Q: What is an alloy of both tin and copper? Choices: - Cobalt - silver - Aluminium - bronze A:
bronze

(Question)
Q: Mendeleev organized what basic units into rows and columns? Choices: - solutions - compounds - animals - elements A:
(Answer)
elements

Ques: Q: What branch of science is based on the modern atomic theory, which states that all matter is composed of atoms? Choices: - physics - psychology - biology - chemistry A:
Ans: chemistry

(Q).
Q: Group 15 of the periodic table is also called which group? Choices: - oxygen - potassium - hydrogen - nitrogen A:
(A).
nitrogen

Ques:Q: What is the body system that digests food mechanically and chemically and absorbs nutrients? Choices: - metabolism system - internal system - ingestion system - digestive system A:

Ans:digestive system

Q: What is the name of the zone where water is deeper than 200 meters called? Choices: - transition zone - euphotic zone - eccentric zone - aphotic zone A:
aphotic zone