Evaluate SC.4.P.9.1

Substances can change in different ways.  Sometimes they produce new substances.  Which of the following is an example of matter undergoing a chemical change?

• an ice cube melting

• an eraser being used

• a pencil snapping in two

• a cake baking in the oven

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Jessica takes care of her house and yard by doing chores such as raking the leaves, weeding the flower beds, and taking out the garbage.  She places all the plant and animal waste she collects in a metal bin outside her house.  The picture below shows where she puts the waste materials.

How is the object in the picture an example of a place where chemical changes occur?

• The waste materials change their mass.

• The waste materials change into new substances.

• The waste materials have changed their physical property of shape.

• The waste materials change into substances with the same physical properties.

Tags

NGSS.MS-LS2-3

Valeria places an ice cube on a plate.  The ice cube changes from a solid to a liquid.  What happens to the amount of matter as the ice cube melts? 

• It triples.

• It doubles.

• It stays the same.

• It decreases slightly.

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-4

Alex blows up a new balloon and then lets the air out.  He examines the change he causes to the balloon.  His balloon is shown below.

Which of the following best describes the change in the balloon?   

• It is a chemical change because it results in new materials with different characteristics.

• It is a physical change because it results in new materials with different characteristics.

• It is a chemical change because the balloon only changes shape.

• It is a physical change because the balloon only changes shape.

Holly is given a list of matter undergoing changes.  She is to classify these changes in matter into two categories.  The table she makes is shown below.

Where has Holly made an error in the way she has classified the changes?

• the puddle of water is evaporating

• a piece of wood is chopped up

• an apple decaying

• a wire being bent

Tags

NGSS.MS-PS1-2