Cast Science

Leah records properties of the substances she mixed before and after the trials. Which property or properties show that a chemical reaction occurred?

• State of matter ONLY

• Mass

• Color ONLY

• Both state of matter and color

Tags

NGSS.MS-PS1-2

Leah made a model of the reaction between Iron and Copper Sulfate. However, it needs improvements. Which statement best describes which improvements need to be made?

• The mass of the reactants does not equal the mass of the products.

• The number of atoms for the reactants is different than the products

• The number of atoms for the reactants is the same as the products

• The composition of atoms for the reactants is different than the products

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

According to this model, what are the products made from the chemical reaction?

• Fe

• CuSO₄

• Cu

• FeSO₄

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Leah combined Fe and CuSO₄ and measured the masses before and after a reaction. What is the total mass of the reactants?

• 96 grams

• 25 grams

• 71 grams

• 192 grams

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Leah combined Fe and CuSO₄ and measured the masses before and after a reaction. What is TRUE about the total mass of the reactants and the total mass of the products?

• They are the same (96 grams)

• They are different

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Leah conducts an investigation by mixing Fe with CuSO₄ and makes a model to help explain why the total mass did not change. Leah's model can also be used to show that a chemical reaction occurred because the products

• are the same size as the reactants

• have the same composition as the reactants

• are at different states of matter compared to the reactants

• have differently arranged atoms compared to the reactants

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

According to this model, is the chemical reaction balanced?

• Yes

• No

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

According to this model, Fe, or Iron, is represented by

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1

How many atoms make up CuSO₄ ?

• 1

• 4

• 5

• 6

Tags

NGSS.MS-PS1-1

According to this "Key" that models atoms and molecules, the molecules are

• Fe and CuSO₄

• FeSO₄ and CuSO₄

• Fe and Cu

• Cu and CuSO₄

Tags

NGSS.MS-PS1-1