Unit 2 Review

Which experiment is an example of Solubility?

• Using a magnet to separate iron and sand.

• Mixing sugar and water until the sugar dissolves, then evaporating the water until the sugar is seen again

• Using a triple balance beam with various obvious objects and comparing them.

• Testing in a tub of water which items sink or float

Tags

NGSS.MS-PS1-2

Some items have accidentally fallen into a large fountain and need to be removed. These items include plastic bottles, metal bolts, and marbles.
Which of the following explains a useful method for removing some of these items?

• The metal bolts and marbles are less dense than water, so they can float to the top for easy removal.
  

• The plastic bottles are more dense than water, so they can be scooped from the bottom.

• The plastic bottles are less dense than water, so they can be collected from the surface.

• The marbles have the same density as water, so they will dissolve and not need removal.

A beaker contains 250 mL of a lemonade solution at 24°C, made by mixing lemon juice, sugar, and water. Students added several ice cubes and stirred until the ice melted.
Which two properties of the lemonade solution changed after the ice melted?
Select TWO correct answers.

• The flavor of the lemon juice

• The temperature of the solution.

• The volume of the solution

• The total amount of sugar in the solution.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What tool would be best for seperating this mixture?

• A Sieve

• A beaker and filter

• Tweezers

• Hot Plate

Provide one example of an object changing its state of matter.

Tags

NGSS.MS-PS1-4

A student observed multiple objects. What is one way they can seperate these objects into groups?

• By density with objects that float vs objects that sink

• By magnetism with objects that are magnetic vs objects that aren't

• By mass with objects that are above 5g vs objects that are below 5g

• By temperature with objects that are hot vs objects that are not hot

Tags

NGSS.MS-PS2-3

Which mixture DOES NOT change size after being mixed?

• Salt and Water

• Hot Cocoa and Milk

• Pebbles and Sand

• Koolaid and Water

Give me one example of a thermal conductor and a thermal insulator.

Tags

NGSS.MS-PS3-3

What is a physical change of property?

• Water turning into steam

• Pouring milk into cereal

• Mixing lettuce and tomatoes

• Seperating a bag of trail mix

What does soluble mean?

• The ability to float on water

• The ability to attract iron

• The ability to reach above boiling

• The ability to be dissolved