Unit 1-3 Rewind

Categorize the following chemical formulas/Symbols.

Groups:

(a) Compound

,

(b) Element

• C

• N₂

• H₂O

• CO₂

• O₂

• CH₄

Tags

NGSS.MS-PS1-1

Identify the number of atoms of each element in the chemical formula C₆H₁₂O₆.

Carbon​ ​ (a)  

Hydrogen​ (b)  

Oxygen ​ (c)  

Total Atoms​ (d)  

• 1

• 2

• 3

• 6
• 12
• 8
• 4
• 24
• 36
• 18

Tags

NGSS.MS-PS1-1

Categorize the following as a physical or chemical change.

Groups:

(a) Chemical Change

,

(b) Physical Change

• Fireworks

• Boiling water

• Melting ice

• Baking a cake

• Burning wood

• Shredding paper

• Chopping wood

• Frying an egg

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the solvent in a saltwater solution?

• Water

• Salt

• Both water and salt

• Neither water nor salt

Tags

TEKS.SCI.7.6D

DOK Level 1: Recall

Compare and contrast elements and compounds in terms of their chemical symbols and formulas.

• Elements have one type of atom and a single chemical symbol, while compounds have two or more types of atoms and a chemical formula.

• Elements have two or more types of atoms and a chemical formula, while compounds have one type of atom and a single chemical symbol.

• Both elements and compounds have the same type of atoms and chemical symbols.

• Elements and compounds cannot be distinguished by their chemical symbols and formulas.

Tags

DOK Level 2: Skill/Concept

TEKS.SCI.7.6A

Select all points that represent the solute in the solution.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

There are​ ​ (a)   total atoms in the chemical formula Fe₂(SO₄)₃.

• 17
• 2
• 7
• 12

Tags

NGSS.MS-PS1-1

Explain why burning wood is considered a chemical change.

• Because it changes the state of matter from solid to gas.

• Because it produces new substances with different properties.

• Because it can be reversed by cooling.

• Because it only changes the appearance of the wood.

Tags

DOK Level 2: Skill/Concept

TEKS.SCI.7.6C

If you were to make lemonade and, after tasting it, realized it was too sweet. What do you do next?

• Dilute the solution by adding more solute

• Raise the concentration by adding more solvent

• Dilute the solution by adding more solvent.

• Raise the concentration by adding more solute.

Tags

DOK Level 2: Skill/Concept

TEKS.SCI.7.6D

Identify the number of hydrogen and oxygen atoms in the chemical formula H₂O₂ and explain their significance.

• 1 hydrogen atom and 2 oxygen atoms; it is a simple molecule.

• 2 hydrogen atoms and 2 oxygen atoms; it is a compound with equal numbers of hydrogen and oxygen atoms.

• 2 hydrogen atoms and 1 oxygen atom; it is a compound with more hydrogen than oxygen.

• 1 hydrogen atom and 1 oxygen atom; it is a simple molecule.

Tags

DOK Level 3: Strategic Thinking

TEKS.SCI.7.6B