Chemical and Physical Changes and Properties of Matter Review

The graduated cylinder shown to the right contains three liquids labeled 1, 2 and 3. The objects (A, B, and C) in the cylinder are made from three different substances. Which of the following statements is true?

• Liquid 2 is more dense than liquid 3

• Liquid 3 is more dense than liquid 1

• Object A is more dense than liquid 3

• Object C is less dense than liquid 2

Tags

NGSS.MS-PS1-2

Which best describes physical and chemical changes?

• In a physical change, the matter looks different but it is still the same substance; in a chemical change the original matter changes into a different substance with different properties.

• In a physical change, the original matter changes into a different substance with different properties; in a chemical change the matter looks different but it is still the same substance.

• In both physical and chemical changes, the matter looks different, but it is still the same substance.

• In both physical and chemical changes, the original matter changes into a different substance with different properties.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

Which of the following is evidence of a chemical change?

• change in size

• change in color

• change in state

• all of the above

Tags

NGSS.MS-PS1-2

A student is given a sample of an unknown substance. Which of these pieces of information identifies a chemical property of the substance?

• It burns easily

• It has a density of 1.0 g/mL

• It has a mass of 10 grams

• It has an odor similar to rotten eggs

A change in matter that makes a new substance is called:

• A mixture

• A physical change

• A chemical change

• Sublimation

Tags

NGSS.MS-PS1-2

A chemist who studies water samples did a demonstration of how to test for lead in water. She added a clear solution of potassium iodide to a clear solution of lead nitrate. Then a yellow swirling solid formed in the liquid.What is most likely true about the yellow solid?

• homogeneous mixture

• precipitate

• solution

• element

Tags

NGSS.MS-PS1-2

The temperature at which a solid becomes a liquid is called:

• boiling point

• condenstation

• melting point

• sublimation

Tags

NGSS.MS-PS1-4

Which of the following is a physical property of matter?

• texture

• melting point

• density

• all the above

Which of the following is a chemical property of matter?

• density

• size

• shape

• flammability (ability to burn)

Ice is less dense than water due to the fact that matters density changes when it changes states . (Hint: Ice in a glass of water)

• true

• false

Tags

NGSS.MS-PS1-4