Structure of the Atom
Found at the very center of the atom, this dense core contains both protons and neutrons.
What is the nucleus?
This outer layer is found only in plant cells, giving them a strong, rigid, box-like structure.
What is the cell wall?
This blood vessels have thick, muscular walls to withstand the high pressure of blood being pumped away from the heart.
What is an artery?
This celestial object is a massive, luminous ball of plasma, like our Sun, held together by its own gravity and powered by nuclear fusion.
What is a star?
This is the physical state of matter where particles are tightly packed together in a fixed, regular pattern and can only vibrate in place.
What is a solid?
This is two subatomic particles both have a relative mass of 1, but one has a positive charge while the other has no charge at all.
What is proton and neutron?
This part of the microscope is the lens you look directly through, and it usually magnifies the image by 10 times.
What is the eyepiece lens?
This type of blood cell contains hemoglobin and is responsible for carrying oxygen around the body.
What are red blood cells?
This is a natural satellite that orbits a planet; the Earth has only one, while Jupiter has dozens.
What is a moon?
This state of matter has no definite shape and no definite volume, as its particles are widely spaced and free to move rapidly in all directions.
What is a gas?
This rule states that the first electron shell closest to the nucleus can hold a maximum of only this many electrons.
What is two?
Often called the "brain" of the cell, this structure controls all cell activities and contains the genetic information (DNA).
This chamber of the heart has the thickest muscle wall because it has to pump oxygenated blood to the entire body.
What is the left ventricle?
Often called "dirty snowballs," these celestial objects are made of ice, dust, and rock, and develop a visible tail when they get close to the Sun.
What is a comet?
This is the unique temperature at which a liquid rapidly changes into a gas throughout the liquid, not just at the surface.
What is the boiling point?
This total number is calculated by adding the number of protons and the number of neutrons together in an atom's nucleus.
What is mass number?
When setting up a microscope slide, you slowly lower this small, thin piece of glass at an angle over the specimen to prevent air bubbles.
What is a coverslip?
These tiny, thin-walled blood vessels are only one cell thick, allowing nutrients and gases to easily pass between the blood and body cells.
What are capillaries?
Discovered beyond Neptune, Pluto was reclassified as this specific type of celestial object in 2006 because it has not "cleared its neighborhood" of other debris.
What is a dwarf planet
Unlike a compound, this substance contains two or more substances mingled together but not chemically combined, meaning it can be easily separated.
What is a mixture?
This is the mass of an electron.
What is 1/1840?
The stain use to make the cell contains of a plant cell more visible.
What is iodine?
Veins contain these special structures to prevent the backward flow of blood as it travels against gravity back to the heart.
What are valves?
Located between the orbits of Mars and Jupiter, this region of space is occupied by numerous irregularly shaped rocky bodies.
What is the Asteroid Belt?
This is a pure substance made up of only one type of atom, and it cannot be broken down into anything simpler by chemical means.
What is an element?