Buoyancy
When an object is ______ dense than the fluid it is in, the object will sink.
More
The force that propels a paper airplane forward
Thrust
Water is made up of two_____ atoms and one ____ atom.
hydrogen and oxygen
The closest planet to the sun
Mercury
The three main states of matter
liquid, gas, solid
The force that causes objects to sink.
Gravity.
The aerodynamic force that slows a paper airplane down
Drag
Oxygen has a slight _______ charge because there are more electrons around its nucleus.
Negative
The name of the galaxy
Milky Way
the main three phases of the water cycle
evaporation, condensation, precipitation
The amount of space an object takes up
Volume
The aerodynamic force which pulls a paper airplane down
Gravity
The bonds between water molecules are called ______ bonds. These are also found in DNA, between nucleotides.
hydrogen
The planet in between Venus and Mars
Earth
the biome where almost no rain falls and it is very very cold
tundra
The _________ is greater than gravity on an object that floats.
Buoyant force.
To balance a pencil on your finger, you have to find its ___________.
Center of gravity
While water is polar, oil is _______.
nonpolar
a region of space having a gravitational field so intense that no matter or radiation can escape.
black hole
the cell organelle which makes proteins
ribosome
Density is dependent on ______ and _______.
mass and volume
A higher ________ number means airflow is more turbulent. A lower one means airflow is more laminar.
Reynolds
Oil does not mix with water because its charge is ________.
Balanced
when a star dies in an explosion, it is called a _____.
Supernova
DNA stands for ________
deoxyribonucleic acid