Now and 13b.y.a.
The Earth's landmasses were once part of this supercontinent over 300 million years ago.
What is Pangaea?
About 70% of a healthy human body is composed of this 18-gram-per-mole substance.
What is water?
An object's velocity stays constant until a nonzero amount of this acts on it.
What is force?
Seeds are eaten by a mouse, which is eaten by a snake, which is eaten by a hawk. These are all "links" in this kind of diagram.
What is a food chain?
Different sets of body parts work together to achieve different tasks, as this type of formation.
What is a body system? or What is an organ system?
This visible line on Earth's surface is evidence that pieces of the crust move as time goes on.
What is a fault line (fault)?
This type of energy is proportional to the motion of objects that you can see.
What is kinetic energy?
A nuclear furnace, it is the source of energy for almost all ecosystems.
What is the sun?
When a genetic trait passed down is different between the parents, this cross-reference of alleles is considered to be heterozygous.
What is a genotype?
This effect, named after a place to store your plants in the winter, keeps thermal energy close to the Earth's surface.
What is the greenhouse effect?
The T-shirts that should have arrived today feature this chemical structure format.
What is the Lewis dot structure?
Like with spring constants, this property has a different net equation depending on if its objects are parallel to each other or one-after-the-other.
What is electrical resistance?
The term for organisms that form the base of the food pyramid.
What are autotrophs? or What are producers?
If a faulty cell continues to reproduce, it can cause a form of this disease.
What is cancer?
Circulation of matter in this very hot, semi-solid layer underneath the crust causes plate tectonics.
What is the mantle?
Gravity is the only explanation for your movement in this projectile-related situation.
What is freefall?
These organisms consume the remains of all trophic levels and thus make nutrients available for new organisms.
What are decomposers?
Your body temperature is kept at around 37°C due to this endothermic feature
What is homeostasis?
This object formed out of a spinning cloud of gas and dust 4.6 billion years ago.
What is the Earth?
This tendency in Newton's First Law is why you surge forwards after slamming the brakes in a car.
What is inertia?
Though it might have a small population, this type of species has an impact on many others in its ecosystem.
What is a keystone species?
This term is the name for the sequence of phases the chromosomes go through when a cell divides.
What is mitosis?