Q: Earth is the only planet in the solar system that has what element, which is essential for human life, present in all three of its states? Choices: - helium - oxygen - carbon - water A:
water

(Question)
Q: What is the opposite of melting? Choices: - evaporation - liquidation - compression - freezing A:
(Answer)
freezing

Ques: Q: Before the atmosphere became oxygenated, the planet was subjected to what harmful energy source, meaning the first organisms would have flourished where they were more protected? Choices: - evaporation - conduction - convection - radiation A:
Ans: radiation

(Q).
Q: What biochemicals mediate changes in target cells by binding to specific receptors? Choices: - amino acids - acids - enzymes - hormones A:
(A).
hormones

Ques:Q: When magma reaches the surface through cracks in the earth's crust, what occurs? Choices: - volcanic explosion - magma eruption - tsunami - volcanic eruption A:

Ans:volcanic eruption

Q: In physics, _______ is defined as the average kinetic energy of the particles in an object? Choices: - climate - potential energy - heat - temperature A:
temperature