Science
$100 – This planet is known as the Red Planet.
What is Mars?
$100 – This is the largest ocean on Earth.
What is the Pacific Ocean?
$200 – Humans need this gas to breathe.
What is oxygen?
$300 – This part of the plant makes food using sunlight
What are leaves?
$400 – Water changes into this state when it freezes.
What is solid?
$500 – The center of an atom is called this.
What is the nucleus?