Unit 2 Retake 6.6CE

What of the following is evidence of a chemical change? Select all that are correct.

• Production of a gas

• Change in thermal energy

• Formation of a precipitate

• Color change

Tags

NGSS.MS-PS1-2

Which observations gathered during several lab experiment shows evidence indicates that a chemical change occurred?

• Melting an ice cube changes a solid to a liquid.

• Cutting paper using scissors changes a single piece of paper into multiple pieces.

• When mixing a red liquid and a clear liquid, a bright blue liquid is produced.

Tags

NGSS.MS-PS1-2

An apple slice is left on the kitchen counter and turns brown.

• Physical Change

• Chemical Change

Tags

NGSS.MS-PS1-2

Red food coloring is added to room-temperature water. The water turns red.

• Physical Change

• Chemical Change

Tags

NGSS.MS-PS1-2

Properties can be used to.....

• identify elements from each other

• alphabetize the periodic table

• conduct electricity

• sink or float

Which type of elements are found in the upper floating row on the periodic table?

• Nonmetals

• Metals

• Metalloids

• Rare Earth

Which of the following are known as semiconductors?

• Metalloids

• Metals

• Nonmetals

• Rare Earth

What is Luster?

• ability to reflect light (shiny or dull)

• ability to conduct thermal and/or electrical energy

• ability to be hammered into thin sheets

• ability for an element to sink or float in water

Which type of elements are found to the left of the zigzag on the periodic table?

• Nonmetals

• Metals

• Metalloids

• Rare Earth

What is conductivity?

• ability to conduct thermal or electrical energy

• ability to reflect light

• ability to interact with a magnet

• ability to be pulled into a wire

Tags

NGSS.MS-PS3-3