Read the passage. Scientists often need a catalyst to start a chemical reaction. They need to apply heat, acids, or other materials to jump-start the experiment.

Which phrase is the best definition of catalyst?

something hot
something acidic
something that triggers
something that is scientific

the space race was a battle to make advanced technology to get to the moon and to get a better understanding of space.

cruel, heartless

explanation:

no every country is held to the same degree as others just some member countries such as the usa and germany are more economically sound so the need to show there support to all others  

a phrase from a poem by ralph waldo emerson about the battle of lexington and concord. emerson's words read, “here once the embattled farmers stood / and fired the shot heard round the world.”