Chemical Reactions and Energy

An _______ reaction is when more energy is absorbed than is released. This energy can be in the form of light, heat, electricity, etc.

• endothermic

• endergonic

• exothermic

• exergonic

Tags

NGSS.HS-PS1-4

An _______ reaction is when more thermal energy is absorbed than is released.

• endothermic

• endergonic

• exothermic

• exergonic

Tags

NGSS.HS-PS1-4

How do you know baking a cake is a chemical reaction?

• It tastes yummy.

• A new substance is formed.

• You mixed it together.

• It has ingredients.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Photosynthesis is an _____ reaction.

• EXOthermic

• ENDOthermic

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

If a chemical reaction produces light or sound, it is likely a _____ reaction.

• EXOthermic

• ENDOthermic

Tags

NGSS.HS-PS1-4

Has the same number and types of atoms on both the reactant side and the product side

• balanced equation

• unbalanced equation

• thermal energy

• matter

Tags

NGSS.HS-PS1-7

"In a reaction, the energy level of the products is lower than the reactants, and the difference in energy is released as heat."
Identify the type of reaction described.

Tags

NGSS.HS-PS1-4

What type of reaction occurs, and what is happening to the energy in this process?

• Endothermic, because energy is absorbed to produce heat and light.

• Exothermic, because energy is released in the form of heat and light.

• Endothermic, because the wood absorbs energy and turns into ash.

• Neutralization, because the fire balances the energy in the surroundings.

Tags

NGSS.HS-PS1-4

Predict what would happen if a reaction absorbs more energy than it releases. How would you detect this change?

Tags

NGSS.HS-PS1-4

Maria is conducting a simple experiment in her science class. She mixes 50 mL of vinegar with a teaspoon of baking soda in a beaker. As soon as she combines the two substances, bubbles form rapidly, and the beaker feels cooler to the touch.

Question 7.
What type of reaction is happening in Maria's experiment?

• A. Exothermic, because energy is released as bubbles form.

• B. Endothermic, because the solution absorbs energy, causing the beaker to feel cooler.

• C. Exothermic, because the reaction gives off light.

• D. Neutralization, because the reaction balances the pH of the solution.

Tags

NGSS.HS-PS1-4