A student notices dogs have more fleas in the summer than in the winter. Based on these observations, which is the most logical question for the student to investigate? OPTIONS:
- How does wind affect the amount of fleas on dogs?
- How does diet affect the amount of fleas on dogs?
- How does rain affect the amount of fleas on dogs?
- How does temperature affect the amount of fleas on dogs?
A: How does temperature affect the amount of fleas on dogs?

A student determined the density of different bars of soap. Which should the student most likely do to check the accuracy of the results? OPTIONS:
- complete the experiment in one day
- test multiple brands of soap
- record data in metric units
- repeat the experiment
A: repeat the experiment

Where do plants get energy from to make food? OPTIONS:
- air
- soil
- water
- sunlight
A: sunlight

Roger poured water over a pile of sand. Some of the sand washed away. This process is similar to which of the following? OPTIONS:
- The eruption of a volcano
- The erosion of the walls of a canyon
- The uplifting of mountain ranges
- The forming of dunes or mounds in a desert
A:
The erosion of the walls of a canyon