Biology
Earth Science
Physical Science
Space Science
Chemistry
100

The basic unit of life.

cell

100

"The layer of Earth we live on."

the crust

100

"The force that pulls objects toward Earth."

gravity

100

"The star at the center of our solar system."

the Sun

100

"The table that organizes all elements."

periodic table

200

''The process plants use to make food using sunlight''

photosynthesis

200

"The hottest layer of the Earth."

the inner core

200

"Matter is made of these tiny particles."

atoms

200

"Our home planet."

Earth

200

"H₂O is the chemical formula for this substance."

water

300

"The part of the cell that contains DNA."

the nucleus

300

"Rocks formed from cooled lava or magma."

igneous rocks

300

"A push or a pull."

a force

300

"The galaxy we live in."

Milky Way Galaxy

300

 "A substance made of two or more elements chemically combined."


 a compound

400

"Organisms that have no nucleus."

prokaryotes

400

"The movement of Earth’s plates"

 plate tectonics

400

"Energy of motion."

kinetic energy

400

"A giant ball of gas that produces light and heat."

a star

400

 "The smallest particle of a compound."

a molecule

500

"The molecule that carries genetic information."

DNA

500

"When two plates slide past each other, they cause these events."

earthquakes and fracture the Earth's crust

500

"The smallest unit of an element that still has its properties."

an atom

500

"The force that keeps planets in orbit."

 gravity

500

"The number of protons in an atom determines this."

atomic number

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