In a scale model of the solar system, if the sun is represented by a ball with a diameter of about 8 inches, about how large would the earth be?
a the size of a marble
b the size of a popcorn seed
c the size of an apple
d the size of a grapefruit

Gabriel is at a stage where his body is changing physically; he is growing facial hair and building muscle. he is also just starting to make sperm. what is most likely gabriel’s age? 5 12 17 21

When a gasoline engine burns gasoline, what type of chemical reaction is occurring?

Drag each description to the correct location on the image. not all descriptions will be used. describe the parts of a comet. the frozen part of the comet the atmosphere of gases and dust formed when the nucleus vaporizes tail made of small, solid dust particles tail made of ions that appears to point away from the comet's orbit