Chemistry
Matter cannot be created nor destroyed.
The law of conservation of mass.
Which of Newtons Laws best explains how the thrust from a rocket’s engine lifts the rocket into the air.
3rd Law - Action Reaction
Close contour lines indicate what?
Steep slopes
A science teacher asked her students to calculate the density of a toy block. The mass of the block was 116 grams. The volume of the block was 8 cubic centimeters. What was the density of the block, expressed in grams per cubic centimeter?
14.5 g/cm3
Which of the following is a biotic factor in an ecosystem?
Water
Sunlight
Temperature
A rotting log
The atomic number of an element is determined by the number of-
Protons
A 10-pound bowling ball rolling down a lane at a speed of 12 miles per hour
A 14-pound bowling ball rolling down a lane at a speed of 12 miles per hour
Which of the above would have the most kinetic energy?
A 14-pound bowling ball rolling down a lane at a speed of 12 miles per hour
Earth completes one rotation on its axis about every 24 hours. What would be the most likely result if Earth completed one rotation on its axis every 12 hours?
Earth would cycle through periods of daylight and darkness more quickly.
The relative positions of Earth, the Moon, and the Sun determine the Moon and Sun’s gravitational pull on the planet. For this reason, during which phases of the Moon do the lowest tides (neap tides) occur?
First quarter and last quarter
Which system of the human body is responsible for breaking down food to be used for energy?
Digestive
-Gray, metallic luster
-Solid at room temperature
-Brittle (hard, rigid, breaks easily)
-Conducts electricity (under certain circumstances)
Metalloid
When a ball is thrown, at which point along the ball’s path does the ball have the greatest potential energy but the least kinetic energy?
The highest point
What type of boundary would form mountain ranges?
Convergent
The entire range of all radiant energy, including light not visible to the human eye
The electromagnetic spectrum
All organic compounds contain _________ atoms.
carbon
On a camping trip, the group leader lit a campfire so the campers could roast marshmallows. What energy transformations occurred when the campfire was lit?
Chemical energy was transformed into heat and light energy.
Fe2O3 + ___ CO --> 2Fe + 3CO2
What number should be written in the blank?
3
A mover pushed a crate across a smooth warehouse floor a distance of 10 meters. If 250 joules of work was done, how much force (in newtons) did the mover exert on the crate to move it?
25 N
Totality of everything that exists, including planets, stars, galaxies, space and time
The Universe
Producers
An element in the Periodic Table has two orbitals in its electron cloud and four electrons in the outer orbital. What element is this?
Carbon
3Fe2O3
What is the total number of atoms in three molecules of iron oxide?
15
On a topographic map, concentric circles indicate what terrain feature?
Hill or Mountain
______________ forces change how and where an object moves.
Unbalanced
Since organisms within a food web are __________, the disappearance of one organism within the food web could affect all the organisms within that web
interdependent