Unit 3: Energy Flow Test 1 MASH

Front

What is energy flow in ecosystems?

Back

Energy flow refers to the transfer of energy through a food chain, from producers to consumers and decomposers.

Front

What is a catalyst?

Back

A catalyst is a substance that increases the rate of a chemical reaction by lowering the activation energy required.

Front

Define exothermic reaction.

Back

An exothermic reaction is a chemical reaction that releases more energy than it absorbs, often in the form of heat.

Front

Define endothermic reaction.

Back

An endothermic reaction is a chemical reaction that absorbs more energy than it releases.

Front

What role do enzymes play in chemical reactions?

Back

Enzymes are biological catalysts that speed up chemical reactions in living organisms.

Front

What is activation energy?

Back

Activation energy is the minimum amount of energy required to initiate a chemical reaction.

Front

What is the difference between reactants and products?

Back

Reactants are the starting substances in a chemical reaction, while products are the substances formed as a result of the reaction.

Front

What is a chemical bond?

Back

A chemical bond is a lasting attraction between atoms that enables the formation of chemical compounds.

Front

What is the significance of the bond strength in chemical reactions?

Back

Bond strength determines how easily a bond can be broken; weaker bonds are more likely to break during reactions.

Front

What is a food chain?

Back

A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another.