Biology
Which organ pumps blood through the body?
The heart
What force pulls objects towards Earth?
Gravity
What is water made of?
What is Earth's natural satellite?
The moon
Which layer of Earth do we live on?
What part of the plant makes food using sunlight?
The leaf
What is the unit for measuring force?
Newton
What do we call the process where a liquid turns into a gas?
Evaporation
What planet is closest to the Sun?
Mercury
What is the largest ocean on Earth?
Pacific ocean
Which type of blood cells help fight infections?
White blood cells
What device converts electrical energy into sound?
Speaker
What is the chemical symbol for gold?
Au
What do we call a rock from space that reaches Earth's surface?
Meteorite
What causes ocean tides on Earth?
The moon's gravity
Which vitamin does the human body produce when exposed to sunlight?
Vitamin D
What happens to an object's speed when friction increases?
It decreases
Which subatomic particle has a negative charge in an atom?
Electron
What is the name of the first artificial satellite?
Sputnik
Which layer of Earth protects us from harmful ultraviolet rays?
Ozone layer
What is the name of the protein in red blood cells that carries oxygen?
Hemoglobin
Who is known as the father of modern physics?
Isaac Newton
A student mixes baking soda and vinegar together in a cup, and it starts to bubble and fizz. This reaction shows what kind of change?
A chemical change because a new gas is produced.
Which term describes a star that suddenly brightens due to an explosion?
Supernova
What is the name of the layer of permanently frozen soil in polar regions?
Permafrost