Q: The bright color of poison dart frogs serves what purpose? Choices: - no purpose - attracting mates - attracting predators - warning predators A:
warning predators

(Question)
Q: What type of substance is any matter that has a fixed chemical composition and characteristic properties? Choices: - physical substance - versatile chemical substance - seawater chemical substance - pure chemical substance A:
(Answer)
pure chemical substance

Ques: Q: What is the term for how much matter is packed into a given space? Choices: - opacity - volume - mass - density A:
Ans: density

(Q).
Q: Where is pedocal soil commonly found? Choices: - deserts - forests - slopes - grasslands A:
(A).
grasslands

Ques:Q: Near-earth asteroids cross paths with earth, meaning they could collide; what are the paths called? Choices: - trajectory - curves - galaxies - orbits A:

Ans:orbits

Ques:Q: A major source of primary pollutants is the burning of oil and coal, which are types of what? Choices: - erosion fuels - renewable fuels - greenhouse gases - fossil fuels A:

Ans:
fossil fuels