6.6E- Chemical Changes

Liam and Aria are having a debate: Is burning wood a chemical or physical change? Help them settle this by choosing the correct option!

• chemical

• physical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Mia and Rohan are in a science class. Mia asks, "Hey Rohan, do you think glass breaking is a (a)   change?"

• chemical

• physical

Evelyn and Kai found an old bicycle in the backyard. Is the rusting bicycle a chemical or physical change?

• chemical

• physical

Tags

NGSS.MS-PS1-2

Zoe and Liam are building a treehouse! Hammering wood together to create their masterpiece is a (a)   change.

• chemical

• physical

Nora and Mia are conducting a science experiment. Which of the following examples shows that a chemical reaction has occurred? 

• A rock breaks into smaller pieces when it is struck with a hammer.

• Rust forms on a hammer that has been left outside too long. 

• A cup of water turns pink when a few drops of red food coloring are added. 

• A solid is formed when heat is removed from a sample of water. 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following examples shows that a chemical reaction has occurred? 

• A rock breaks into smaller pieces when it is struck with a hammer.
• Rust forms on a hammer that has been left outside to long. 
• A cup of water turns pink when a few drops of red food coloring are added. 
• A solid is formed when heat is removed from a sample of water. 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Hydrogen peroxide breaks down to form water and oxygen gas. Which observation is evidence that a chemical reaction has occurred?

• The mass of the solution remains the same.
•  Phase changes are observed.
•  The color of the solution remains clear.
• The temperature of the solution increases. 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

A clear liquid from a flask is poured into another clear liquid in a beaker. Which of the following results of this procedure would indicate a new substance was formed?

• The level of the substance in the beaker is higher after the other liquid is added.
• A yellow solid forms and then settles to the bottom of the beaker.
• Small white crystals are left behind in the flask that held the first liquid.

Tags

NGSS.MS-PS1-2

During a fun science experiment, Kai, Arjun, and Samuel are observing different scenarios. Which of the following shows clear evidence of a chemical reaction taking place?

• A sample of zinc is placed in water and it settles to the bottom

• A solid block of ice is heated and it completely melts into a liquid. 

• Sugar that is burned gives off an odor and turns brown and then black.

• A tomato is placed into a blender and chopped up into smaller pieces.

Tags

NGSS.MS-PS1-2

Nora and Emma are in the lab, and they notice something fascinating! Evidence of a chemical reaction is anything that shows - 

• a new substance has formed

• a solid dissolved in a liquid

• interaction between 2 gases

• a change in the state of matter

Tags

NGSS.MS-PS1-2