Common Assessment 1 Postview

Which of the following is correct?

• reactants ← products

• reactants products

• reactants → products

• reactants = products

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Plants perform a chemical reaction known as photosynthesis in which light energy is converted into chemical energy in the form of sugars. The chemical equation for photosynthesis is displayed.  Which statements accurately describe the chemical reaction process that plants undergo? Select TWO correct answers.

• No new substances are produced during the process of photosynthesis since it is a chemical reaction.

• There are more carbon (C) atoms on the products side of the equation than there are on the reactants side.

• A new substance is produced during photosynthesis because photosynthesis is a chemical reaction.

• There are fewer hydrogen (H) atoms on the products side of the equation than there are on the reactants side.

• The number of oxygen (O) atoms is the same on the reactants and products side of the chemical reaction.

Tags

NGSS.MS-LS1-6

NGSS.MS-PS1-5

A student creates a mixture of water and washing soda weighing 10 g and a mixture of water and epsom salts weighing 15 grams. He knows that when he mixes the two substances a chemical change will occur. According to the law of conservation of mass, what should the weight of the products be after he mixes them?

• 10g

• 15g

• 5g

• 25g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

This equation describes the chemical reaction that occurs during photosynthesis.

6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

 How many elements does C₆H₁₂O₆ contain?

• 3

• 6

• 12

• 24

Tags

NGSS.MS-PS1-1

The chemical formula for sulfuric acid is H₂SO₄.  Which of the following statements accurately describe the atoms involved in the formula for sulfuric acid? 

Select TWO correct answers.

• There are 4 sulfur (S) atoms involved in the chemical formula.

• There are twice as many hydrogen (H) atoms as there are sulfur (S) atoms.

• There are twice as many sulfur (S) atoms as there are hydrogen (H) atoms.

• There are twice as many oxygen (O) atoms as there are hydrogen (H) atoms.

• There are 6 total atoms involved in the chemical formula.

Tags

NGSS.MS-PS1-1

A group of students are describing the chemical formula displayed below. C3H7NO2

What information would accurately complete the statement? Move ONE correct answer to each box.​

There are ​ (a)   elements and ​ (b)   total atoms involved in the chemical formula displayed.

• 4
• 13
• 1
• 2
• 3
• 9
• 12
• 14

Tags

NGSS.MS-PS1-1

Use the chemical formula displayed below to complete the following statements by selecting the correct answers from the drop-down menus. H₃PO₄ In the chemical formula displayed above, there are ​​ (a)   different elements and ​ ​ (b)   total atoms. There are ​ (c)   more oxygen (O) atoms than there are phosphorus (P) atoms.

• 3
• 2
• 4
• 8
• 7
• 6

Tags

NGSS.MS-PS1-1

Select all the correct answers.

Robert and Veronica are creating examples of physical and chemical changes occurring in matter. Which of the following are examples of a physical change? Choose ALL correct answers by clicking the appropriate boxes. There will be more than one answer.

• 
• 
• 
• 
• 

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Drag and drop the correct choice to each blank.

Physical Changes include: tearing paper, breaking glass, and ​ (a)   .

Chemical changes include: burning wood in a fire, ​ (b)   , and boiling an egg.

• cutting an apple
• baking a cake

Tags

NGSS.MS-PS1-2

Which of the following kitchen activities are examples of a physical change?

Select THREE correct answers.

• 
• 
• 
• 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4