Earth
Earth was formed approximately ____ ago.
4.6 billion years ago
____ is a guess based on observation
Hypothesis
The atomic number of Iridium is
77
Protons carry ____ charge
Positive
The temperature at which water turns into steam is called the _____
Boiling point
Earth is part of ______ galaxy
Milky Way
Conclusion is based on the results of the___
Experiment
The Atomic symbol of Silver is
Ag
Electrons have _____ charge
Negative
The temperature at which water turns to ice is called
Freezing point
The Milky way galaxy is ____ shaped
Spiral
The Water cycle consists of
Evaporation, Condensation, Precipitation
The element to the left of Xenon is
Iodine
Nucleus of an atom holds
Protons and Neutrons
A rabbit, a grass snake and an aphid are all____
Level 1 consumers
____ % of the Earth's surface has water
77%
The process of ____ changes Nitrogen into usable form
Fixation
Which element has 16 protons
Sulfur
A molecule is made up of ____
Atoms
Grass is a ______
Producer
Stars are giant balls of ____
Gas
Name three cycles that we have studied
Water, Carbon, Nitrogen
How many neutrons does Nitrogen have
7
Chemical formula for Salt is ____
NaCl
A fox would be a level ___ consumer
Two