WBMS Checkpoint #5 Review

During an experiment, Alex observes a container with oil, water, and marbles. The different substances are visible and can be separated by hand or with simple tools.

• A solution

• A compound

• A homogenous mixture

• A heterogenous mixture

Olivia mixes salt into a cup of water and stirs until the salt is no longer visible. The resulting solution appears uniform throughout. What type of mixture has Olivia made?

• A compound

• A heterogenous mixture

• A homogenous mixture

• A suspension

According to the Kinetic Molecular Theory, what happens to the pressure of a gas if the number of collisions between gas particles and the container walls increases?

• The pressure decreases

• The pressure increases

• The pressure stays the same

• The pressure becomes zero

Maria accidentally leaves a can of soda in the sun. When she opens it, the soda quickly bubbles over. According to the Kinetic Molecular Theory, what is the main reason for this reaction?

• The soda can was rolled on the ground before opening.

• The gas particles in the soda became less energetic and settled at the bottom.

• The heat made the gas particles in the soda move faster, increasing the pressure inside the can.

• The soda absorbed all the sunlight and evaporated.

Tags

NGSS.MS-PS1-4

When water is heated, what does the Kinetic Molecular Theory say about the movement of its molecules as the temperature rises?

• The molecules slow down and move closer together.

• The molecules move faster and spread farther apart.

• The molecules stop moving completely.

• The molecules change into a different substance.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

According to the Kinetic Molecular Theory, how do particles in a substance behave as temperature increases?

• They become larger in size

• They move more quickly

• They stop moving completely

• They combine to form new substances

Tags

NGSS.MS-PS1-4

Which of the following is NOT a characteristic described by the Kinetic Molecular Theory?

• Gas particles are in constant, random motion.

• Gas particles collide with each other and the walls of the container.

• All particles in a gas have identical masses.

• The temperature of a gas is related to the average kinetic energy of its particles.

Sarah places a rock, a cup of juice, and a balloon filled with helium on a table. She observes that each item has weight and occupies space, even though they are different substances. What does this observation show about matter?

• Only liquids are considered matter

• Matter can be in different forms but always has mass and volume

• Solids and gases are not types of matter

• Matter must be heavy to exist

Tags

NGSS.5-PS1-2

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According to the pie chart titled 'Distribution of States of Matter in Earth's Environment,' which state of matter is the least abundant?

• Liquids

• Solids

• Gases

• Plasma

Water is essential for life and has unique properties. It is a ________ made of ________ hydrogen atoms and ________ oxygen atom. The ________ nature of water molecules results in strong ________ bonds between them. This allows water to dissolve many substances, earning it the title of a ________ solvent. Water can be found in ________ physical states: solid, ________, and gas. The tendency of water molecules to stick together is called ________, which contributes to the phenomenon of ________, allowing small objects to rest on its surface. When water molecules are attracted to other materials, this is called ________.

• compound, 2, 1, polar, hydrogen, universal, three, liquid, cohesion, surface tension, adhesion

• element, 3, 2, nonpolar, ionic, selective, two, gas, adhesion, viscosity, cohesion

• mixture, 1, 2, neutral, covalent, specific, four, solid, diffusion, capillarity, repulsion

• solution, 2, 2, ionic, metallic, limited, three, plasma, repulsion, evaporation, attraction

Tags

NGSS.MS-PS1-4

NGSS.MS-PS1-1