Chemistry
What is a chemical change?
The type of change that happens when chemical bonds break and new bonds form which creates a new substance.
Almost all multicellular organisms on Earth belong to this domain
Eukarya
The type of plate boundary where the sea-floor spreading occurs
What is divergent?
The Earth is made of ___% of fresh water
less than 3%
We get energy from eating food. What is the name of the energy we convert into energy used for cell function ?
ATP
what factor (variable) is changed when testing a hypothesis
independent variable
The two most abundant element on Earth's
Hydrogen and Oxygen
The SI unit for force
Newton
These types of fossils help tell the absolute age
Index Fossils
Where can I find valence electrons?
in the outermost shell
Principle where the youngest rocks are at the top of the sequence and the oldest are at the bottom.
law of superposition
factors that remain the same throughout an experiment (they are what results are compared to)
controlled variables
The only sure evidence for a chemical reaction
a new substance
A liquid will become this state of matter if the particles gain kinetic energy
A gas
Genetic variations among individuals in a population give some an advantage in surviving and reproducing in their environment.
Natural Selection
Which of the following represents a molecule that is not a compound? CO2, Fe, O2, and CO
Fe
The past and current movements of the Earth's crust provides an understanding of its geological history and causes Earthquakes
Plate Tectonics
the part of the scientific method that involves gathering data in an orderly way
observing
What are reactants?
The substances listed on the left side of a chemical equation
Name 5 physical properties.
shape, color, size, mass, texture (weight, odor)
Viruses can only be cured by
Vaccines
Every molecule of water contains_____
two hydrogen and one oxygen atom
The loss of about 3/4 of all species in existence across the entire Earth over a “short” geological period of time.
What is a mass extinction?
Element group that are shiny, malleable, ductile, and good conductors
Metals
What does the atomic mass represent?
The sum of protons and neutrons
The father of evolution
Charles Darwin
A typical atom of AL has 13 electrons and 14 neutrons. How many protons does this atom have?
13
The protective covering that encloses every cell is called
Cell membrane
Name the six steps of the scientific method
1. state the problem
2. gather information
3. formulate a hypothesis
4. test the hypothesis
5. record and analyze
6. state the conclusions