Chemistry
What does the atomic number equal for an element?
Number of protons
What force governs the motion of our solar system?
gravity
Give an example of an abiotic factor.
Compare and contrast physical and chemical changes.
5 senses vs reaction
What is it called when the Earth spins around the sun?
Revolution
Which groups are the most unstable? Most stable?
1 & 17, 18
supports the body, facilitates movement, protects internal organs
Rotation
What is the mass number of a potassium (K) atom that has 20 neutrons?
39
Which statement best describes a galaxy?
A. A cloud of gas that is the birthplace of stars
B. A system of billions of stars, gas, and dust held together by gravity
C. A ball of plasma that experiences nuclear fusion in its core
D. A mass of dust and ice that orbits a star in an elliptical pattern
B
What is the main difference between a prokaryotic and eukaryotic cell?
Eukaryotic cell
A student is trying to classify an unidentified, solid gray material as a metal or a nonmetal. Which question will best help the student classify the material?
A. Is the material malleable or ductile?
B. Does the material feel hard to touch?
C. Will the material float in water?
D. Does the material feel rough or smooth?
A
What two factors affect the change in seasons?
Direct/indirect sunlight
Which of these formulas contain equal numbers of nitrogen atoms?
Co(NO3)2
(NH4)3PO4
Al(NO3)3
NH4NO3
Co(NO3)2 , (NH4)3PO4, Al(NO3)3
Which statement about stars is correct?
F. Star formation begins in a nebula
G. White dwarfs become main-sequence stars when they gain mass
H. Supergiants are stars that can absorb black holes
J. Main-sequence stars are formed by comets.
F
Potential: energy that comes from its position
What is Ms. K's favorite color?
black
Give an example of time that it human made and not designated by nature.
C6H12O6 + 6O2 -----> 6CO2 + 6H2O + energy
How many atoms are represented in the reactants of this equation?
36
Calculate the density of a block that weighs 225 lbs and has a volume of 25 mL.
Don't forget units!
10 lbs/mL
Where was Ms. K born?
Houston
Which part of the world experiences the most amount of change in daylight/night time? Why?
A. Equator
B. Poles
B. Poles because it receives varied amounts of indirect sunlight that makes days in the summer longer and the days in the winter shorter