This system includes the heart and blood vessels.
What is the circulatory system?
This is the basic unit of life.
What is a cell?
The smallest unit of an element.
What is an atom?
This is the first step of the scientific method.
What is asking a question?
This state of matter has no definite shape but a definite volume.
What is a liquid?
These are the functional units of the kidney.
What are nephrons?
These structures produce energy in the form of ATP.
What are mitochondria?
Water has this type of bond between hydrogen and oxygen.
What is a covalent bond?
A testable prediction is called this.
What is a hypothesis?
This vitamin is produced when skin is exposed to sunlight.
What is vitamin D?
This part of the brain controls balance and coordination.
What is the cerebellum?
DNA is located in this part of the cell.
What is the nucleus?
The pH value of a neutral solution.
What is 7?
In an experiment, the variable that is changed on purpose.
What is the independent variable?
These carry oxygen in the blood.
What are red blood cells?
This muscle type is involuntary and found in organs.
What is smooth muscle?
The process by which plants make food using sunlight.
What is photosynthesis?
This type of reaction absorbs heat.
What is an endothermic reaction?
A conclusion is based on this type of evidence.
What is experimental data?
This organ filters blood and makes urine.
What is the kidney?
This hormone, released by the pancreas, lowers blood glucose.
What is insulin?
This is the name for the movement of water through a semi-permeable membrane.
What is osmosis?
These particles are found in the nucleus and have no charge.
What are neutrons?
The group used as a standard for comparison.
What is the control group?
This type of blood vessel carries blood away from the heart.
What is an artery?