Question

Question
1
Question
2
A)
Is freezing an endothermic or exothermic process? How do you know?
(1 point)
Freezing is endothermic because as water bonds into ice, the energy from bond formation is released andheats up the surrounding environment.
Freezing is exothermic because as water bonds into ice, the energy from bond formation is released andheats up the surrounding environment.
Freezing is endothermic because as water bonds into ice, the bonds absorb energy from the environmentin order to change states.
Freezing is exothermic because as water bonds into ice, the bonds absorb energy from the environment inorder to change states.
A)
Which statement correctly describes how energy transforms?
(1 point)
When a fire is burning, thermal energy is turned into visible energy in the form of light and chemical energyin the form of heat.
When a fire is burning, visible energy is turned into thermal energy in the form of light and chemical energyin the form of heat.
When a fire is burning, visible energy is turned into chemical energy in the form of light and thermal energyin the form of heat.
When a fire is burning, chemical energy is turned into visible energy in the form of light and thermal energyin the form of heat.
Question
3
Question
4
A)
Is a burning fire endothermic or exothermic? How do you know?
(1 point)
A burning fire is exothermic because a lot of heat is given off as the wood is converted into carbon dioxideand water.
A burning fire is exothermic because a lot of heat needs to be applied in the form of fire to break the bondsof the wood.
A burning fire is endothermic because a lot of heat needs to be applied in the form of fire to break thebonds of the wood.
A burning fire is endothermic because a lot of heat is given off as the wood is converted into carbon dioxideand water.
A)
Use the energy chain to answer the question.
fire heats up a pot → pot cooks food → food fuels body → body releases heat during activity
Where is energy created in this energy chain?
(1 point)
The body processing food is the creation of energy.
Starting a fire is the creation of energy.
Energy is never created but simply recycled and changed into other forms.
The food cooking is the creation of energy.
Question
5
A)
Inside an engine, gasoline combines with a spark to create combustion which in turn spins thewheels and moves the vehicle. Which parts of this process make the chemical reaction system?
(1 point)
All parts combined
The gasoline and spark
The engine and wheels
The wheels and the road

Answer 1

Here are the correct choices with brief explanations:

Question 1
- Answer: Freezing is exothermic because as water bonds into ice, the energy from bond formation is released and heats up the surrounding environment.

Question 2
- Answer: When a fire is burning, chemical energy is turned into visible energy in the form of light and thermal energy in the form of heat.

Question 3
- Answer: A burning fire is exothermic because a lot of heat is given off as the wood is converted into carbon dioxide and water.

Question 4
- Answer: Energy is never created but simply recycled and changed into other forms.

Question 5
- Answer: The gasoline and spark (they form the chemical reaction system).