Unit 3 Review
Flashcard
•
Science
•
5th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is the principle of conservation of mass?
Back
The principle of conservation of mass states that matter cannot be created or destroyed in a closed system. It means that the total mass of substances before and after a chemical reaction remains the same.
2.
FLASHCARD QUESTION
Front
What happens to the mass of clay when its shape is changed?
Back
The mass of the clay remains the same when its shape is changed. This demonstrates that matter is not destroyed when it changes form.
3.
FLASHCARD QUESTION
Front
What is the biosphere?
Back
The biosphere is the global sum of all ecosystems. It is the zone of life on Earth, including land, water, and the atmosphere.
4.
FLASHCARD QUESTION
Front
What is the hydrosphere?
Back
The hydrosphere includes all the water on Earth, such as oceans, rivers, lakes, and groundwater.
5.
FLASHCARD QUESTION
Front
What is El Nino?
Back
El Nino is a climate pattern that describes the unusual warming of surface waters in the eastern tropical Pacific Ocean, which can lead to significant weather changes.
6.
FLASHCARD QUESTION
Front
How can planting trees on steep hills help during heavy rains?
Back
Planting trees on steep hills can help prevent soil erosion and reduce the risk of landslides during heavy rains.
7.
FLASHCARD QUESTION
Front
What are sandbags used for in flood prevention?
Back
Sandbags are used to create barriers that prevent river water from entering buildings and other areas during floods.
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