Q: Which property can you study by comparing the mass of an object relative to its size? Choices: - volume - weight - motion - density A:
density

(Question)
Q: What do you call the movement of a substance from an area of a higher amount toward an area of lower amount? Choices: - filtration - extraction - precipitation - diffusion A:
(Answer)
diffusion

Ques: Q: Living species of chordates are classified into three major subphyla: vertebrata, urochordata, and what? Choices: - spirogyra - invertebrates - xerophyte - cephalochordata A:
Ans: cephalochordata

(Q).
Q: What 2 things keep polar bears warm in their arctic ecosystem? Choices: - hibernation, thick fur - colourful fur , blubber - camouflage, blubber - thick fur, blubber A:
(A).
thick fur, blubber

Ques:Q: Name the organ located behind the nasal cavity in which both food and air pass through? Choices: - medulla - sinus - diaphragm - pharynx A:

Ans:pharynx

Question: Q: What is the ph of pure water? Choices: - 5 - 4 - 2 - 7 A:
Answer:
7