Chemistry
Force and Motion
Earth Science
Ecology
Mystery
100
A student mixed two liquids and one settled on top of another. Is the a physical or chemical change and why?
physical- its density
100
Newton's second law.
What is force = mass x acceleration?
100
What is a nebula?
Cloud of gas and dust where stars are formed
100
Organisms that breakdown dead organisms.
What are decomposers?
100
What is a galaxy?
billions of stars, gas, dust amd planet held together by gravity
200
The number of molecules in 2H2O2
What is two molecules?
200
T or F. Objects can continue moving in a straight line without applying force.
What is true?
200
The distance from one wavecrest to another is
Wavelength
200
This results when organisms of the same species or different species attempt to use the same resources in the same place at the same time.
What is competition?
200
C6H12O6 would be best qualified as an (element or compound).
What is compound?
300
How many atoms of Hydrogen are in the formula
8
300
When an object changes speed or direction.
What is acceleration?
300
Charlie observes data of a mountain range forming at the edge of continent. What plate boundary is this evidence of?
What is a convergent plate boundary?
300
The level in the food pyramid with highest amount of energy.
What are producers?
300
Allen formed two chemical solutions. Solution #1 began to bubble and change colors. Solution #2 did nothing. What type of change could solution #1 be classified as?
What is a chemical change?
400
How many atoms of oxygen are in the formula?
6
400
Jasmine traveled a distance of 5 km to Jame's house, then a 10 km to the store, and lastly, 5 km to the park. She traveled a total of 1.5 hours, what is her average speed?
What is 13.3 km/hr?
400
Hurricane Harvey gained energy when returning to the Gulf because of this.
What is warm water?
400
These organisms survive on the animals hunted by others.
What are scavengers?
400
The chemical reaction that takes place in plants.
What is photosynthesis?
500
CH4+ 2O2 --> CO2+ 2H2O
does this equation demonstate the law of conservation of mass?
yes
500
An archer shot a 0.06 kg arrow at a target. The arrow accelerated at 5,000 m/s2 to reach a speed of 50.0 m/s as it left the bow. What is the net force on the arrow to the nearest Newton?
What is 300 N?
500
Rift valleys can form when fractures in Earth's crust widen. The valley walls slowly move at a rate of only a few millimeters a year. Rift valleys are caused by this.
What is a divergent plate boundary?
500
The other name for producers
What are autotrophs?
500
A change or the process of change by which an organism or species becomes better suited to its environment.
What is an adaptation?