A long, coiled, threadlike structure made of DNA and protein.
What is a chromosome?
100
Small groups of atoms which are tightly bonded together?
What are molecules?
100
A measure of how much restriction there is in the flow of current
What is resistance?
100
This supercontinent consisted of all the Earth's continents joined together.
What is Pangaea?
200
The rate at which distance is covered
What is speed?
200
The type of cell reproduction/division where a diploid cell divides.
What is mitosis?
200
A measure of how much of a particular chemical is in a substance?
What is concentration?
200
amperes or amps (I)
What unit is current measured in?
200
Where plate boundaries move apart. Magma rises up and forms new rock where the plate has spread apart.
What is a divergent plate boundary?
300
Speed in a given direction
What is velocity?
300
Cell division that occurs in the cells of the ovaries and testes.
What is meiosis?
300
Reactants
What are the substances present at the start of a reaction.
300
When two globes are arranged one after the other in a line with the battery.
What is a series circuit?
300
Convection currents in the mantle
What is thought to cause the movements of the Earth's plates?
400
High-speed composite photography, ticker-timers, rulers and stopwatches, dataloggers and multiflash photography
What are ways that the motion of an object can be measured?
400
A family tree where individuals who show a particular
disease or characteristic are marked on it.
What is a pedigree?
400
The total mass of the products after a chemical reaction is exactly equal to the total mass of the reaction before the chemical reaction.
What is the Law of Conservation of Mass?
400
A description of the relationship between the current, voltage, and resistance on a circuit or
voltage = current x resistance
What is Ohm's law?
400
1. Quick covering of the organism in sediment (preventing weathering) and
2. Exclusion of oxygen and bacteria (preventing rotting)
What conditions are needed for fossils to form?
500
Newton's third law
Which one of Newton's law states that for every force there is a force of the same size acting in the opposite direction?
or
What is know as the action-reaction force pair?
500
A long molecule with two strands twisted together to form a double helix.
What is DNA?
500
A common method for speeding up reactions
What is a catalyst?
500
The pressure of water in a pipe
What is often used as an analogy for voltage?
500
Where plates scrape along each other. No rock is created or destroyed