Properties of Matter: SC.5.P.8.3

Front

George's science teacher has a mixture of table salt and iron filings.
Which of the following would be the best way to separate the salt and the iron filings? A.  use a magnet to pull the iron filings from the salt, add food coloring to the mixture to make the salt change color, pour them into a beaker of water and see if the iron filings float, heat up the mixture to see if the salt or the iron filings will burn away

Back

use a magnet to pull the iron filings from the salt

Front

Carrie has a container that contains thousands of mixed glass beads and iron beads of different shapes and sizes.
Which of the following is the best way to separate them?

Back

The iron beads are magnetic, so she could separate the glass from the iron with a strong magnet.

Front

Imagine you have a bucket of saltwater.
Which of the following would be the best way to remove the water so that you're left with only salt? Stir the saltwater for a long time. The salt will form a crystal., Leave the saltwater to sit for a long time. The salt will settle to the bottom, Boil the saltwater. The water will evaporate and only the salt will remain, Freeze the saltwater. The water will sink to the bottom and the salt will rise to the top

Back

Boil the saltwater. The water will evaporate and only the salt will remain.

Front

If Abdul stirs his tea, what effect does it have on the rate at which the sugar cube dissolves?

Back

The rate that the sugar cube dissolves will speed up.

Front

Which of the following solids will not dissolve in boiling water? (baking soda, sand, sugar, table salt)

Back

sand

Front

Imagine that you have four buckets full of dark, muddy water. One bucket is frozen, one bucket is boiled, one bucket is shaken up, and one bucket is passed through a paper filter.
Which bucket is most likely to become lighter in color?

Back

The filtered bucket, because larger particles of dirt were strained out

Front

Imagine a thick 10 kilogram block of soap and a thin 10 kilogram sheet of soap. Which answer correctly explains which will dissolve first when they are both placed underwater?

Back

The block will dissolve first because it is less spread out than the sheet.

Front

Kayla wants to know if a sugar cube in a bowl of water will dissolve more quickly if it is stirred with a spoon than if it is left alone. Which answer explains the effect that stirring will have?

Back

The sugar will dissolve more slowly because the movement of the water makes it stick together.

Front

Whose sugar is most likely to dissolve the fastest, and whose is slowest?
Sam drops a sugar cube weighing one gram in a cup of cold water and lets it sit until the sugar cube dissolves.
Malcolm adds one gram of powdered sugar to a cup of hot water and stirs it with a spoon.
Rosa adds a one-gram packet of sugar granules to a cup of cold water and stirs it with a spoon. Angela adds a sugar crystal weighing one gram to a cup of hot water and does not stir it.

Back

Angela's sugar dissolves fastest, and Rosa's dissolves slowest.