What keeps the planets in orbit revolving around the sun?

What force slows objects down when they rub against one another?

Why is Pluto classified as a dwarf planet?

Plants make food through a process called what?

What are the three types of symbiotic relationships?

A duck flies 60 meters in 10 seconds and a blue jay flies 32 meters in 4 seconds. Which one has the fastest speed?

What represents an intertwining of food chains within the same ecosystem?

How many stars are there in our Solar System?

What type of consumer eats plants?

Movement is measured by speed. How is speed calculated?

Name the four planets that fit the following clues: -closest to the sun -their surfaces are solid (terrestrial planets) -made up mostly of heavy metals such as iron and nickel -have either no moons or few moons

What travels in a straight line and can move through solids, liquids, gases, and empty space?