Chemical Reaction or Not

When you use a flame to lit a sparkler it produces bright sparks of light. Did a chemical reaction likely occur?

• Yes a chemical reaction likely occurred

• No a chemical reaction likely did not occur

Tags

NGSS.MS-PS1-2

Paper is ripped. Is this an example of a chemical reaction?

• Yes it is an example of a chemical reaction

• No this is not an example of a chemical reaction

Clothes slowly fade in colour after being left out in the sun for too long.

• Yes this is an example of a possible chemical reaction

• No this is not an example of a chemical reaction

Tags

NGSS.MS-PS1-2

Wood burning. Is this an example of a chemical reaction?

• Yes it is an example of a chemical reaction

• No this is not an example of a chemical reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Nails can rust and change colour from a silver metal to a reddish brown colour. In which test tube(s) did a chemical reaction occur.

• A only

• D only

• B and C

• A and D

Tags

NGSS.MS-PS1-2

A balloon is placed over the top of a bottle to capture any gas produced. Which situation likely involved a chemical reaction?

• Situation A

• Situation B

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is this reaction endothermic or exothermic?

• Exothermic

• Endothermic

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Two chemicals are mixed and the beaker becomes cold. Is this reaction exothermic or endothermic?

• Exothermic

• Endothermic

Tags

NGSS.MS-PS1-4

When a clear colourless solution is poured into another clear colourless solution, a bright yellow precipitate forms. What is a precipitate?

• a new liquid formed by the reaction

• a cloudy gase that formed due to the reaction

• a fine solid formed by the reaction

Tags

NGSS.MS-PS1-2

When is melts and turns from solid ice water into liquid water we have the following equation.

H₂O(s) + heat ---> H₂O(l)

Which statement is correct about this equation.

• It represents a chemical reaction

• It represents a change of state

Tags

NGSS.MS-PS1-4