Chemistry
General 8th grade science
Rock and roll
Elements
Earth & Space Science
Life Science
100
What is a chemical change?
The type of change that happens when chemical bonds break and new bonds form which creates a new substance.
100
The attraction between two objects that have mass
What is gravity?
100
The type of plate boundary where the sea-floor spreading occurs
What is divergent?
100
Three states of matter
What is solid, liquid and gas
100
The distance between the center of the sun and the center of the Earth
What is an astronomical unit (AU)?
100
The protective covering that encloses every cell is called
Cell membrane
200
The two most abundant element on Earth's
Hydrogen and Oxygen
200
The SI unit for force
Newton
200
These types of fossils help tell the absolute age
Index Fossils
200
Two or more elements chemically bonded
What is a compund
200
The hottest planet (You can use your green reference sheet)
What is Venus? (Due to greenhouse effect)
200
The father of evolution
Charles Darwin
300
Unit of metric measurement for mass
What are grams?
300
A liquid will become this state of matter if the particles gain kinetic energy
A gas
300
The past and current movements of the Earth's crust provides an understanding of its geological history and causes Earthquakes
Plate Tectonics
300
Which of the following represents a molecule that is not a compound? CO2, Fe, O2, and CO
Fe
300
Viruses can only be cured by
Vaccines
400
Most of the volume of an atom
What are the electron orbitals?
400
Name 5 physical properties.
shape, color, size, mass, texture (weight, odor)
400
Two events that can cause a mass extinction
What are volcanic eruptions, climate changes, asteroid collisions
400
Every molecule of water contains_____
two hydrogen and one oxygen atom
400
What is a waxing crescent moon
400
We get energy from eating food. What is the name of the energy we convert into energy used for cell function ?
ATP
500
Three quantitative observations in this classroom
Any answers that refer to the quantity (number) of things!
500
Has evidence, can withstand repeated testing, and is supported by research and researchers
What is a theory?
500
Principle where the youngest rocks are at the top of the sequence and the oldest are at the bottom.
law of superposition
500
A typical atom of AL has 13 electrons and 14 neutrons. How many protons does this atom have?
13
500
Genetic variations among individuals in a population give some an advantage in surviving and reproducing in their environment.
Natural Selection
600
What are reactants?
The substances that interact to form a new compound
600
Light waves pass through a material and are bent
What is refracted?
600
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?
600
What does the atomic mass represent?
The sum of protons and neutrons
700
The only sure evidence for a chemical reaction
a new substance
700
The distance between crests of the waves
What are wavelengths?
700
Name of the supercontinent created early in Earth's history
What is pangeae?
700
The state of matter with the most energy?
What is the gaseous state?
700
When the moon is facing the Earth
What is a new moon?