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Eighth Grade Science S8P1.d LP3.2

Last updated over 6 years ago

5 questions

Note from the author:

S8P1.d LP3.2

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Question 1

1.

Question 2

2.

Heidi goes to Costa Rica on vacation and comes back home to Georgia with a tan. Tanning is considered

A.  a chemical change. 

B.  a physical change 

C.  a chemical property. 

D.  a physical property. 

Question 3

3.

A. The atoms in the hydrochloric acid and baking soda combined, forming a product with a different state but the same properties. 

B. Adding the hydrochloric acid to the baking soda superheated the hydrochloric acid, causing it to change phases. 

C. The atoms in the hydrochloric acid and baking soda rearranged, forming products with different properties. 

Question 4

4.

Which of the following best indicates a chemical change?

A. the production of a gaseous substance 

B. a change in the volume of the reactants

C. a change in the mass of the reactants

D.  the production of a new substance 

Question 5

5.

What allows one to know that a chemical reaction has taken place when lead (II) nitrate and potassium iodide are mixed?

A.  A gas is formed. 

B.  A precipitate is formed. 

C.  Ionic compounds are the reactants 

D.  Ionic compounds are the products. 

A.

B.

C.

D.

D. Adding the hydrochloric acid to the baking soda superheated the baking soda, causing it to change phases. 