Matter-Physical & Chemical Changes

Ryan takes three small ice cubes and places them in a glass plate. He leaves them for an hour at the room temperature. Which of these would NOT change in the water after one hour?

• temperature

• mass

• shape

• physical state

Tags

NGSS.MS-PS1-4

Sam wants to demonstrate how water changes from a solid to a gas. He places ice in a pot on a stove. What variable is causing water to change state?

• the container the ice is placed in

• the temperature of the air surrounding the ice

• the heat from the stove

• the time that has lapsed since the ice was removed from the freezer

Tags

NGSS.MS-PS1-4

A solution is a mixture that looks exactly the same everywhere. These mixtures cannot be separated by a filter. Which of these could use a filter to separate the mixture?

• a mixture of rocks and soil

• a mixture of salt and water

• a mixture of sugar and water

• a mixture of juice and water

Which of these actions cause a PHYSICAL change?

• rusting of metal pipes

• burning a log

• cooking an egg

• crushing an aluminum can

Rusting metal is an example of a ____ change.

• chemical

• phase

• state

• physical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Salt water, a mixture, is made by dissolving salt in water. Mixtures like this can be separated by using the physical properties of the mixture. Which would be the best way to separate a mixture made of salt and water?

• evaporation

• chromotography

• magnetism

• filtering

Josh decided to mix some vinegar with baking soda. He knew that a reaction occurred because he made careful observations. He noted that the mixture started to foam up and bubble, and it was white in color. How did Josh know that a chemical reaction occurred?

He was sure a reaction occurred because of

• the color of the mixture

• the smell of the vinegar

• the volume of the mixture

• the formation of a gas

Tags

NGSS.MS-PS1-2

Which is an example of a chemical change?

• baking a cake

• ripping paper

• stretching a rubber band

• chopping wood

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Water is one of the most important things to you and to all living things. The fact that you can measure the volume of room temperature water with a beaker is a clue that room temperature water is in liquid form.

If you keep lowering the temperature of the water, it will eventually harden, taking on a definite shape. This means that the water has changed form, into a ___.

• plasma

• brick

• solid

• gas

Tags

NGSS.MS-PS1-4

What physical property would you use to separate these jelly beans?

• length

• mass

• color

• texture

Tags

NGSS.5-PS1-3