Physical & Chemical Properties & Changes

Which of the following is an example of a chemical change?

• cloud forming

• sugar dissolving

• water freezing

• candle burning

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Physical and chemical properties can be used to classify substances. Which of these shows a chemical property?

• Silver melts.

• Magnesium burns.

• Sulfur is a yellow solid.

• Aluminum conducts heat.

Tags

NGSS.MS-PS1-5

Which statement BEST describes what happens when a nail rusts?

• The mass of the nail is equal to the mass of the rust.

• The mass of the rust is equal to one-half the mass of the nail.

• The mass of the nail is equal to the mass of the rust and the combined oxygen.

• The mass of the rust is equal to the mass of the nail and the combined oxygen.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which is a way that a piece of paper can go through a chemical change?

• fold the paper in half

• soak the paper in water

• burn the paper with fire

• cut the paper with scissors

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Campers burned logs in a campfire.

How would the campers know that a chemical change has taken place?

• The logs changed shape.

• The rocks glowed when heated.

• The wood became a different substance.

• The ground absorbed heat from the coals.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Which change makes a new material?

• molding a clay figure

• breaking a drinking glass

• crushing ice cubes

• cooking eggs on a stove

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

A type of cold pack has two separate sections inside. One section contains a liquid and the other section contains a powder. When the cold pack is squeezed, the section that holds the liquid breaks. When the liquid combines with the powder, the pack becomes very cold. Which is the BEST explanation why the temperature of the pack decreases when the liquid and powder combine?

• A mixture forms.

• A solution forms.

• A chemical change occurs.

• Thermal energy is used

Tags

NGSS.MS-PS1-2

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Which action results in a chemical change?

• apples being cut into slices

• wood burning in a fireplace

• wet clothes drying on a clothesline

• snow being shoveled off of a sidewalk

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A chemical change happens when

• glass breaks into pieces.

• dough bakes in an oven.

• ice cream melts into a liquid.

• electricity flows through a wire.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which statement BEST describes the change to an ice cube as it melts?

• The change is physical because the mass remains the same.

• The change is physical because the substance remains the same.

• The change is chemical because water has a different pH than ice.

• The change is chemical because ice has a lower density than water.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4