8TH GRADE SCIENCE STAAR REVIEW
How many Oxygen (O) atoms are in 2C2HO8Cl2
Answer: 16
If the mass number of this chlorine atom is 36, how many neutrons does it have?
Answer: 19
what group number are the noble gases
Answer: 19
How many aluminum atoms are in Al2(SO4)3?
Answer: 2
If an atom has 10 protons, 10 neutrons, and 10 electrons, what is the mass of the atom?
Answer: 20
Give an example of a contour interval
Answer: 20 m
A 20 kg bike accelerates at 10 m/s2. what was the force?
Answer: 200 Newtons
What is the mass number of the atom with 11 protons and 12 neutrons
Answer: 23
How many atoms are in the neurotransmitter serotonin? The formula for serotonin is C10H12N2O
Answer: 25
How many elements are in C6H12O6?
Answer: 3
How many molecules of Carbon are in the following formula? 3C2H6
Answer: 3
an atom with atomic number 6 would have how many protons
Answer: 6
NON-living things found in an ecosystem
Answer: Abiotic
Variety of life
Answer: Biodiversity
A rift valley occurs at a ____________ boundary.
Answer: Divergent
What law is best described by inertia?
Answer: First Law
What is Newton's Third Law?
Answer: For every action there is an equal and opposite reaction
What do contour lines that are farther apart represent?
Answer: Gentle Slope
The vertical (up and down) columns in the Periodic Table are called
Answer: Groups
What type of air pressure is present with a warm sunny day?
Answer: High
Blue stars are the _____________.
Answer: Hottest
Most stars are made of which elements?
Answer: Hydrogen and Helium
What type of air pressure is present with rain?
Answer: Low
Which category is our Sun located in?
Answer: Main Sequence
Which of the following list the correct order of the life cycle of massive stars?
Answer: Nebula --> protostar --> main sequence --> red supergiant --> supernova --> black hole
Particles in an atom that are neutral and have no charge are
Answer: Neutrons
Is the following equation balanced?...Al + O2 --> 2Al2O3
Answer: No
The horizontal (side to side) rows in the Periodic Table are called
Answer: Periods
Small consumers that are hunted and eaten by larger consumers
Answer: Prey
An organism that can make its own food
Answer: Producer
The substances listed on the right side of a chemical equation are the
Answer: Products
Earth's ________ on its axis causes day and night.
Answer: Rotation
What does the tilt of the earth cause?
Answer: Seasons
Acceleration of an object happens when things
Answer: Speed up, Slow down, or Change Direction.
What type of boundary occurs when two plates slide past each other?
Answer: Transform
When something has speed in a certain direction it is called...
Answer: Velocity
What Type of moon is this?
Answer: Waning crescent
Is the following equation balanced? 2C2H2 + 5O2 --> 4CO2 + 2H2O
Answer: Yes
Answer:Element or compound? H2O
Answer: compound
What are the final two stages of a medium mass star?
Answer: white dwarf - black dwarf
Our sun is currently in what star stage?
Answer:Main Sequence
