Chalk Lab

In this lab, what represents sediments at the beginning of the rock cycle?

• Whole crayons, chalk, and clay

• Melted crayons

• Crushed or cut pieces of crayon, chalk, and clay

• Pressed pieces of aluminum foil

Tags

NGSS.MS-ESS2-1

How is sedimentary rock modeled in this activity?

• By melting the materials

• By pressing the sediments together between foil

• By cutting the materials into smaller pieces

• By warming the materials in your hands

During a lab investigation, students followed this procedure: 1. Measure the mass and length of a piece of chalk. 2. Place the piece of chalk in a small beaker. 3. Cover the chalk with vinegar. 4. Record observations. Students observed bubbles immediately forming around the chalk.  After the bubbles stopped forming, the students noticed that the chalk was smaller.  Some students tried to recover the missing chalk from the vinegar, but no chalk particles were visible.

Tags

NGSS.MS-PS1-2

In a chalk lab experiment, what is the primary component of chalk that reacts with vinegar?

• Calcium carbonate

• Sodium chloride

• Silicon dioxide

• Magnesium sulfate

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What type of reaction occurs when chalk is placed in vinegar?

• Combustion

• Neutralization

• Decomposition

• Precipitation

Tags

NGSS.MS-PS1-2

Which gas is released when chalk reacts with vinegar in a lab experiment?

• Oxygen

• Carbon dioxide

• Hydrogen

• Nitrogen

Tags

NGSS.MS-PS1-2

In a chalk lab, what is the purpose of measuring the mass of chalk before and after the experiment?

• To determine the density of chalk

• To calculate the volume of vinegar used

• To measure the amount of gas produced

• To observe the mass change due to reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the chemical formula for the main component of chalk used in lab experiments?

Tags

NGSS.MS-PS1-1

During a chalk lab, students observe bubbles forming around the chalk. What does this indicate?

• A physical change is occurring

• A gas is being released

• The chalk is dissolving

• The temperature is increasing

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In a chalk lab, why is it important to use a small beaker for the reaction with vinegar?

• To increase the reaction rate

• To prevent the loss of gas

• To ensure complete submersion of chalk

• To measure temperature changes accurately