Q: In what ocean is the mid-atlantic ridge located? Choices: - indian ocean - pacific ocean - arctic ocean - atlantic ocean A:
atlantic ocean

Q: How many pairs of chromosomes do human have ? Choices: - 12 pairs - 31 pairs - 19 pairs - 23 pairs A:
23 pairs

Q: Q: Stis are diseases caused by what that spread through sexual contact? Choices: - amoeba - ecosystems - parasites - pathogens A:
A: pathogens

Question: Q: What is the complex network of nervous tissue that carries electrical messages throughout the body? Choices: - respiratory system - circulatory system - lymphatic system - nervous system A:
Answer: nervous system

*Question*
Q: What has the smallest, lightest atoms of all the elements and is colorless, odorless, tasteless and nontoxic, but highly flammable in its pure state? Choices: - helium - magnesium - barium - hydrogen A:
**Answer**
hydrogen

Q: Q: What happens to the temperature of matter as light is absorbed? Choices: - it stays the same - it triples - it drops - it increases A:
A: it increases