Chemistry
A substance that consists of a single type of atom is _________.
A chemical element
What does the 'photo' in photosynthesis mean?
Light
Anything that has mass and takes up space is called__________.
Matter
The ultimate energy source for Earth is_____________.
The Sun
A group of tissues is a(n)____________.
An organ.
What is the Greek word for atomos?
Uncuttable or something that cannot be divided
What does DNA stand for?
Deoxyribonucleic acid
Which of Newton's laws of motion states for every action, there is an equal and opposite reaction?
Newton's Third Law
What is the term that defines burning fossil fuels?
Combustion
The three primary types of muscle present in the human body are ____________________.
Skeletal, cardiac, and smooth.
What is the smallest unit of an element that retains its chemical properties?
An atom
Which part of the cell is responsible for controlling cell activities and contains genetic material?
Nucleus
What is the opposing force of gravity?
Normal Force (Fn)
Which of the following is NOT a fossil fuel?
Coal, Natural Gas, Oil, Uranium
Uranium
The tubes that carry blood back to the heart are__________.
Veins
Which of the following elements is a noble gas:
Oxygen, Nitrogen, Helium, Carbon
Helium
What is the purpose of enzymes in biological processes?
To speed up chemical reactions without being used up
Seat belt laws are a good idea because of which law of motion?
Newton's First Law of Motion (Law of Inertia)
In the following food chain, which organism is the secondary consumer?
grass ------> rabbit -------> snake ------> hawk
The snake (eating the primary consumer)
How many chromosomes does the human body possess?
46 chromosomes (23 pairs in each cell)
How many valence electrons does an atom require to have a full shell?
8 valence electrons
A zygote is formed when________________.
A sperm and an egg fuse during fertilization
Friction causes kinetic energy to be converted into what form of energy?
Thermal energy
What is it called where a freshwater river meets the ocean?
Estuary
What gland assists the body in responding to stressful situations.
Adrenal glands