Biology
Chemistry
Physics
Math
100
Who proposed the theory of evolution by natural selection?
Charles Darwin
100
What is the type of bond that forms between two atoms that share one or more pairs of electrons?
Covalent bond
100
What is the force that opposes motion between two surfaces in contact?
Frictional Force
100
A six sided dice is rolled. What is its probability of getting an odd number?
1/2, 50%
200
Where does ribosome synthesis occur in a cell?
the nucleolus
200
What is the process by which a solid changes directly into a gas without going through the liquid phase?
Sublimation
200
What is the process by which an object's velocity decreases as it moves away from a source of gravitational force?
Deceleration
200
On a map, a 12-centimeter length represents 72 kilometers. How many kilometers does a 17-centimeter length represent?
102 kilometers
300
In the immune system, which cell engulfs and digests pathogens?
phagocytes
300
What is the term for the amount of heat required to raise the temperature of one gram of a substance by one degree Celsius?
Specific heat capacity
300
What is the type of machine that uses levers to change the direction of force?
Lever
300
What is the ones digit of :
222,222 - 22,222 - 2,222 - 222 - 22 - 2
2
400
When protein enzymes are heated excessively in a test tube and their activity does not return to normal, the enzyme is said to be ___________.
denatured
400
What is the term for a substance that increases the rate of a chemical reaction without being consumed by the reaction?
Catalyst
400
What is the term for the force that causes an object to rotate around a pivot point?
Torque
400
Three circular arcs of radius 5 units bound the region shown. Arcs AB and AD are quarter-circles, and arc BCD is a semicircle. What is the area, in square units, of the region?
50
500
Which community interaction is defined by:
a close relationship between two species in which one benefits and the other is harmed?
parasitism
500
What is the process by which a mixture is separated based on differences in particle size?
Filteration
500
What is the term for the ratio of the output force to the input force in a machine?
Mechanical advantage
500
A mixture of 30 liters of paint is 25% red tint, 30% yellow tint and 45% water. 5 liters of yellow tint are added to the original mixture. What is the percent of yellow tint in the new mixture?
40%