Answer:
How effective is a new toothpaste in reducing cavities? Observational study
How does the daytime temperature affect the.....- Observational study
Which is a better absorber of heat.... - Controlled experiment
Can plants prepare food even In artificial light.- Controlled experiment
Why does a rolling ball slow down as it moves.- Controlled experiment
Please check if the answers are right first
Son todos los alimentos que la gente come esperanza esto ayuda a mate =)
