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WorksheetsGr 7 Term 3 Exam Review #2
Total questions: 25
Worksheet time: 45mins
A train traveled 250 kilometers (km) from its starting point in 5 hours (h). What is the speed of the train?
A) 20 km/h
B) 25 km/h
C) 50 km/h
D) 500 km/h
What is the meaning of reference point?
What is the meaning of position?
What is the meaning of motion?
What is the meaning of speed?
To determine if an object has changed position, you need to know its position relative to itself.
True
False
Lizzie is pushing Alex on a scooter. Lizzie is pushing with 75 N of force to the left, and Alex is helping with 20 N to the left. What is the net force on the scooter?
A) 95 N, to the right
B) 95 N, to the left
C) 55 N, to the right
D) 55 N, to the left
Two people are pulling on a chain in opposite directions with forces of 500 N and 600 N. The forces would best be described as ____.
A) balanced forces
B) unbalanced forces
C) action-reaction forces
D) gravitational forces
Two people are pulling on a chain in opposite directions with forces of 800 N and 600 N. The forces would best be described as (a) .
What happens to an object that is moving at 10 m/s if only balanced forces act on it?
Which of Newton’s laws applies to action and reaction forces?
1st
2nd
3rd
4th
Calculate the weight of a book with a mass 0.25 kg. The gravitational acceleration of the book is 9.8 m/s2. Use the formula on page 61.
_____ N
Calculate the weight of a book of mass 2 kg. The gravitational acceleration of the book is 9.8 m/s2. Use the formula on page 61.
____N
What is the difference between contact and non-contact forces?
What happens to kinetic energy if the mass of a moving object is increased? (a)
In which diagram does the ball have the least amount of potential energy?
A
B
C
D
Differences in gravitational potential energy depend on an object’s (a) and (b) .
In which of the following situations is work (according to the science definition of work) being done?
You are pushing against the side of a house with extreme effort.
You are lifting a paper clip.
You are studying very hard by reading your textbook.
When an object that is made of magnetic material but is not a magnet comes in contact with a magnet _____.
A) its magnetic domains fall into alignment, and it begins to repel other objects made of magnetic material
B) its magnetic domains fall into alignment, and it begins to attract other objects made of magnetic material
C) its magnetic domains fall out of alignment, and it begins to repel other objects made of magnetic material
D) its magnetic domains fall out of alignment, and it begins to attract other objects made of magnetic material
How can you increase the magnetic potential energy in two magnets with like poles?
How can you increase the magnetic potential energy in two magnets with opposite poles?
What is the meaning of electric field?
If the distance between two charged objects increases, the electric force between them _____.
A) decreases
B) increases
C) remains the same
D) stops
Which of the following statements about the forces between charged objects is not true?
A) As the distance between charged objects decreases, the electric force between them decreases.
B) If one object is positively charged and another is negatively charged, the objects will attract each other.
C) Two negatively charged objects will repel each other.
D) As the amount of charge on either object decreases, the electric force between them decreases.
What is the difference between an open circuit and a closed circuit?
