same density.
A. The blocks have different masses.
What happens to steam during condensation?
A. It loses energy and changes to a liquid.
B. It loses energy and changes to a gas.
C. It gains energy and changes to a liquid.
A. It loses energy and changes to a liquid.
In which situation would the atoms in an object begin to move closer together during a phase change?
A. Heat is removed as a gas turns into a liquid.
B. Heat is removed as a liquid turns into a gas.
C. Heat is added as as solid turns into a gas.
A. Heat is removed as a gas turns into a liquid.
Two identical beakers containing water are placed in the sun. Beaker 1 contains 50 mL of water and Beaker 2 contains 100 mL of water. What effect will the sun have on the water in each beaker?
A. The water in beaker 2 will heat faster because the volume of the water is greater.
B. The water in beaker 2 will heat faster because the density of the water is greater.
C. The water in beaker 1 will heat faster because the volume of water is lower.
C. The water in beaker 1 will heat faster because the volume of water is lower.
amount of space something takes up.