Chemical Changes - TEST REVIEW 2018

Which of these situations most clearly demonstrates a chemical change?

• Observing water evaporate on a hot surface

• Describing the texture of two different rocks

• Calculating the density of an unknown substance

• Observing Gas Bubbles forming unknown substances combine!

Tags

NGSS.MS-PS1-2

All of the following are evidence of a chemical change EXCEPT –

• production of a gas

• production of a precipitate

• a new substance formed

• a decrease in size

Tags

NGSS.MS-PS1-2

Which of the following is NOT a chemical change?

• An ice cube melting

• an egg frying

• a nail rusting

• a match burning

Tags

NGSS.MS-PS1-2

Which of the following characteristics is shared by all chemical changes?

• Produce a precipitate

• Show a color change

• Release heat energy

• Form new substance!

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A bicycle was left outside for several days. What most likely happened to the bicycle?

• physical changes colored it green

• chemical changes colored it reddish-brown - (rusty)

• physical changes made it shiney

• No changes have occurred

Tags

NGSS.MS-PS1-2

What occurs if you mix LEMON JUICE and MILK together?

• A chemical change that produces a precipitate

• A physical change that creates a new substance

• A physical combination that produces a solid

• A corrosive reaction between two liquids

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following indicates a chemical change in an apple?

• Cutting an apple into six slices

• The apple Rotting and changing color

• Placing apple slices in a bag

• Removing the skin of the apple with a peeler

Tags

NGSS.MS-PS1-2

Bubbles and fizzing can be seen instantly when baking soda is mixed with vinegar. The bubbles are evidence of which of the following?

• A gas is formed when baking soda and vinegar are mixed

• Baking soda dissolves in vinegar when they are mixed.

• Vinegar turns into alcohol when it is mixed with baking soda

• A precipitate is formed when baking soda and vinegar are mixed

Tags

NGSS.MS-PS1-2

When two substances are mixed, they might form a new substance. Which of the following would indicate that a new substance has been formed?

• The temperature of the mixture decreases

• The volume of the mixture increases

• The mass of the mixture increases

• One of the substances dissolves

Tags

NGSS.MS-PS1-2

A granular substance is added to a liquid. Which of the following would provide evidence to suggest a chemical change has taken place?

• The liquid gives off heat

• The granules dissolve completely

• The volume of the liquid increases

• The granules seem to get smaller

Tags

NGSS.MS-PS1-2