Q: What is the name of the second most electronegative element? Choices: - nitrogen - Hydrogen - carbon - oxygen A:
oxygen

(Question)
Q: What is the initial stage of scienetific investigations? Choices: - asking questions - forming hypothesis - making predictions - observation A:
(Answer)
observation

Ques: Q: What type of wave is visible light? Choices: - static - radio - acoustic - electromagnetic A:
Ans: electromagnetic

(Q).
Q: What are proteins that increase the rate of biochemical reactions? Choices: - metabolites - hormones - amino acids - enzymes A:
(A).
enzymes

Ques:Q: What do decomposers release once they have broken down the dead organisms? Choices: - essential molecules - unusable molecules - organic molecules - inorganic molecules A:

Ans:inorganic molecules

Question: Q: What is an alpha particle with two protons and two neutrons called? Choices: - chloride nucleus - hydrogen nucleus - hydrogen nucleus - helium nucleus A:
Answer:
helium nucleus