earth science
This is an earthquake that occurs underwater and can create large waves in the ocean.
tsunami
This organ pumps blood throughout your body.
the heart
who goes into space?
astronauts
This part of the plant helps it absorb water from the ground.
The roots
what is bad to breathe in?
carbon dioxide
This is the gas that makes up most of Earth's atmosphere and is essential for breathing.
oxygen
this system helps you breathe by bringing in oxygen and releasing carbon dioxide.
respiratory system
The Earth orbits around this star.
The sun.
A cold-blooded animal that lives in water and breathes through gills.
A fish
This element is found in the air and is also part of water (H2O).
hydrogen
This is a renewable resource used for growing plants and crops.
soil
These single-celled organisms can live in many environments and are sometimes harmful to humans.
bacteria
This planet is known for its beautiful rings.
Saturn
These animals lay eggs and are cold-blooded.
reptiles
This element is known for its reddish color and is used to create pennies.
copper
This is the outermost layer of the Earth, made up of solid rock.
the crust
This is the largest organ in the human body.
skin
This planet is known as the "Red Planet" because of its reddish appearance.
mars
This process is how plants make their own food using sunlight.
photosynthesis
This soft rock is often used for carving statues and comes in a variety of colors. usually white and grey
marble
The Earth's orbit around the Sun takes about this many days.
365 days
This part of the nervous system includes the brain and spinal cord.
the central nervous system
What is the closest planet to the Sun?
Mercury
This is an adaptation that allows animals like bats and dolphins to navigate by making sounds and listening to the echoes.
echolocation
This is the hardest known natural material found on Earth.
a diamond