Unit 1 6.5A & 6.5C

The chemical symbol Ca represents —

• chlorine

• cesium

• carbon

• calcium

Flour, sugar, cocoa, oil, and eggs are mixed together and placed in the oven to make brownies.

When the brownies are removed from the oven, they no longer look like the original ingredients.

Which of the following describes why the ingredients changed?

• A biological change occurred.

• No change occurred.

• A physical change occurred.

• A chemical change occurred.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What do the letters Na and Cl represent in the chemical formula NaCl?

• Mixtures

• Compounds

• Elements

• Molecules

Tags

NGSS.MS-PS1-1

A student had a beaker with a small amount of baking soda. The student added a few drops of

pickle juice to the baking soda and observed fizzing and bubbling.

Based on observation, which of these can the student conclude?

• A chemical reaction produced a gas.

• Only a physical change happened.

• No chemical reaction took place.

• A chemical reaction produced a solid.

Tags

NGSS.MS-PS1-2

How many different elements make up this compound?

• 8

• 7

• 6

• 32

Tags

NGSS.MS-PS1-1

Which students’ observations indicate that a new substance formed as a chemical change

occurred?

• Student A and Student C

• Student B and Student D

• Student B and Student C

• Student A and Student D

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Which of the following substances is an element?

• CO2

• KF

• NaS

• Co

Which of the following statements are characteristics of a compound?

• I, II, IV

• I, IV

• I, III

• II, III, IV

Tags

NGSS.MS-PS1-1

Which of the following substances represents a compound?

• 2, 3, 5, and 6

• 2 and 6

• 1 and 4

• 1, 2, 3 and 4

Tags

NGSS.MS-PS1-1

Which of the following models represents compounds?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1