DOL - 7.6 (C) - STAAR Review

Match the following scenarios with the type of change they illustrate.

(1) - Chemical Change​ (a)   ​ (b)   ​ (c)  

(2) - Physical Change​ (d)  

• A nail rusting over time
• milk souring
• a piece of paper burning
• water evaporating from a puddle
• Tables
• Lamps
• Bill
• something happening

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

A student observes that a piece of metal has turned reddish-brown after being left outside for several weeks. What type of change has occurred?

• Physical change

• Chemical change

• No change

• Both physical and chemical change

Tags

TEKS.SCI.7.6C

DOK Level 3: Strategic Thinking

Explain why dissolving sugar in water is considered a physical change.

• Because it produces a new substance

• Because it is irreversible

• Because the sugar can be recovered by evaporating the water

• Because it changes the chemical composition of sugar

Tags

TEKS.SCI.7.6C

DOK Level 3: Strategic Thinking

A student mixes vinegar and baking soda, resulting in bubbling and the production of gas. What type of change is this and why?

• Physical change, because it involves mixing

• Chemical change, because a gas is produced

• Physical change, because it is reversible

• Chemical change, because it involves a change in state

Tags

TEKS.SCI.7.6C

DOK Level 3: Strategic Thinking

Describe a real-life scenario where a chemical change is beneficial.

• Freezing water to make ice

• Dissolving salt in water for cooking

• Photosynthesis in plants to produce oxygen

• Melting wax to make candles

Tags

TEKS.SCI.7.6C

DOK Level 3: Strategic Thinking

Analyze the process of cooking food and identify which parts involve physical changes and which involve chemical changes.

• Physical: Cutting vegetables; Chemical: Boiling water

• Physical: Melting butter; Chemical: Browning meat

• Physical: Mixing ingredients; Chemical: Freezing water

• Physical: Heating oil; Chemical: Dissolving salt

Tags

TEKS.SCI.7.6C

DOK Level 4: Extended Thinking