Elements
What is the second most common element in the universe?
Helium
Which elements are called "noble" gases?
neon, argon, and heliium
Name an element used to make most planes and soda cans.
Aluminum
This element is found in diamonds, pencils (graphite), and everywhere on Earth.
The three types of elements on the periodic table of elements are called:
metals, nonmetals, and metalloids
Plants appear green because
chlorophyll pigments absorb red and blue light wavelengths for photosynthesis but reflect green light back to our eyes.