What are the gaps between nerve cells called?

What is the galaxy closest in light-years to the Milky Way Galaxy?

What element is a diamond composed of?

What was the first planet discovered with the aid of a telescope?

What is the splitting of atomic nuclei called?

What is the sticky part of the pistil called?

What instrument do you use to measure wind speed?

What does the gall bladder secrete?

What is made by white blood cells to help fight off infection?

What is the calm center part of a hurricane called?

What layer of the Earth is right below the crust?

What is the first phase of mitosis?

What are the lower chambers of the human heart called?

Who begins food chains?

How many chambers make up the human heart?