This American lake is the largest lake in the world.
What is "Lake Superior?"
Fun fact: The deepest lake in the world is "Lake Baikal" in Russia.
100
A gas that is used to fill party balloons and blimps.
What is "Helium?"
Fun fact: If you breathe helium, your voice gets very squeaky.
100
The environmental home of a species.
What is a "Habitat?"
100
This bodily response keeps your body cool on a hot day.
What is "Sweating?"
100
The three states of matter.
What are solids, liquids, and gases?
200
This continent is the largest continent on Earth.
What is "Asia?"
200
An element that we breathe.
What is "Oxygen?"
Also acceptable: "Nitrogen", "Argon"
200
The process that plants use to gain nutrition from sunlight.
What is "Photosynthesis?"
200
This part of the human body fights off infectious disease.
What is "The Immune System."
Also acceptable: "White blood cells"
200
This man created the three laws of motion.
Who is "Issac Newton?"
300
This invisible barrier keeps air from escaping into space. It also protects earth from asteroids.
What is "the Atmosphere"
300
A lightweight metal used in cooking foil and in airplane wings.
What is Aluminum?
300
A web that shows how organisms are related to each other based on what they eat.
What is a "Food Chain?"
Also acceptable: "Food Web"
300
This part of your skeleton protects many of your internal organs.
What is "the Ribcage?"
Also acceptable: "Ribs"
300
This invisible force causes people and objects to move towards the center of the earth.
What is "Gravity?"
400
The length of time it takes the Earth to orbit the Sun.
What is 365 days?
Also acceptable: 1 year
Fun fact: It actually takes 365 and 1/4 days for the Earth to orbit the Sun, but we only count that extra time on leap years (every four years).
400
This element is found in table salt and public pools.
What is "Chlorine?"
400
This term is used to describe the population of a species that is close to becoming extinct
What is "Endangered?"
Also acceptable: "Critically endangered"
400
This bone structure connects your nervous system to your brain.
What is "the Spine"?
400
The process of creating heat by rubbing two objects together quickly.
What is "Friction?"
500
The number of humans living on earth recently passed this large number.
What is "7 Billion?"
Fun fact: The current population is over 7.3 Billion and it will likely reach 7.4 billion by the end of 2017.
500
This element appears in nearly all living things.
What is "Carbon?"
500
A scientist that studies animals
What is "a zoologist?"
500
This organ is the largest organ of the human body.
What is "Skin?"
An organ is a group of related cells that combine to perform one or more specific functions within the body.
500
This effect of physics takes place when a car brakes quickly but the driver keeps moving.