Physical and Chemical Changes

Which of the following is NOT an example of a chemical change?

• Burning a piece of paper

• Mixing vinegar and baking soda to produce bubbles

• Dissolving sugar in water

• Rust forming on a metal surface

Tags

NGSS.MS-PS1-2

Which of the following is NOT an example of a chemical change?

• Baking a cake in the oven

• Digesting food in the stomach

• Freezing water into ice

• Lighting a match to create a flame

Tags

NGSS.MS-PS1-2

Which of the following is NOT an example of a physical change?

• Shredding a piece of paper

• Boiling water to make steam

• Breaking a glass bottle

• Burning a piece of wood

Which of the following best describes the main difference between chemical and physical changes?

• Physical changes always result in the formation of a solid, while chemical changes never lead to solid formation.

• Physical changes can involve a change in state, but chemical changes cannot involve a change in state.

• Chemical changes always change a substance’s chemical makeup, whereas physical changes do not affect its chemical makeup.

• Physical changes do not result in a change in mass, while chemical changes sometimes result in mass changes.

Tags

NGSS.MS-PS1-4

A student claims that salt mixed with water is a chemical change.

Is this true or false?

• True

• False

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

One paper is folded into a paper airplane. Another paper is torn in half. Which of the following statements is true?

• The papers went through a chemical change because the papers changed shape.

• The papers went through a physical change because the papers changed shape.

• The papers went through a physical change because a new substance was produced.

• The papers went through chemical changes because a new substance was produced.

Which of the following explains physical change of liquid water to solid ice?

• Ice forms because heat is added, causing the particles in the ice to move faster. This changes the color of the water form clear to white.

• Ice forms because heat is removed, causing the particles that make up the ice to move faster. This makes the ice change shape.

• Ice forms because heat is removed, causing the particles that make up the ice to move slower. This changes the water from a liquid to a solid.

• Ice forms because heat is added, causing the particles to move slower. This changes the water from a liquid to a solid.

Tags

NGSS.MS-PS1-4

A student is investigating physical and chemical changes in different substances.
Which investigation would provide evidence of a chemical change and why?

• Boiling a liquid to turn it into gas would provide evidence of a chemical change because the liquid changes state.

• Crushing a rock into smaller pieces would provide evidence of a chemical change because the rock is broken into parts.

• Heating a metal would provide evidence of a chemical change because the metal changes shape and appearance.

• Mixing two powders that produce a color change and release gas would provide evidence of a chemical change because a new substance with different properties is formed.

Tags

NGSS.MS-PS1-2

Which of the following is a physical change?

• Oxidizing

• Melting

• Decomposing

• Rusting

Which of the following is true for a chemical change?

• A phase change

• Evaporating

• A new substance is formed

• Liquid water becomes water vapor

Tags

NGSS.MS-PS1-2