23.24 Unit 2 Review

__________ properties are any characteristic of matter that CANNOT be observed or measured without changing the identify of the substance.

• Chemical
• Physical
• Structural
• Characteristic

Tags

NGSS.MS-PS1-5

__________ properties are any characteristic of matter that CAN be observed or measured without changing the identify of the substance.

• Chemical
• Physical
• Structural
• Characteristic

Look at the picture below. What clue or evidence observed in the picture above indicates that a chemical change is probably occurring?

• light was released
• the color changed
• the temperature changed
• bubbles were produced

Tags

NGSS.MS-PS1-2

Terry and Jean experimented with several items to see what would happen under different conditions. Below is the data they wrote at the conclusion of the experiment. Which substance changed CHEMICALLY under ALL 3 conditions?

• steel wool
• wood splinter
• paper
• copper wire

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A student mixes two clear solutions. Which of the following is evidence that a CHEMICAL REACTION is happening? (select ALL that apply) 1 - color change 2 - odor change/formation of gas (bubbles) 3 - colder temperature 4 - precipitate forms

• 2 and 3 only
• 1, 2, and 4 only
• 1, 2, 3, and 4
• 1 and 4 only

Tags

NGSS.MS-PS1-2

When a candle burns, the ___________________ is evidence of a physical change, while the ___________________ is evidence of a chemical change.

• light given off, wax melting
• light given off, smoke produced
• wax melting, wick getting shorter
• wax melting, light given off

Tags

NGSS.MS-PS1-2

What two types of matter are considered chemically pure substances?

• elements and compounds
• solutions and mixtures
• solutions and compounds
• elements and mixtures

Tags

NGSS.MS-PS1-4

Is this mixture homogeneous or heterogeneous?

• Homogeneous
• Heterogeneous

Which arrangement correctly orders mixtures in terms of INCREASING particle size? (INCREASING: Smallest Particle Size to Largest Particle Size)

• colloid, suspension, solution
• suspension, colloid, solution
• solution, colloid, suspension
• solution, suspension, colloid

How would Carbon Tetrachloride (CCl4) be classified? This is one carbon chemically bonded to four chlorine atoms.

• element
• compound
• atom
• mixture

Tags

NGSS.MS-PS1-1