Q: What was the last supercontinent on earth? Choices: - rodinia - laurasia - eurasia - pangaea A:
pangaea

Q: In an endothermic reaction, what is absorbed by the reaction? Choices: - food - fuel - atoms - energy A:
energy

Q: Q: What is the term for many different types of animals within the same species? Choices: - pollution - habitat - differentiation - diversity A:
A: diversity

Question: Q: All atoms have equal numbers of what two particles? Choices: - nuclei and neutrons - photons and protons - electrons and neutrons - electrons and protons A:
Answer: electrons and protons

*Question*
Q: Desert plants have evolved processes to conserve water and deal with harsh conditions. a more efficient use of co2 allows plants to adapt to living with what? Choices: - less competition - more water - more sunlight - less water A:
**Answer**
less water

Q: What do you call the set of seventeen chemical elements possessing particular importance for a variety of industrial processes, used frequently in modern technology? Choices: - base chemicals - fossil fuel - reactive elements - rare earth metals A:
rare earth metals