This organelle controls what enters and leaves the cell.
What is the cell membrane?
This system transports oxygen, nutrients, and waste through the body.
What is the circulatory system?
What molecule carries genetic information in living things?
What is DNA?
The smallest unit of matter that retains the properties of an element.
What is an atom?
A property that can be observed without changing a substance’s identity.
What is a physical property?
This structure contains the cell’s DNA and acts as the control center.
What is the nucleus?
This system includes the brain and spinal cord.
What is the nervous system?
These are the basic units of heredity that are passed from parents to offspring.
What are genes?
A substance made of only one type of atom.
What is an element?
A property that describes how a substance reacts to form new substances.
What is a chemical property?
In plant cells, this organelle captures sunlight to make food.
What are chloroplasts?
This system allows you to breathe and exchange gases like oxygen and carbon dioxide.
What is the respiratory system?
This term describes different forms of the same gene (like tall or short plants).
What are alleles?
A substance made of two or more different elements chemically combined.
What is a compound?
A change like melting or freezing that does not create a new substance.
What is a physical change?
This jelly-like substance fills the inside of a cell and holds organelles in place.
What is cytoplasm?
This system helps protect the body and includes skin, hair, and nails.
What is the integumentary system?
If an organism has two identical alleles for a trait, it is called this.
What is homozygous?
This part of the atom has a positive charge.
What is a proton?
A change that forms a new substance.
What is a chemical change?
In plant cells, this organelle captures sunlight to make food.
What are chloroplasts?
This system breaks down food into nutrients the body can use.
What is the digestive system?
Two or more atoms bonded together.
What is a molecule?
A process where substances react to form new substances.
What is a chemical reaction?