Body Organization
This is the smallest living unit of the human body.
Cell
This system breaks down food and absorbs nutrients.
Digestive system
This word means the variety of living things in an area
.Biodiversity
This star is at the centre of our solar system.
The Sun
This is the largest ocean on Earth.
Pacific Ocean
A group of similar cells working together forms this.
Tissue
These tiny air sacs in the lungs are where oxygen and carbon dioxide move between air and blood.
Alveoli
This is the place where a living thing lives and finds what it needs to survive.
A habitat
This planet is known as the Red Planet.
Mars
This ocean lies between North America and Europe.
Atlantic Ocean
The brain, spinal cord, and nerves work together at this level of organization.
An organ system
What is the other name of wind pipe?
Trachea
A large region with a similar climate and characteristic plants and animals is called this.
Biome
This force keeps planets in orbit around the Sun.
Gravity
This deep ocean trench contains the deepest known point in the ocean.
Mariana Trench
Put these in order from smallest to largest: organ, atom, organism, molecule, tissue, cell, organ system.
Atom → molecule → cell → tissue → organ → organ system → organism
These organs filter blood, removing wastes and extra water to produce urine.
Kidneys
This includes all parts of Earth where life exists, including land, water, and air.
Biosphere
Why does the Moon appear bright even though it does not produce its own light?
It reflects sunlight.
This force, mainly from the Moon, causes ocean tides.
Gravity
The stomach, intestines, and liver belong to this organ system.
The digestive system
This system carries blood, oxygen, and nutrients around the body.
Circulatory system
This biome is warm and rainy and has many different kinds of plants and animals.
Tropical rainforest
During this event, the Moon moves between Earth and the Sun, blocking our view of part or all of the Sun.
A solar eclipse
These tiny drifting organisms use sunlight to make food and produce oxygen in the ocean.
Phytoplankton