Chemistry Basics
Space & Astronomy
Biology & Life Science
Physics Fundamentals
Earth & Environmental Science
200

H₂O is the chemical formula for this

Water 

200

The closest star to Earth

Sun 

200

The basic unit of life 

Cell 

200

This word means is a push or pull acting on an object.

Force 

200

This is the outermost layer of Earth where we live.

Crust 

400

This state of matter has a definite shape and volume

Solid 

400

This planet is mostly made of hydrogen and helium gases  

Jupiter 

400

This organ uses acids and enzymes to break down food after you swallow it.  

Stomach 

400

This type of energy is stored due to an object’s position or height.

Potential Energy 

400

This gas is most responsible for trapping heat in Earth’s atmosphere.

Carbon Dioxide 

600

The smallest unit of an element

Atom 

600

A space rock that burns up in Earth’s atmosphere, often seen as a “shooting star”

Meteor 

600

The process plants use to make food by utilizing sunlight. 

Photosynthesis 

600

This is the amount of matter in an object, often measured in kilograms.

Mass

600

This type of rock forms from cooled lava or magma.

Igneous Rock 

800

The pH scale measures this property

Acidity 

800

This galaxy contains our Solar System

Milky Way Galaxy 

800

This molecule has a double-helix structure and carries genetic instructions for living organisms

DNA 

800

This is the rate at which an object’s velocity changes over time.

Acceleration 

800

The breaking down of rocks into smaller pieces is called this.

Weathering 

1000

Elements are arranged in rows called periods on this chart

Periodic Table 

1000

This famous space telescope has captured deep-space images since 1990 

Hubble Telescope 

1000

This group of animals is defined by the presence of an internal backbone made of bone or cartilage, including mammals, birds, reptiles, amphibians, and fish.

Vertebrate 

1000

This law states that an object at rest stays at rest, and an object in motion stays in motion unless acted on by an outside force.

Newton First Law 

1000

The movement of Earth’s plates is called this

Plate Tectonic 

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