Challenge 5: Matter

Patricia and Ken are comparing two substances. They make a table of the properties for reach of the samples. Which substance in the table is most likely a gas?

• Substance 1

• Substance 2

• Substance 3

• Substance 1 & 2

Tags

NGSS.MS-PS1-2

The two objects shown are the same size. However, one object is made of wood, and the other object is made of plastic. Which of the following properties of the objects will be the same?

• mass

• texture

• volume

• weight

Dan brought some chocolate chips in a plastic container with his lunch one day. He decided to save them and eat them while he waited for the bus after school. All afternoon his lunch bag sat on the warm windowsill in his classroom. When he finally took the container out after school, the chocolate chips had turned into a hard chunk of chocolate shaped like the bottom of the container. What happened to his chocolate chips?

• They started as a solid, melted, and then became a solid again.

• They changed from a solid to a gas before becoming solid once again.

• They were a cool solid to start, then became a warm solid before cooling again.

• They went from being a hard solid to a gas, a liquid, and then to a hard solid again.

Tags

NGSS.MS-PS1-4

If two objects balance like the one shown on the picture, what must be true?

• Object A has more mass than object B.

• Both objects have the same mass.

• Object A has more volume than object B

• Both objects have the same volume

Tags

NGSS.MS-PS2-4

Nathan went swimming at the lake over the weekend. While he was playing on the shore, he found a small chunk of cement and a stick, which appeared to be the same size. What would be the best way for Nathan to compare the volume of the stick and of the chunk of cement?

• Throw them in the lake and see which one will sink.

• Use a ruler to measure the length of each of the objects.

• Place them each on a scale and see which one weights more.

• Place them in a bucket of water and see which one raises the water level the most.

Both cookies and gelatin desserts are solids although their textures are very different. What do they have in common that makes them solids?

• They both keep their own shape.

• They both can move around in a container.

• They both are made of solids such as sugar.

• They both may be eaten.

The same amount of sugar crystals were placed in the two cups of water seen in the picture. Which statement best describes the differences seen in the cups?

• Sugar crystals take longer to dissolve in cold water.

• The sugar crystals placed in the hot water were probably smaller than those placed in the cold water.

• Sugar crystals do not dissolve in water.

• Sugar crystals take longer to dissolve in hot water.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

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?

• 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.

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.

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Abdul uses sugar cubes to sweeten his tea. He wonders whether stirring his tea will make the sugar cube dissolve faster or slower. If Abdul stirs his tea, what effect does it have on the rate at which the sugar cube dissolves?

• The rate that the sugar cube dissolves will speed up.

• The rate that the sugar cube dissolves will slow down.

• The rate that the sugar cube dissolves will remain the same.

• The rate that the sugar cube dissolves will slow down and then stop.

Tags

NGSS.MS-PS3-1