This is the smallest unit of an element that still has that element’s properties.
What is an atom?
This protein in red blood cells carries oxygen.
What is hemoglobin?
This planet is famous for its reddish appearance.
What is Mars?
Earth’s outer shell is broken into large moving pieces called these.
What are tectonic plates?
In an experiment, this group does not receive the variable being tested.
What is the control group?
This negatively charged particle moves around an atom’s nucleus.
What is an electron?
These tiny air sacs in the lungs are where oxygen and carbon dioxide are exchanged.
What are alveoli?
This is the largest planet in our solar system.
What is Jupiter?
Molten rock beneath Earth’s surface is called this.
What is magma?
A solution with a pH of 7 is described as this.
What is neutral?
An element’s atomic number tells you the number of these particles in its nucleus.
What are protons?
This part of the brain controls balance and coordination.
What is the cerebellum?
Our solar system is located in this galaxy.
What is the Milky Way?
This process occurs when water vapor cools and changes into liquid water.
What is condensation?
This substance speeds up a chemical reaction without being used up.
What is a catalyst?
Atoms of the same element with different numbers of neutrons are called these.
What are isotopes?
The functional filtering unit of the kidney is called this.
What is a nephron?
This is the point around a black hole beyond which light cannot escape.
What is the event horizon?
Most fossils are preserved in this type of rock.
What is sedimentary rock?
In DNA, adenine pairs with this base, while cytosine pairs with guanine.
What are thymine and guanine?
This element has the highest electronegativity, meaning it attracts electrons more strongly than any other element.
What is fluorine?
These immune cells can develop into plasma cells that produce antibodies.
What are B cells, or B lymphocytes?
This limit describes the maximum mass of a stable white dwarf star, about 1.4 times the mass of the Sun.
What is the Chandrasekhar limit?
This force causes moving air and water to curve because of Earth’s rotation.
What is the Coriolis effect?
This laboratory technique makes millions of copies of a specific section of DNA.
What is PCR, or polymerase chain reaction?