Structure and Properties of Matter

Which diagram is showing a compound?

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Tags

NGSS.MS-PS1-1

A student is planning an investigation to explore different properties of matter.

Which investigation will help the student explore a physical property of matter?

• investigation: Add a small amount of solid to a liquid in a beaker.

  observation: The solid dissolves in the liquid

• investigation: Place a solid in a beaker and add a small amount of liquid.

  observation: The beaker becomes warm to the touch.

• investigation: Add a small amount of solid to a liquid in a beaker.

  observation: The solution starts to fizz and overflows the container

• investigation: Place a solid in a beaker and add a small amount of liquid.

  observation: Bubbles form on the top of the solid.

Which diagram is showing a pure substance?

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Tags

NGSS.MS-PS1-1

A student is shown a simple model of particles that make up a liquid, as shown in the diagram.

How should the model be changed to show the particles of a solid?.

• Decrease the velocities of the particles, and decrease the space between the particles.

• Decrease the velocities of the particles, and increase the space between the particles.

• . Increase the velocities of the particles, and decrease the space between the particles

• Increase the velocities of the particles, and increase the space between the particles.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A student is shown a simple model of particles that make up a liquid, as shown in the diagram.

How should the model be changed to show the particles of a liquid at a higher temperature?

• Increase the velocities of the particles, but maintain the same space between the particles.

• Separate the particles into positive and negative charges, and increase the space between the particles.

• Separate the particles into positive and negative charges, but maintain the same space between the particles.

• Decrease the velocities of the particles, and decrease the space between the particles

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which diagram could be separated physically?

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Which diagram is showing a heterogeneous mixture?

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Iron can be found as a gray powder and sulfur can be found as a yellow powder. A student is shown The models of two substances made of iron (Fe) and sulfur (S).

The student is asked to classify each substance as a mixture or a pure substance and describe how it would appear Which classification and description of the models is correct?

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Tags

NGSS.MS-PS1-1

A student is asked to conduct an investigation that will determine a physical property of a cubeshaped solid block of salt sample.

Which procedure BEST measures a physical property of the sample?

• 1. Use a ruler to measure the length of one side of the sample. 2. Record this value to the nearest millimeter.

  3. Cube the value in step 2.

  4. Place the cubed sample on the digital balance.

  5. Record this value to the nearest tenth of a gram.

  6. Divide the value in step 5 by the value in step 3

• 1. Cut away two different-sized pieces of the sample and place into a container on a hot plate.

  2. Place two thermometers in the containers, one touching each sample.

  3. Record the time it takes the temperature of the smaller sample to increase 1°C.

  4. Continue to heat the sample.

  5. Record the time it takes the temperature of the larger sample to increase 1°C.

  6. Subtract the value in step 3 from the value in step 5.

• 1. Measure 10 mL of vinegar (acetic acid) in a graduated cylinder.

  2. Pour the acetic acid into a beaker.

  3. Drop the sample into the beaker of acetic acid to determine what happens to the sample.

  4. Record your observations.

• 1. Gently break the solid sample into smaller pieces using a hammer.

  2. Use long-handled forceps to pick up one of the small sample pieces.

  3. Hold the small sample piece in the flame of a Bunsen burner for a few seconds to determine what happens to the sample.

  4. Record your observations