Homework 11: Physical Properties and Changes

Which statement below best describes the difference between physical and chemical properties?

• Physical properties are determined by touching an object and chemical properties are determined by smelling the object

• Physical properties can be observed only if the substance is a solid, and chemical properties can be observed only if the substance is a liquid

• Physical properties are observed without changing the substance, and chemical properties describe matter based on its ability to change into something new

• Physical properties describe matter based on its ability to change into something new, and chemical properties are observed without changing the substance

Which chemical has the LEAST solubility at 90 degrees Celsius?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-2

Label each as a physical or chemical change.

Groups:

(a) Physical Change

,

(b) Chemical Change

• Changes to the appearance, not the composition

• Foil cut into smaller pieces

• A solid forming when two liquids combine

• Iron chain rusting

• Sugar dissolving in water

• Melted butter becoming solid when placed in a refrigerator

• Fireworks exploding in the sky

• Rearrangement of atoms to create a new substance

• Toasting a marshmallow

Tags

NGSS.MS-PS1-2

According to the graph, at 0 degrees Celsius, which chemical has the greatest solubility?

• KClO₃

• NaNO₃

• KNO₃

• NaCl

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

SELECT ALL THE CORRECT ANSWERS. Observe this fork, which is made of an element. Which properties can be used to identify the element that made the fork?

• The density of the fork is about 10.5 g/cm³

• The mass of the fork is 60 grams

• The melting point of the fork is about 960 degrees Celsius

• The texture of the fork is smooth

Tags

NGSS.MS-PS1-1

Match the following

• the ability of a substance to dissolve

• solute

• the substance doing the dissolving

• solubility

• the substance being dissolved

• solvent

• homogeneous mixture

• solution

Ability to rust is this type of property:

• Physical property
• Chemical property

Tags

NGSS.MS-PS1-2

Fluorine would have properties most like​ (a)  

• iodine

• potassium

• oxygen

• neon