The diagram below shows the path of a roller coaster car on a track.
What happens as the roller coaster car travels from Point A to Point B?
A.
The car's kinetic energy decreases and is lost permanently from the system.
B.
The car's gravitational potential energy decreases and is lost permanently from the system.
C.
The car's gravitational potential energy is transformed into kinetic energy.
D.
The car's kinetic energy is transformed into gravitational potential energy.
C. The car's gravitational potential energy is transformed into kinetic energy.
The process of photosynthesis is modeled in the diagram below.
Which of the following is true about the glucose sugar produced during this process?
A.
It can only be used by animals that eat the plant because plants do not need glucose.
B.
It must be stored by the plant temporarily before it can be used.
C.
It must be used immediately by the plant, or it will break down into unusable materials.
D.
It can be used immediately by the plant, or it can be stored for later use.
D. It can be used immediately by the plant, or it can be stored for later use.
The diagram below represents the process of photosynthesis.
Which of the following is true about this process?
A.
Photosynthesis plays a role in cycling carbon and oxygen atoms through ecosystems.
B.
Photosynthesis results in an overall decrease in the number of carbon atoms in ecosystems.
C.
Photosynthesis permanently stores carbon and oxygen atoms inside plant tissues.
D.
Photosynthesis results in an overall increase in the number of oxygen atoms in ecosystems.
A. Photosynthesis plays a role in cycling carbon and oxygen atoms through ecosystems.
Ava made a device that contains two chemicals: lye and a strong acid. When she activates the device, the acid is added to the lye. When these two chemicals mix, they react and produce heat.
When Ava tests the device, she finds that it becomes far too hot but then cools off too quickly. How should Ava change the device to fix these problems?
A.
release the acid into the lye more slowly
B.
remove the lye and only use acid in the device
C.
increase the amount of acid added to the lye
D.
cover the device with a substance that conducts heat