One astronomical unit is equal to which distance?
a; the distance from earth to the moon
b; the distance from earth to the sun
c; the distance from the sun to pluto
d; the distance across the galaxy

What is the difference between topsoil and clay?

The bacteria in the human gut feeds on the food we eat and us break it down for better digestion. what does this exemplify? (a) predator-prey cycle (b) parasitism (c) mutualism (d) a disrupted food chain

Match each term to its scientific definition. a)natural world b)scientific method c)theory 1) everything that can be observed or explained scientifically 2) a well-supported explanation of all the evidence related to a natural phenomenon 3) the procedure of scientific inquiry used to investigate natural phenomena