Question

Study the table.

Substance

Motion of Particles

W

moving around and vibrating, getting slower over time

X

vibrating, getting slower over time

Y

moving around and vibrating, getting faster over time

Z

vibrating, getting faster over time


Which substances are cooling down?

Select all that apply.

Responses

Substance XSubstance X

Substance ZSubstance Z

Substance YSubstance Y

Substance WSubstance W
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Answer 1

To determine which substances are cooling down, we need to look for the ones indicating a decrease in motion or kinetic energy of their particles over time.

1. **Substance W**: "moving around and vibrating, getting slower over time" - This indicates that the particles are losing energy and slowing down, suggesting cooling.
2. **Substance X**: "vibrating, getting slower over time" - This also indicates a decrease in energy and motion, suggesting cooling.
3. **Substance Y**: "moving around and vibrating, getting faster over time" - This indicates that the particles are gaining energy and moving faster, suggesting heating rather than cooling.
4. **Substance Z**: "vibrating, getting faster over time" - This also indicates an increase in energy and motion, suggesting heating rather than cooling.

Based on this analysis, the substances that are cooling down are:

- **Substance W**
- **Substance X**