Signs of Chemical Reactions

Can you now list the 5 signs of the chemical reaction?

• Yes I can list the 5 signs

• Yes I can list 4 signs

• Yes I can list 3 signs

• Yes I can list 2 signs

• No,I can't list any sign

Tags

NGSS.MS-PS1-5

Signs of a chemical change could be:

• a change in energy (temperature, light, sound)

• a precipitate forms (a solid forms from 2 liquids)

• formation of gas (bubbles)

• shocking change in color

• all of these answers are signs of chemical change

Tags

NGSS.MS-PS1-2

This image shows a

• chemical reaction

• physical change

• musical change

• all of these answers are correct

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

NGSS.MS-PS1-1

When energy like heat and light are given off in a chemical reaction it is called

• exothermic

• endothermic

• eccentric

• ectomorphic

Which of the following are signs of a chemical reaction?

• Formation of a gas

• A change in temperature

• A change in color

• A change in size

Tags

NGSS.MS-PS1-2

Which of these is NOT a sign of a chemical reaction?

• A phase change

• Formation of a precipitate

• A color change

• A temperature change

Tags

NGSS.MS-PS1-2

You have 2 chemicals, CHEMICAL A and CHEMICAL B. They are both liquids. When you combine them you notice some crystals starting to form within them. Did a chemical reaction occur?

• Yes

• No

Tags

NGSS.MS-PS1-2

When you combine baking soda and vinegar the reaction produces bubbles. Explain how you know that this is a chemical reaction.

Tags

NGSS.MS-PS1-2

You have a beaker full of water. If you add a solid substance to the beaker and the water level rises, is this a chemical reaction? Why or why not?

• Yes because it is a mixture now.

• No because there was no sign of a chemical reaction.

• Yes because the water moved.

• No because the temperature changed.

Tags

NGSS.MS-PS1-2

Which of the following is a sign of a chemical reaction?

• A change in temperature

• A change in shape

• A change in size

• A change in state

Tags

NGSS.MS-PS1-2