Earth science
What unit measures the distance light travels in one year?
A light year
What is the term for speed with a direction
Velocity
What process do parts use to convert sunlight into chemical energy?
Photosynthesis
When a liquid is changed to a solid it is called?
Freezing
Light is a form of what?
Energy
What force is keeping the planets orbiting around stars?
Gravity
What force resist motion between two surfaces that are touching
friction
What is the name of DNA's twisted ladder shape
double helix
What is the electron on the outermost energy level of an atom called?
Valence electrons
What phenomenon shows that distant galaxies are moving away from us?
Redshift
How old is the universe according to the big bang theory?
14.8 billion years old
What happens to an object's kinetic energy when the speed doubles?
It quadruples
Protein
What type of reaction occurs when an acid and a base combine to form water and a salt?
This phase of mitosis is when chromosomes line up in the middle of the cell
Metaphase
An organism that eats other organisms for food is called a?
Consumer
What is the flow of electric charge through a wire called
Electric current
What term describes the body's ability to maintain stable internal condition?
Homeostasis
Melting ice is an example of this type of energy absorbing process.
Endothermic
What type of cell send signals throughout your nervous system
Neurons
Which atmospheric layer is the ozone layer located?
The stratosphere
What sound property determines how high or low a sound is?
Frequency
Sickle-cell disease is caused by a mutation in the gene that codes for this protein
hemoglobin
This noble gas makes up about 1% of the earth's atmosphere
Argon
What group of element on the periodic table almost never react with anything?
Noble gas