Chemical & Physical Changes Olympic Game (5th)

The mass of a solid object stays the same until

• it is put into orbit in space

• it changes volume by expanding or contracting

• matter is added or taken away from the object

• the object is taken to another planet where the force of the gravity is different.

Vinegar is an acid that bubbles when it interacts with calcite. Which mineral contains calcite?

• limestone

• sandstone

• granite

• gneiss

Tags

NGSS.MS-PS1-2

Mark is observing a burning candle. He notices that the candle wax makes a pool and dribbles down the side of the candle, where it hardens again. The candle wax has undergone

• a physical change

• a chemical change

• a physical and a chemical change

• the formation of a new substance

Tags

NGSS.MS-PS1-4

David added a little baking soda to a beaker that contained vinegar. Bubbles started coming from the mixture as a gas was released. The gas was evidence that

• the mixture was starting to boil

• the air in the flask contracted

• a chemical reaction took place

• the vinegar and baking soda expanded

Tags

NGSS.MS-PS1-2

A different chemical substance is formed when

• a cloth is cut

• a cup breaks

• a piece of paper burns

• a piece of chalk falls apart

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of these statements about a change of state is correct?

• ice changes to water vapor when heat is removed

• ice changes to liquid water when heat is removed

• liquid water changes to water vapor when heat is added

• water vapor changes to liquid water when heat is added

Tags

NGSS.MS-PS1-4

Which of the following is an example of MELTING?

• stirring some sugar in water until you cannot see the sugar

• heating a pan of water until all the water is gone

• heating a block of ice until the ice turns to water

• cooling water in the freezer until it becomes a solid

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

An example of a liquid turning into a gas is

• a chocolate bar melting

• an ice cream cone dripping

• a stick of butter getting warm

• steam escaping from a cup of hot chocolate

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NGSS.MS-PS1-4

Pancakes are made from liquid batter. After the pancakes are cooked, they are considered

• a mixture and the ingredients can still be separated

• a mixture and the ingredients cannot be separated

• not a mixture because the ingredients cannot be separated

• not a mixture because they don’t have syrup

If you dissolved a lot of salt in some water in a large flat dish and put the dish in bright sunlight on a hot day, what would be left in the dish after a long time?

• dry salt

• water with no salt

• the same salty water as before

• nothing

Tags

NGSS.MS-PS1-4

NGSS.MS-ESS2-4