Interactions and ecosystems
Describe the four basic needs all living things require to survive.
food, water, shelter and exchange of gases
This method of heat transfer occurs when warm air rises and cool air sinks.
convection
The main function of mitochondria in a cell.
produce energy
The main source of natural light on Earth.
the sun
A push or pull acting on an object.
force
This type of relationship describes when two organisms both benefit from each other.
mutualism
According to the particle model, this happens to particle movement as temperature increases.
increased particle motion
The organ responsible for absorbing food into the bloodstream.
intestines
This model describes light traveling in straight lines.
ray model of light
A structure designed and constructed by humans.
manufactured structure
The scientific study of relationships between organisms and their environment.
ecology
A material that reduces heat flow through conduction, convection, and radiation.
insulator
The correct order of biological organization from smallest to largest.
Cell → Tissue → Organ → Organism
When a pencil appears "broken" in water due to light bending.
refraction
The force involving twisting an object.
torsion
An organism that eats only plants is called this.
herbivore
The total energy of all particles in an object is called this.
thermal energy
The key difference between a unicellular and multicellular organism.
their ability to perform life functions
The type of lens that converges light rays.
convex lenses
The process of melting two pieces of the same material together.
welding
The process where an ecosystem develops in an area that was initially bare.
primary succession
Explain the difference between temperature and thermal energy.
Temperature is the average energy of particles, while thermal energy is the total energy of all particles in an object.
Explain the difference between diffusion and osmosis.
Diffusion involves movement of any particles across a membrane, while osmosis specifically involves water movement across a membrane.
Explain how we perceive color when looking at an object.
We see a color when all other colors are absorbed, and that specific color is reflected.
Explain the difference between mass and weight.
Mass measures the amount of matter in an object, while weight measures the force of gravity acting on that object.