Q: Q: What is electrons in the highest occupied principal energy level of an atom called? Choices: - non-valence electrons - shell electrons - gradient electrons - valence electrons A:
A: valence electrons

Q: Q: Regularly done aerobic activities can help build up endurance and make what vital organ stronger? Choices: - stomach - brain - skin - heart A:
A: heart

Q: Q: Around what percentage of the earth's surface water is contained in the ocean? Choices: - 92 % - 99% - 86 % - 97% A:
A: 97%

Q: Q: What type of energy travels through matter in wave form? Choices: - vibrational - magnetic - light - sound A:
A: sound