MidTerm Exam Review #2
Flashcard
•
Science
•
8th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the formula to calculate net force?
Back
Net Force (F) = Mass (m) × Acceleration (a)
2.
FLASHCARD QUESTION
Front
If a vehicle accelerates at 1.5 m/s² and the net force is 1,800 N, what is the mass of the vehicle?
Back
Mass = Net Force / Acceleration = 1,800 N / 1.5 m/s² = 1,200 kg
3.
FLASHCARD QUESTION
Front
What is the mass of a sledgehammer if a net force of 14 N is applied to accelerate it at 4.0 m/s²?
Back
Mass = Net Force / Acceleration = 14 N / 4.0 m/s² = 3.5 kg
4.
FLASHCARD QUESTION
Front
In which position is it winter in North America when Earth is tilted away from the sun?
Back
Position 4, because North America is tilted away from the sun.
5.
FLASHCARD QUESTION
Front
What is the effect of the relative positions of the Sun, Moon, and Earth on ocean tides?
Back
The positions affect the gravitational pull, leading to high and low tides.
6.
FLASHCARD QUESTION
Front
What is the significance of balanced chemical equations?
Back
They show that the number of atoms for each element is conserved in a reaction.
7.
FLASHCARD QUESTION
Front
What is the role of oxygen in chemical reactions?
Back
Oxygen is often a reactant in combustion and respiration reactions.
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