Physical Science - Chemistry Review

Yolanda filled a beaker with water and measured its temperature as 12°C.  She then added some solid CaCl₂ and stirred until it was completely dissolved.  After 10 minutes she read the final water temperature as 24°C.  The air temperature in the room was 26°C. 
Which of the following is a possible question Yolanda   is seeking to answer:

• Does air temperature in the room affect the water temperature?
• Does adding CaCl₂ to the water affect the temperature of the water?
• Does stirring affect the solubility of CaCl₂?
• Does time affect the solubility of CaCl₂?

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Which of the following would be most appropriate for   measuring the volume of a small, irregular solid?

• Flask
• Graduated Cylinder
• Evaporating Dish
• Balance Beam

The pictures below show the position of different elements on the periodic table. Which pricture has an X in the locations of the three elements that would be most similar in the way they react?

• A
• B
• C
• D

These pictures show the changes that occur as a solid becomes a gas. What is added to a substance to cause these changes?

• force
• elements
• molecules
• energy

Tags

NGSS.MS-PS1-4

Which of the following terms best describes steel?

• A
• B
• C
• D

Is grapefruit juice (pH=4.2) an acid or a base?

• Acid
• Base

Aluminum (Al) has three electrons in its outer shell. Oxygen (O) needs two electrons to complete its outer shell. What is the chemical formula for aluminum oxide?

• AlO
• AlO₂
• Al₂O
• Al₂O₃

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many protons and electrons are in a copper ion that has a charge of +2?

• 27 protons, 29 electrons
• 27 protons, 31 electrons
• 29 protons, 27 electrons
• 29 protons, 31 electrons

Tags

NGSS.HS-PS1-7

Which atom has a net positive charge?

• Atom W
• Atom X
• Atom Y
• Atom Z

Tags

NGSS.MS-PS1-1

Which of the following was joined by covalent bonding?

• PCl₃
• NaBr
• Li₂S
• MgCl₂

Tags

NGSS.MS-PS1-1