science test

Multiple choice

A

D

A

D

A

A

D

B

B

C

True or False

True

True

True

True

False

True

False

True

True

False

Short answers

1. None

2. Naturally charged

long answer 1 Like charges repel, opposite charges attract, neutral objects attract charged objects. Explain one of them. Draw a picture.

1. Like charges repel, opposite charges attract, neutral objects attract charged objects. Explain one of them. Draw a picture. Like charges repel each other due to the electromagnetic force, one of the four fundamental forces of nature. This repulsion happens because of the electric field each charge produces. The fields interact in a way that pushes like charges apart.

long answer 3 Explain how a balloon sticks to a wall and add a diagram.

1. A balloon sticks to a wall due to static electricity. When you rub the balloon on something like your hair, it picks up extra electrons and becomes negatively charged. As the balloon approaches the neutral wall, it repels electrons in the wall’s surface, making the surface slightly positive. Opposite charges attract, so the negatively charged balloon sticks to the now slightly positively charged wall.

long answer 4 electric force and electric charge.

1. Electric charge is a physical property of matter that causes it to experience a force when near other charged matter. Electric force is the force between two charged objects.

long answer 5 Explain grounding and add an example

Grounding is the process of connecting an object to the Earth to safely transfer excess electric charge. It allows electrons to flow into or out of the object, neutralizing its charge and preventing electric shock or damage.