What is a noun ?

Which of the following is a noun ?

Which word in the following sentence is a noun? I eat chocolate cookies.

Choose the common nouns in this sentence: My dog Shaggy loves food.

Choose the proper nouns in this sentence: McDonalds sells many Big Macs every Friday.

What is a proper noun?

How should this sentence be correctly written: on tuesday, Elliot celebrated his Birthday.

How should this sentence be correctly written: i tried to call katie to ask her to bring me some pizza hut.

Are the following proper or common nouns? Maggie, Josh, and Aaron

Are the following proper or common nouns? policeman, teacher, lawyer

Are the following proper or common nouns? White House, Congress, Supreme Court of the United States

How should this sentence be correctly written: I am so excited that it is almost steelers season again.

How should this sentence be correctly written: Wyoming, montana, and utah are states.

How should this sentence be correctly written: My favorite snacks are oreos, pretzel chips, and doritos.