Q: Some meteorites are made of iron and nickel and are thought to be very similar to what part of the earth? Choices: - crust - shelf - mantel - core A:
core

Q: Water is an oxide of what element? Choices: - nitrogen - helium - carbon - hydrogen A:
hydrogen

Q: Wine, air, and gunpowder are all examples of what kind of common mixtures? Choices: - combined - contiguous - heterogeneous - homogeneous A:
homogeneous

Q: What types of energy is released during a chemical reaction? Choices: - human, magnetic, electrical - temperature , electricity , light - magnetism, electricity, light - heat, electricity, light A:
heat, electricity, light