North Dakota A+ Science Grade 4 Practice Questions - North Dakota A+ Summative Science - Grade 4 Exam

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On a dry winter day, a student rubs a balloon against her hair. Her hair then stands up and is pulled toward the balloon. What is the most likely cause?

Static electric charge built up on the balloon and attracts her hair. The balloon becomes magnetic and pulls on her hair. Gravity between the balloon and her hair gets stronger. The balloon gets heavier and pushes the hair upward.

Correct Answer:

Static electric charge built up on the balloon and attracts her hair.

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